| V-73669 | High | Anonymous enumeration of shares must not be allowed. | Allowing anonymous logon users (null session connections) to list all account names and enumerate all shared resources can provide a map of potential points to attack the system. |
| V-73545 | High | AutoPlay must be turned off for non-volume devices. | Allowing AutoPlay to execute may introduce malicious code to a system. AutoPlay begins reading from a drive as soon as media is inserted into the drive. As a result, the setup file of programs or... |
| V-73547 | High | The default AutoRun behavior must be configured to prevent AutoRun commands. | Allowing AutoRun commands to execute may introduce malicious code to a system. Configuring this setting prevents AutoRun commands from executing. |
| V-73385 | High | Directory data (outside the root DSE) of a non-public directory must be configured to prevent anonymous access. | To the extent that anonymous access to directory data (outside the root DSE) is permitted, read access control of the data is effectively disabled. If other means of controlling access (such as... |
| V-73667 | High | Anonymous enumeration of Security Account Manager (SAM) accounts must not be allowed. | Anonymous enumeration of SAM accounts allows anonymous logon users (null session connections) to list all accounts names, thus providing a list of potential points to attack the system. |
| V-73377 | High | Domain-created Active Directory Organizational Unit (OU) objects must have proper access control permissions. | When directory service database objects do not have appropriate access control permissions, it may be possible for malicious users to create, read, update, or delete the objects and degrade or... |
| V-73375 | High | The Active Directory Domain Controllers Organizational Unit (OU) object must have the proper access control permissions. | When Active Directory objects do not have appropriate access control permissions, it may be possible for malicious users to create, read, update, or delete the objects and degrade or destroy the... |
| V-73373 | High | Active Directory Group Policy objects must have proper access control permissions. | When directory service database objects do not have appropriate access control permissions, it may be possible for malicious users to create, read, update, or delete the objects and degrade or... |
| V-73371 | High | The Active Directory SYSVOL directory must have the proper access control permissions. | Improper access permissions for directory data files could allow unauthorized users to read, modify, or delete directory data.
The SYSVOL directory contains public files (to the domain) such as... |
| V-73549 | High | AutoPlay must be disabled for all drives. | Allowing AutoPlay to execute may introduce malicious code to a system. AutoPlay begins reading from a drive as soon media is inserted into the drive. As a result, the setup file of programs or... |
| V-73369 | High | Permissions on the Active Directory data files must only allow System and Administrators access. | Improper access permissions for directory data-related files could allow unauthorized users to read, modify, or delete directory data or audit trails. |
| V-73735 | High | The Act as part of the operating system user right must not be assigned to any groups or accounts. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
Accounts with the "Act as part of the operating system" user right can assume the... |
| V-73247 | High | Local volumes must use a format that supports NTFS attributes. | The ability to set access permissions and auditing is critical to maintaining the security and proper access controls of a system. To support this, volumes must be formatted using a file system... |
| V-73241 | High | The Windows Server 2016 system must use an anti-virus program. | Malicious software can establish a base on individual desktops and servers. Employing an automated mechanism to detect this type of software will aid in elimination of the software from the... |
| V-73325 | High | Windows Server 2016 reversible password encryption must be disabled. | Storing passwords using reversible encryption is essentially the same as storing clear-text versions of the passwords, which are easily compromised. For this reason, this policy must never be enabled. |
| V-73621 | High | Local accounts with blank passwords must be restricted to prevent access from the network. | An account without a password can allow unauthorized access to a system as only the username would be required. Password policies should prevent accounts with blank passwords from existing on a... |
| V-73747 | High | The Create a token object user right must not be assigned to any groups or accounts. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
The "Create a token object" user right allows a process to create an access token.... |
| V-73239 | High | Systems must be maintained at a supported servicing level. | Systems at unsupported servicing levels will not receive security updates for new vulnerabilities, which leave them subject to exploitation. Systems must be maintained at a servicing level... |
| V-73613 | High | Domain Controller PKI certificates must be issued by the DoD PKI or an approved External Certificate Authority (ECA). | A PKI implementation depends on the practices established by the Certificate Authority (CA) to ensure the implementation is secure. Without proper practices, the certificates issued by a CA have... |
| V-73615 | High | PKI certificates associated with user accounts must be issued by the DoD PKI or an approved External Certificate Authority (ECA). | A PKI implementation depends on the practices established by the Certificate Authority (CA) to ensure the implementation is secure. Without proper practices, the certificates issued by a CA have... |
| V-73755 | High | The Debug programs user right must only be assigned to the Administrators group. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
Accounts with the "Debug programs" user right can attach a debugger to any process or... |
| V-73221 | High | Only administrators responsible for the member server or standalone system must have Administrator rights on the system. | An account that does not have Administrator duties must not have Administrator rights. Such rights would allow the account to bypass or modify required security restrictions on that machine and... |
| V-73225 | High | Administrative accounts must not be used with applications that access the Internet, such as web browsers, or with potential Internet sources, such as email. | Using applications that access the Internet or have potential Internet sources using administrative privileges exposes a system to compromise. If a flaw in an application is exploited while... |
| V-73585 | High | The Windows Installer Always install with elevated privileges option must be disabled. | Standard user accounts must not be granted elevated privileges. Enabling Windows Installer to elevate privileges when installing applications can allow malicious persons and applications to gain... |
| V-73515 | High | Windows Server 2016 must be running Credential Guard on domain-joined member servers. | Credential Guard uses virtualization-based security to protect data that could be used in credential theft attacks if compromised. This authentication information, which was stored in the Local... |
| V-73599 | High | The Windows Remote Management (WinRM) service must not use Basic authentication. | Basic authentication uses plain-text passwords that could be used to compromise a system. Disabling Basic authentication will reduce this potential. |
| V-73219 | High | Only administrators responsible for the domain controller must have Administrator rights on the system. | An account that does not have Administrator duties must not have Administrator rights. Such rights would allow the account to bypass or modify required security restrictions on that machine and... |
| V-73593 | High | The Windows Remote Management (WinRM) client must not use Basic authentication. | Basic authentication uses plain-text passwords that could be used to compromise a system. Disabling Basic authentication will reduce this potential. |
| V-73217 | High | Users with Administrative privileges must have separate accounts for administrative duties and normal operational tasks. | Using a privileged account to perform routine functions makes the computer vulnerable to malicious software inadvertently introduced during a session that has been granted full privileges. |
| V-73665 | High | Anonymous SID/Name translation must not be allowed. | Allowing anonymous SID/Name translation can provide sensitive information for accessing a system. Only authorized users must be able to perform such translations. |
| V-73691 | High | The LAN Manager authentication level must be set to send NTLMv2 response only and to refuse LM and NTLM. | The Kerberos v5 authentication protocol is the default for authentication of users who are logging on to domain accounts. NTLM, which is less secure, is retained in later Windows versions for... |
| V-73675 | High | Anonymous access to Named Pipes and Shares must be restricted. | Allowing anonymous access to named pipes or shares provides the potential for unauthorized system access. This setting restricts access to those defined in "Network access: Named Pipes that can be... |
| V-73687 | High | Windows Server 2016 must be configured to prevent the storage of the LAN Manager hash of passwords. | The LAN Manager hash uses a weak encryption algorithm and there are several tools available that use this hash to retrieve account passwords. This setting controls whether a LAN Manager hash of... |
| V-73541 | Medium | Unauthenticated Remote Procedure Call (RPC) clients must be restricted from connecting to the RPC server. | Unauthenticated RPC clients may allow anonymous access to sensitive information. Configuring RPC to restrict unauthenticated RPC clients from connecting to the RPC server will prevent anonymous... |
| V-73389 | Medium | Active Directory Group Policy objects must be configured with proper audit settings. | When inappropriate audit settings are configured for directory service database objects, it may be possible for a user or process to update the data without generating any tracking data. The... |
| V-73383 | Medium | Separate, NSA-approved (Type 1) cryptography must be used to protect the directory data in transit for directory service implementations at a classified confidentiality level when replication data traverses a network cleared to a lower level than the data. | Directory data that is not appropriately encrypted is subject to compromise. Commercial-grade encryption does not provide adequate protection when the classification level of directory data in... |
| V-73661 | Medium | The setting Microsoft network server: Digitally sign communications (always) must be configured to Enabled. | The server message block (SMB) protocol provides the basis for many network operations. Digitally signed SMB packets aid in preventing man-in-the-middle attacks. If this policy is enabled, the SMB... |
| V-73381 | Medium | Domain controllers must run on a machine dedicated to that function. | Executing application servers on the same host machine with a directory server may substantially weaken the security of the directory server. Web or database server applications usually require... |
| V-73663 | Medium | The setting Microsoft network server: Digitally sign communications (if client agrees) must be configured to Enabled. | The server message block (SMB) protocol provides the basis for many network operations. Digitally signed SMB packets aid in preventing man-in-the-middle attacks. If this policy is enabled, the SMB... |
| V-73479 | Medium | Windows Server 2016 must be configured to audit System - Other System Events failures. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73475 | Medium | Windows Server 2016 must be configured to audit System - IPsec Driver failures. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73477 | Medium | Windows Server 2016 must be configured to audit System - Other System Events successes. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73471 | Medium | Windows Server 2016 must be configured to audit Privilege Use - Sensitive Privilege Use failures. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73365 | Medium | The Kerberos policy user ticket renewal maximum lifetime must be limited to seven days or less. | This setting determines the period of time (in days) during which a user's Ticket Granting Ticket (TGT) may be renewed. This security configuration limits the amount of time an attacker has to... |
| V-73473 | Medium | Windows Server 2016 must be configured to audit System - IPsec Driver successes. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73379 | Medium | Data files owned by users must be on a different logical partition from the directory server data files. | When directory service data files, especially for directories used for identification, authentication, or authorization, reside on the same logical partition as user-owned files, the directory... |
| V-73771 | Medium | The Deny log on locally user right on member servers must be configured to prevent access from highly privileged domain accounts on domain systems and from unauthenticated access on all systems. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
The "Deny log on locally" user right defines accounts that are prevented from logging... |
| V-73777 | Medium | The Enable computer and user accounts to be trusted for delegation user right must only be assigned to the Administrators group on domain controllers. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
The "Enable computer and user accounts to be trusted for delegation" user right allows... |
| V-73279 | Medium | A host-based firewall must be installed and enabled on the system. | A firewall provides a line of defense against attack, allowing or blocking inbound and outbound connections based on a set of rules. |
| V-73775 | Medium | The Deny log on through Remote Desktop Services user right on member servers must be configured to prevent access from highly privileged domain accounts and all local accounts on domain systems and from unauthenticated access on all systems. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
The "Deny log on through Remote Desktop Services" user right defines the accounts that... |
| V-73277 | Medium | The roles and features required by the system must be documented. | Unnecessary roles and features increase the attack surface of a system. Limiting roles and features of a system to only those necessary reduces this potential. The standard installation option... |
| V-73275 | Medium | Protection methods such as TLS, encrypted VPNs, or IPsec must be implemented if the data owner has a strict requirement for ensuring data integrity and confidentiality is maintained at every step of the data transfer and handling process. | Information can be either unintentionally or maliciously disclosed or modified during preparation for transmission, for example, during aggregation, at protocol transformation points, and during... |
| V-73779 | Medium | The Enable computer and user accounts to be trusted for delegation user right must not be assigned to any groups or accounts on member servers. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
The "Enable computer and user accounts to be trusted for delegation" user right allows... |
| V-73273 | Medium | Systems requiring data at rest protections must employ cryptographic mechanisms to prevent unauthorized disclosure and modification of the information at rest. | This requirement addresses protection of user-generated data as well as operating system-specific configuration data. Organizations may choose to employ different mechanisms to achieve... |
| V-73271 | Medium | Software certificate installation files must be removed from Windows Server 2016. | Use of software certificates and their accompanying installation files for end users to access resources is less secure than the use of hardware-based certificates. |
| V-73799 | Medium | The Profile single process user right must only be assigned to the Administrators group. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
Accounts with the "Profile single process" user right can monitor non-system processes... |
| V-73497 | Medium | WDigest Authentication must be disabled on Windows Server 2016. | When the WDigest Authentication protocol is enabled, plain-text passwords are stored in the Local Security Authority Subsystem Service (LSASS), exposing them to theft. WDigest is disabled by... |
| V-73399 | Medium | The Active Directory RID Manager$ object must be configured with proper audit settings. | When inappropriate audit settings are configured for directory service database objects, it may be possible for a user or process to update the data without generating any tracking data. The... |
| V-73495 | Medium | Local administrator accounts must have their privileged token filtered to prevent elevated privileges from being used over the network on domain systems. | A compromised local administrator account can provide means for an attacker to move laterally between domain systems.
With User Account Control enabled, filtering the privileged token for local... |
| V-73717 | Medium | User Account Control must only elevate UIAccess applications that are installed in secure locations. | User Account Control (UAC) is a security mechanism for limiting the elevation of privileges, including administrative accounts, unless authorized. This setting configures Windows to only allow... |
| V-73493 | Medium | The display of slide shows on the lock screen must be disabled. | Slide shows that are displayed on the lock screen could display sensitive information to unauthorized personnel. Turning off this feature will limit access to the information to a logged-on user. |
| V-73419 | Medium | Windows Server 2016 must be configured to audit Account Management - Other Account Management Events successes. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73491 | Medium | Windows Server 2016 must be configured to audit System - System Integrity failures. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73427 | Medium | Windows Server 2016 must be configured to audit Account Management - User Account Management successes. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73391 | Medium | The Active Directory Domain object must be configured with proper audit settings. | When inappropriate audit settings are configured for directory service database objects, it may be possible for a user or process to update the data without generating any tracking data. The... |
| V-73393 | Medium | The Active Directory Infrastructure object must be configured with proper audit settings. | When inappropriate audit settings are configured for directory service database objects, it may be possible for a user or process to update the data without generating any tracking data. The... |
| V-73395 | Medium | The Active Directory Domain Controllers Organizational Unit (OU) object must be configured with proper audit settings. | When inappropriate audit settings are configured for directory service database objects, it may be possible for a user or process to update the data without generating any tracking data. The... |
| V-73397 | Medium | The Active Directory AdminSDHolder object must be configured with proper audit settings. | When inappropriate audit settings are configured for directory service database objects, it may be possible for a user or process to update the data without generating any tracking data. The... |
| V-73417 | Medium | Windows Server 2016 must be configured to audit Account Management - Computer Account Management successes. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73223 | Medium | Passwords for the built-in Administrator account must be changed at least every 60 days. | The longer a password is in use, the greater the opportunity for someone to gain unauthorized knowledge of the password. The built-in Administrator account is not generally used and its password... |
| V-73709 | Medium | UIAccess applications must not be allowed to prompt for elevation without using the secure desktop. | User Account Control (UAC) is a security mechanism for limiting the elevation of privileges, including administrative accounts, unless authorized. This setting prevents User Interface... |
| V-73415 | Medium | Windows Server 2016 must be configured to audit Account Logon - Credential Validation failures. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73423 | Medium | Windows Server 2016 must be configured to audit Account Management - Security Group Management successes. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73303 | Medium | FTP servers must be configured to prevent anonymous logons. | The FTP service allows remote users to access shared files and directories. Allowing anonymous FTP connections makes user auditing difficult.
Using accounts that have administrator privileges to... |
| V-73301 | Medium | Windows PowerShell 2.0 must not be installed. | Windows PowerShell 5.0 added advanced logging features that can provide additional detail when malware has been run on a system. Disabling the Windows PowerShell 2.0 mitigates against a downgrade... |
| V-73469 | Medium | Windows Server 2016 must be configured to audit Privilege Use - Sensitive Privilege Use successes. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73305 | Medium | FTP servers must be configured to prevent access to the system drive. | The FTP service allows remote users to access shared files and directories that could provide access to system resources and compromise the system, especially if the user can gain access to the... |
| V-73463 | Medium | Windows Server 2016 must be configured to audit Policy Change - Audit Policy Change failures. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73309 | Medium | Windows 2016 account lockout duration must be configured to 15 minutes or greater. | The account lockout feature, when enabled, prevents brute-force password attacks on the system. This parameter specifies the period of time that an account will remain locked after the specified... |
| V-73461 | Medium | Windows Server 2016 must be configured to audit Policy Change - Audit Policy Change successes. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73467 | Medium | Windows Server 2016 must be configured to audit Policy Change - Authorization Policy Change successes. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73465 | Medium | Windows Server 2016 must be configured to audit Policy Change - Authentication Policy Change successes. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73411 | Medium | Event Viewer must be protected from unauthorized modification and deletion. | Protecting audit information also includes identifying and protecting the tools used to view and manipulate log data. Therefore, protecting audit tools is necessary to prevent unauthorized... |
| V-73789 | Medium | The Load and unload device drivers user right must only be assigned to the Administrators group. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
The "Load and unload device drivers" user right allows a user to load device drivers... |
| V-73787 | Medium | The Increase scheduling priority user right must only be assigned to the Administrators group. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
Accounts with the "Increase scheduling priority" user right can change a scheduling... |
| V-73265 | Medium | System files must be monitored for unauthorized changes. | Monitoring system files for changes against a baseline on a regular basis may help detect the possible introduction of malicious code on a system. |
| V-73785 | Medium | The Impersonate a client after authentication user right must only be assigned to Administrators, Service, Local Service, and Network Service. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
The "Impersonate a client after authentication" user right allows a program to... |
| V-73267 | Medium | Non-system-created file shares on a system must limit access to groups that require it. | Shares on a system provide network access. To prevent exposing sensitive information, where shares are necessary, permissions must be reconfigured to give the minimum access to accounts that require it. |
| V-73783 | Medium | The Generate security audits user right must only be assigned to Local Service and Network Service. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
The "Generate security audits" user right specifies users and processes that can... |
| V-73261 | Medium | Windows Server 2016 accounts must require passwords. | The lack of password protection enables anyone to gain access to the information system, which opens a backdoor opportunity for intruders to compromise the system as well as other resources.... |
| V-73781 | Medium | The Force shutdown from a remote system user right must only be assigned to the Administrators group. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
Accounts with the "Force shutdown from a remote system" user right can remotely shut... |
| V-73263 | Medium | Passwords must be configured to expire. | Passwords that do not expire or are reused increase the exposure of a password with greater probability of being discovered or cracked. |
| V-73721 | Medium | User Account Control must virtualize file and registry write failures to per-user locations. | User Account Control (UAC) is a security mechanism for limiting the elevation of privileges, including administrative accounts, unless authorized. This setting configures non-UAC-compliant... |
| V-73529 | Medium | Printing over HTTP must be prevented. | Some features may communicate with the vendor, sending system information or downloading data or components for the feature. Turning off this capability will prevent potentially sensitive... |
| V-73487 | Medium | Administrator accounts must not be enumerated during elevation. | Enumeration of administrator accounts when elevating can provide part of the logon information to an unauthorized user. This setting configures the system to always require users to type in a... |
| V-73481 | Medium | Windows Server 2016 must be configured to audit System - Security State Change successes. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73727 | Medium | Zone information must be preserved when saving attachments. | Attachments from outside sources may contain malicious code. Preserving zone of origin (Internet, intranet, local, restricted) information on file attachments allows Windows to determine risk. |
| V-73483 | Medium | Windows Server 2016 must be configured to audit System - Security System Extension successes. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73729 | Medium | The Access Credential Manager as a trusted caller user right must not be assigned to any groups or accounts. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
Accounts with the "Access Credential Manager as a trusted caller" user right may be... |
| V-73521 | Medium | Early Launch Antimalware, Boot-Start Driver Initialization Policy must prevent boot drivers identified as bad. | Compromised boot drivers can introduce malware prior to protection mechanisms that load after initialization. The Early Launch Antimalware driver can limit allowed drivers based on classifications... |
| V-91779 | Medium | The password for the krbtgt account on a domain must be reset at least every 180 days. | The krbtgt account acts as a service account for the Kerberos Key Distribution Center (KDC) service. The account and password are created when a domain is created and the password is typically not... |
| V-73527 | Medium | Downloading print driver packages over HTTP must be prevented. | Some features may communicate with the vendor, sending system information or downloading data or components for the feature. Turning off this capability will prevent potentially sensitive... |
| V-73489 | Medium | Windows Server 2016 must be configured to audit System - System Integrity successes. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73525 | Medium | Group Policy objects must be reprocessed even if they have not changed. | Registry entries for group policy settings can potentially be changed from the required configuration. This could occur as part of troubleshooting or by a malicious process on a compromised... |
| V-73803 | Medium | The Take ownership of files or other objects user right must only be assigned to the Administrators group. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
Accounts with the "Take ownership of files or other objects" user right can take... |
| V-73311 | Medium | Windows Server 2016 must have the number of allowed bad logon attempts configured to three or less. | The account lockout feature, when enabled, prevents brute-force password attacks on the system. The higher this value is, the less effective the account lockout feature will be in protecting the... |
| V-73313 | Medium | Windows Server 2016 must have the period of time before the bad logon counter is reset configured to 15 minutes or greater. | The account lockout feature, when enabled, prevents brute-force password attacks on the system. This parameter specifies the period of time that must pass after failed logon attempts before the... |
| V-73315 | Medium | Windows Server 2016 password history must be configured to 24 passwords remembered. | A system is more vulnerable to unauthorized access when system users recycle the same password several times without being required to change to a unique password on a regularly scheduled basis.... |
| V-73317 | Medium | Windows Server 2016 maximum password age must be configured to 60 days or less. | The longer a password is in use, the greater the opportunity for someone to gain unauthorized knowledge of the passwords. Scheduled changing of passwords hinders the ability of unauthorized system... |
| V-73319 | Medium | Windows Server 2016 minimum password age must be configured to at least one day. | Permitting passwords to be changed in immediate succession within the same day allows users to cycle passwords through their history database. This enables users to effectively negate the purpose... |
| V-73573 | Medium | The Remote Desktop Session Host must require secure Remote Procedure Call (RPC) communications. | Allowing unsecure RPC communication exposes the system to man-in-the-middle attacks and data disclosure attacks. A man-in-the-middle attack occurs when an intruder captures packets between a... |
| V-73443 | Medium | Windows Server 2016 must be configured to audit Logon/Logoff - Account Lockout successes. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73259 | Medium | Outdated or unused accounts must be removed from the system or disabled. | Outdated or unused accounts provide penetration points that may go undetected. Inactive accounts must be deleted if no longer necessary or, if still required, disabled until needed.
Satisfies:... |
| V-78127 | Medium | Orphaned security identifiers (SIDs) must be removed from user rights on Windows 2016. | Accounts or groups given rights on a system may show up as unresolved SIDs for various reasons including deletion of the accounts or groups. If the account or group objects are reanimated, there... |
| V-73657 | Medium | Unencrypted passwords must not be sent to third-party Server Message Block (SMB) servers. | Some non-Microsoft SMB servers only support unencrypted (plain-text) password authentication. Sending plain-text passwords across the network when authenticating to an SMB server reduces the... |
| V-78125 | Medium | The Server Message Block (SMB) v1 protocol must be disabled on the SMB client. | SMBv1 is a legacy protocol that uses the MD5 algorithm as part of SMB. MD5 is known to be vulnerable to a number of attacks such as collision and preimage attacks as well as not being FIPS compliant. |
| V-73651 | Medium | Caching of logon credentials must be limited. | The default Windows configuration caches the last logon credentials for users who log on interactively to a system. This feature is provided for system availability reasons, such as the user's... |
| V-78123 | Medium | The Server Message Block (SMB) v1 protocol must be disabled on the SMB server. | SMBv1 is a legacy protocol that uses the MD5 algorithm as part of SMB. MD5 is known to be vulnerable to a number of attacks such as collision and preimage attacks as well as not being FIPS compliant. |
| V-73653 | Medium | The setting Microsoft network client: Digitally sign communications (always) must be configured to Enabled. | The server message block (SMB) protocol provides the basis for many network operations. Digitally signed SMB packets aid in preventing man-in-the-middle attacks. If this policy is enabled, the SMB... |
| V-73531 | Medium | The network selection user interface (UI) must not be displayed on the logon screen. | Enabling interaction with the network selection UI allows users to change connections to available networks without signing in to Windows. |
| V-73251 | Medium | Permissions for program file directories must conform to minimum requirements. | Changing the system's file and directory permissions allows the possibility of unauthorized and anonymous modification to the operating system and installed applications.
The default permissions... |
| V-73795 | Medium | The Modify firmware environment values user right must only be assigned to the Administrators group. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
Accounts with the "Modify firmware environment values" user right can change hardware... |
| V-73253 | Medium | Permissions for the Windows installation directory must conform to minimum requirements. | Changing the system's file and directory permissions allows the possibility of unauthorized and anonymous modification to the operating system and installed applications.
The default permissions... |
| V-73797 | Medium | The Perform volume maintenance tasks user right must only be assigned to the Administrators group. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
Accounts with the "Perform volume maintenance tasks" user right can manage volume and... |
| V-73413 | Medium | Windows Server 2016 must be configured to audit Account Logon - Credential Validation successes. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73791 | Medium | The Lock pages in memory user right must not be assigned to any groups or accounts. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
The "Lock pages in memory" user right allows physical memory to be assigned to... |
| V-73793 | Medium | The Manage auditing and security log user right must only be assigned to the Administrators group. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
Accounts with the "Manage auditing and security log" user right can manage the... |
| V-73637 | Medium | The setting Domain member: Digitally sign secure channel data (when possible) must be configured to Enabled. | Requests sent on the secure channel are authenticated, and sensitive information (such as passwords) is encrypted, but the channel is not integrity checked. If this policy is enabled, outgoing... |
| V-73539 | Medium | Users must be prompted to authenticate when the system wakes from sleep (plugged in). | A system that does not require authentication when resuming from sleep may provide access to unauthorized users. Authentication must always be required when accessing a system. This setting... |
| V-73635 | Medium | The setting Domain member: Digitally encrypt secure channel data (when possible) must be configured to enabled. | Requests sent on the secure channel are authenticated, and sensitive information (such as passwords) is encrypted, but not all information is encrypted. If this policy is enabled, outgoing secure... |
| V-73533 | Medium | Local users on domain-joined computers must not be enumerated. | The username is one part of logon credentials that could be used to gain access to a system. Preventing the enumeration of users limits this information to authorized personnel. |
| V-73633 | Medium | The setting Domain member: Digitally encrypt or sign secure channel data (always) must be configured to Enabled. | Requests sent on the secure channel are authenticated, and sensitive information (such as passwords) is encrypted, but not all information is encrypted. If this policy is enabled, outgoing secure... |
| V-73631 | Medium | Domain controllers must be configured to allow reset of machine account passwords. | Enabling this setting on all domain controllers in a domain prevents domain members from changing their computer account passwords. If these passwords are weak or compromised, the inability to... |
| V-73739 | Medium | The Allow log on locally user right must only be assigned to the Administrators group. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
Accounts with the "Allow log on locally" user right can log on interactively to a system. |
| V-73737 | Medium | The Add workstations to domain user right must only be assigned to the Administrators group. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
Accounts with the "Add workstations to domain" right may add computers to a domain.... |
| V-73553 | Medium | The Application event log size must be configured to 32768 KB or greater. | Inadequate log size will cause the log to fill up quickly. This may prevent audit events from being recorded properly and require frequent attention by administrative personnel. |
| V-73733 | Medium | The Access this computer from the network user right must only be assigned to the Administrators and Authenticated Users groups on member servers. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
Accounts with the "Access this computer from the network" user right may access... |
| V-73639 | Medium | The computer account password must not be prevented from being reset. | Computer account passwords are changed automatically on a regular basis. Disabling automatic password changes can make the system more vulnerable to malicious access. Frequent password changes can... |
| V-73731 | Medium | The Access this computer from the network user right must only be assigned to the Administrators, Authenticated Users, and
Enterprise Domain Controllers groups on domain controllers. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
Accounts with the "Access this computer from the network" right may access resources... |
| V-73537 | Medium | Users must be prompted to authenticate when the system wakes from sleep (on battery). | A system that does not require authentication when resuming from sleep may provide access to unauthorized users. Authentication must always be required when accessing a system. This setting... |
| V-73245 | Medium | Servers must have a host-based intrusion detection or prevention system. | A properly configured Host-based Intrusion Detection System (HIDS) or Host-based Intrusion Prevention System (HIPS) provides another level of defense against unauthorized access to critical... |
| V-73321 | Medium | Windows Server 2016 minimum password length must be configured to 14 characters. | Information systems not protected with strong password schemes (including passwords of minimum length) provide the opportunity for anyone to crack the password, thus gaining access to the system... |
| V-73323 | Medium | Windows Server 2016 must have the built-in Windows password complexity policy enabled. | The use of complex passwords increases their strength against attack. The built-in Windows password complexity policy requires passwords to contain at least three of the four types of characters... |
| V-73249 | Medium | Permissions for the system drive root directory (usually C:\) must conform to minimum requirements. | Changing the system's file and directory permissions allows the possibility of unauthorized and anonymous modification to the operating system and installed applications.
The default permissions... |
| V-73643 | Medium | Windows Server 2016 must be configured to require a strong session key. | A computer connecting to a domain controller will establish a secure channel. The secure channel connection may be subject to compromise, such as hijacking or eavesdropping, if strong session keys... |
| V-73641 | Medium | The maximum age for machine account passwords must be configured to 30 days or less. | Computer account passwords are changed automatically on a regular basis. This setting controls the maximum password age that a machine account may have. This must be set to no more than 30 days,... |
| V-73409 | Medium | Permissions for the System event log must prevent access by non-privileged accounts. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73645 | Medium | The machine inactivity limit must be set to 15 minutes, locking the system with the screen saver. | Unattended systems are susceptible to unauthorized use and should be locked when unattended. The screen saver should be set at a maximum of 15 minutes and be password protected. This protects... |
| V-73405 | Medium | Permissions for the Application event log must prevent access by non-privileged accounts. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73407 | Medium | Permissions for the Security event log must prevent access by non-privileged accounts. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73401 | Medium | Audit records must be backed up to a different system or media than the system being audited. | Protection of log data includes assuring the log data is not accidentally lost or deleted. Audit information stored in one location is vulnerable to accidental or incidental deletion or alteration. |
| V-73403 | Medium | Windows Server 2016 must, at a minimum, off-load audit records of interconnected systems in real time and off-load standalone systems weekly. | Protection of log data includes assuring the log data is not accidentally lost or deleted. Audit information stored in one location is vulnerable to accidental or incidental deletion or alteration. |
| V-73625 | Medium | Windows Server 2016 built-in guest account must be renamed. | The built-in guest account is a well-known user account on all Windows systems and, as initially installed, does not require a password. This can allow access to system resources by unauthorized... |
| V-73749 | Medium | The Create global objects user right must only be assigned to Administrators, Service, Local Service, and Network Service. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
Accounts with the "Create global objects" user right can create objects that are... |
| V-73627 | Medium | Audit policy using subcategories must be enabled. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73623 | Medium | Windows Server 2016 built-in administrator account must be renamed. | The built-in administrator account is a well-known account subject to attack. Renaming this account to an unidentified name improves the protection of this account and the system. |
| V-73743 | Medium | The Back up files and directories user right must only be assigned to the Administrators group. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
Accounts with the "Back up files and directories" user right can circumvent file and... |
| V-73741 | Medium | The Allow log on through Remote Desktop Services user right must only be assigned to the Administrators group. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
Accounts with the "Allow log on through Remote Desktop Services" user right can access... |
| V-73629 | Medium | Domain controllers must require LDAP access signing. | Unsigned network traffic is susceptible to man-in-the-middle attacks, where an intruder captures packets between the server and the client and modifies them before forwarding them to the client.... |
| V-73745 | Medium | The Create a pagefile user right must only be assigned to the Administrators group. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
Accounts with the "Create a pagefile" user right can change the size of a pagefile,... |
| V-73707 | Medium | User Account Control approval mode for the built-in Administrator must be enabled. | User Account Control (UAC) is a security mechanism for limiting the elevation of privileges, including administrative accounts, unless authorized. This setting configures the built-in... |
| V-73655 | Medium | The setting Microsoft network client: Digitally sign communications (if server agrees) must be configured to Enabled. | The server message block (SMB) protocol provides the basis for many network operations. If this policy is enabled, the SMB client will request packet signing when communicating with an SMB server... |
| V-73299 | Medium | The Server Message Block (SMB) v1 protocol must be uninstalled. | SMBv1 is a legacy protocol that uses the MD5 algorithm as part of SMB. MD5 is known to be vulnerable to a number of attacks such as collision and preimage attacks and is not FIPS compliant. |
| V-73233 | Medium | Shared user accounts must not be permitted on the system. | Shared accounts (accounts where two or more people log on with the same user identification) do not provide adequate identification and authentication. There is no way to provide for... |
| V-73555 | Medium | The Security event log size must be configured to 196608 KB or greater. | Inadequate log size will cause the log to fill up quickly. This may prevent audit events from being recorded properly and require frequent attention by administrative personnel. |
| V-73231 | Medium | Manually managed application account passwords must be changed at least annually or when a system administrator with knowledge of the password leaves the organization. | Setting application account passwords to expire may cause applications to stop functioning. However, not changing them on a regular basis exposes them to attack. If managed service accounts are... |
| V-73237 | Medium | Windows Server 2016 domain-joined systems must have a Trusted Platform Module (TPM) enabled and ready for use. | Credential Guard uses virtualization-based security to protect data that could be used in credential theft attacks if compromised. A number of system requirements must be met in order for... |
| V-73235 | Medium | Windows Server 2016 must employ a deny-all, permit-by-exception policy to allow the execution of authorized software programs. | Using a whitelist provides a configuration management method to allow the execution of only authorized software. Using only authorized software decreases risk by limiting the number of potential... |
| V-73773 | Medium | The Deny log on through Remote Desktop Services user right on domain controllers must be configured to prevent unauthenticated access. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
The "Deny log on through Remote Desktop Services" user right defines the accounts that... |
| V-73609 | Medium | The US DoD CCEB Interoperability Root CA cross-certificates must be installed in the Untrusted Certificates Store on unclassified systems. | To ensure users do not experience denial of service when performing certificate-based authentication to DoD websites due to the system chaining to a root other than DoD Root CAs, the US DoD CCEB... |
| V-73439 | Medium | Windows Server 2016 must be configured to audit DS Access - Directory Service Changes successes. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73575 | Medium | Remote Desktop Services must be configured with the client connection encryption set to High Level. | Remote connections must be encrypted to prevent interception of data or sensitive information. Selecting "High Level" will ensure encryption of Remote Desktop Services sessions in both directions. |
| V-73431 | Medium | Windows Server 2016 must be configured to audit Detailed Tracking - Plug and Play Events successes. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73433 | Medium | Windows Server 2016 must be configured to audit Detailed Tracking - Process Creation successes. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73435 | Medium | Windows Server 2016 must be configured to audit DS Access - Directory Service Access successes. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73437 | Medium | Windows Server 2016 must be configured to audit DS Access - Directory Service Access failures. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73611 | Medium | Domain controllers must have a PKI server certificate. | Domain controllers are part of the chain of trust for PKI authentications. Without the appropriate certificate, the authenticity of the domain controller cannot be verified. Domain controllers... |
| V-73759 | Medium | The Deny access to this computer from the network user right on member servers must be configured to prevent access from highly privileged domain accounts and local accounts on domain systems, and from unauthenticated access on all systems. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
The "Deny access to this computer from the network" user right defines the accounts... |
| V-73617 | Medium | Active Directory user accounts, including administrators, must be configured to require the use of a Common Access Card (CAC), Personal Identity Verification (PIV)-compliant hardware token, or Alternate Logon Token (ALT) for user authentication. | Smart cards such as the CAC support a two-factor authentication technique. This provides a higher level of trust in the asserted identity than use of the username and password for... |
| V-73441 | Medium | Windows Server 2016 must be configured to audit DS Access - Directory Service Changes failures. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73559 | Medium | Windows Server 2016 Windows SmartScreen must be enabled. | Windows SmartScreen helps protect systems from programs downloaded from the internet that may be malicious. Enabling SmartScreen will warn users of potentially malicious programs. |
| V-73751 | Medium | The Create permanent shared objects user right must not be assigned to any groups or accounts. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
Accounts with the "Create permanent shared objects" user right could expose sensitive... |
| V-73753 | Medium | The Create symbolic links user right must only be assigned to the Administrators group. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
Accounts with the "Create symbolic links" user right can create pointers to other... |
| V-73757 | Medium | The Deny access to this computer from the network user right on domain controllers must be configured to prevent unauthenticated access. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
The "Deny access to this computer from the network" user right defines the accounts... |
| V-73685 | Medium | Kerberos encryption types must be configured to prevent the use of DES and RC4 encryption suites. | Certain encryption types are no longer considered secure. The DES and RC4 encryption suites must not be used for Kerberos encryption.
Note: Organizations with domain controllers running earlier... |
| V-73569 | Medium | Local drives must be prevented from sharing with Remote Desktop Session Hosts. | Preventing users from sharing the local drives on their client computers with Remote Session Hosts that they access helps reduce possible exposure of sensitive data. |
| V-73445 | Medium | Windows Server 2016 must be configured to audit Logon/Logoff - Account Lockout failures. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73255 | Medium | Default permissions for the HKEY_LOCAL_MACHINE registry hive must be maintained. | The registry is integral to the function, security, and stability of the Windows system. Changing the system's registry permissions allows the possibility of unauthorized and anonymous... |
| V-73589 | Medium | Automatically signing in the last interactive user after a system-initiated restart must be disabled. | Windows can be configured to automatically sign the user back in after a Windows Update restart. Some protections are in place to help ensure this is done in a secure fashion; however, disabling... |
| V-73227 | Medium | Members of the Backup Operators group must have separate accounts for backup duties and normal operational tasks. | Backup Operators are able to read and write to any file in the system, regardless of the rights assigned to it. Backup and restore rights permit users to circumvent the file access restrictions... |
| V-73229 | Medium | Manually managed application account passwords must be at least 15 characters in length. | Application/service account passwords must be of sufficient length to prevent being easily cracked. Application/service accounts that are manually managed must have passwords at least 15... |
| V-73587 | Medium | Users must be notified if a web-based program attempts to install software. | Web-based programs may attempt to install malicious software on a system. Ensuring users are notified if a web-based program attempts to install software allows them to refuse the installation. |
| V-73447 | Medium | Windows Server 2016 must be configured to audit Logon/Logoff - Group Membership successes. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73581 | Medium | Indexing of encrypted files must be turned off. | Indexing of encrypted files may expose sensitive data. This setting prevents encrypted files from being indexed. |
| V-73583 | Medium | Users must be prevented from changing installation options. | Installation options for applications are typically controlled by administrators. This setting prevents users from changing installation options that may bypass security features. |
| V-73429 | Medium | Windows Server 2016 must be configured to audit Account Management - User Account Management failures. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73507 | Medium | Insecure logons to an SMB server must be disabled. | Insecure guest logons allow unauthenticated access to shared folders. Shared resources on a system must require authentication to establish proper access. |
| V-73713 | Medium | User Account Control must automatically deny standard user requests for elevation. | User Account Control (UAC) is a security mechanism for limiting the elevation of privileges, including administrative accounts, unless authorized. This setting controls the behavior of elevation... |
| V-73509 | Medium | Hardened UNC paths must be defined to require mutual authentication and integrity for at least the \\*\SYSVOL and \\*\NETLOGON shares. | Additional security requirements are applied to Universal Naming Convention (UNC) paths specified in hardened UNC paths before allowing access to them. This aids in preventing tampering with or... |
| V-73561 | Medium | Explorer Data Execution Prevention must be enabled. | Data Execution Prevention provides additional protection by performing checks on memory to help prevent malicious code from running. This setting will prevent Data Execution Prevention from being... |
| V-73715 | Medium | User Account Control must be configured to detect application installations and prompt for elevation. | User Account Control (UAC) is a security mechanism for limiting the elevation of privileges, including administrative accounts, unless authorized. This setting requires Windows to respond to... |
| V-73607 | Medium | The DoD Interoperability Root CA cross-certificates must be installed in the Untrusted Certificates Store on unclassified systems. | To ensure users do not experience denial of service when performing certificate-based authentication to DoD websites due to the system chaining to a root other than DoD Root CAs, the DoD... |
| V-73605 | Medium | The DoD Root CA certificates must be installed in the Trusted Root Store. | To ensure secure DoD websites and DoD-signed code are properly validated, the system must trust the DoD Root Certificate Authorities (CAs). The DoD root certificates will ensure that the trust... |
| V-73567 | Medium | Passwords must not be saved in the Remote Desktop Client. | Saving passwords in the Remote Desktop Client could allow an unauthorized user to establish a remote desktop session to another system. The system must be configured to prevent users from saving... |
| V-73603 | Medium | The Windows Remote Management (WinRM) service must not store RunAs credentials. | Storage of administrative credentials could allow unauthorized access. Disallowing the storage of RunAs credentials for Windows Remote Management will prevent them from being used with... |
| V-90359 | Medium | Windows 2016 must be configured to audit Object Access - Other Object Access Events successes. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73601 | Medium | The Windows Remote Management (WinRM) service must not allow unencrypted traffic. | Unencrypted remote access to a system can allow sensitive information to be compromised. Windows remote management connections must be encrypted to prevent this.
Satisfies:... |
| V-73711 | Medium | User Account Control must, at a minimum, prompt administrators for consent on the secure desktop. | User Account Control (UAC) is a security mechanism for limiting the elevation of privileges, including administrative accounts, unless authorized. This setting configures the elevation... |
| V-73453 | Medium | Windows Server 2016 must be configured to audit Logon/Logoff - Logon failures. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73451 | Medium | Windows Server 2016 must be configured to audit Logon/Logoff - Logon successes. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73455 | Medium | Windows Server 2016 must be configured to audit Logon/Logoff - Special Logon successes. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73591 | Medium | PowerShell script block logging must be enabled. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73597 | Medium | The Windows Remote Management (WinRM) client must not use Digest authentication. | Digest authentication is not as strong as other options and may be subject to man-in-the-middle attacks. Disallowing Digest authentication will reduce this potential. |
| V-73595 | Medium | The Windows Remote Management (WinRM) client must not allow unencrypted traffic. | Unencrypted remote access to a system can allow sensitive information to be compromised. Windows remote management connections must be encrypted to prevent this.
Satisfies:... |
| V-73699 | Medium | Users must be required to enter a password to access private keys stored on the computer. | If the private key is discovered, an attacker can use the key to authenticate as an authorized user and gain access to the network infrastructure.
The cornerstone of the PKI is the private key... |
| V-73513 | Medium | Windows Server 2016 virtualization-based security must be enabled with the platform security level configured to Secure Boot or Secure Boot with DMA Protection. | Virtualization Based Security (VBS) provides the platform for the additional security features Credential Guard and virtualization-based protection of code integrity. Secure Boot is the minimum... |
| V-73297 | Medium | The TFTP Client must not be installed. | Unnecessary services increase the attack surface of a system. Some of these services may not support required levels of authentication or encryption or may provide unauthorized access to the system. |
| V-73295 | Medium | The Telnet Client must not be installed. | Unnecessary services increase the attack surface of a system. Some of these services may not support required levels of authentication or encryption or may provide unauthorized access to the system. |
| V-73291 | Medium | The Peer Name Resolution Protocol must not be installed. | Unnecessary services increase the attack surface of a system. Some of these services may not support required levels of authentication or encryption or may provide unauthorized access to the system. |
| V-73359 | Medium | Kerberos user logon restrictions must be enforced. | This policy setting determines whether the Kerberos Key Distribution Center (KDC) validates every request for a session ticket against the user rights policy of the target computer. The policy is... |
| V-73293 | Medium | Simple TCP/IP Services must not be installed. | Unnecessary services increase the attack surface of a system. Some of these services may not support required levels of authentication or encryption or may provide unauthorized access to the system. |
| V-73557 | Medium | The System event log size must be configured to 32768 KB or greater. | Inadequate log size will cause the log to fill up quickly. This may prevent audit events from being recorded properly and require frequent attention by administrative personnel. |
| V-73693 | Medium | Windows Server 2016 must be configured to at least negotiate signing for LDAP client signing. | This setting controls the signing requirements for LDAP clients. This must be set to "Negotiate signing" or "Require signing", depending on the environment and type of LDAP server in use. |
| V-73695 | Medium | Session security for NTLM SSP-based clients must be configured to require NTLMv2 session security and 128-bit encryption. | Microsoft has implemented a variety of security support providers for use with Remote Procedure Call (RPC) sessions. All of the options must be enabled to ensure the maximum security level. |
| V-73565 | Medium | File Explorer shell protocol must run in protected mode. | The shell protocol will limit the set of folders that applications can open when run in protected mode. Restricting files an application can open to a limited set of folders increases the security... |
| V-73647 | Medium | The required legal notice must be configured to display before console logon. | Failure to display the logon banner prior to a logon attempt will negate legal proceedings resulting from unauthorized access to system resources.
Satisfies: SRG-OS-000023-GPOS-00006,... |
| V-73801 | Medium | The Restore files and directories user right must only be assigned to the Administrators group. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
Accounts with the "Restore files and directories" user right can circumvent file and... |
| V-73679 | Medium | Services using Local System that use Negotiate when reverting to NTLM authentication must use the computer identity instead of authenticating anonymously. | Services using Local System that use Negotiate when reverting to NTLM authentication may gain unauthorized access if allowed to authenticate anonymously versus using the computer identity. |
| V-73577 | Medium | Attachments must be prevented from being downloaded from RSS feeds. | Attachments from RSS feeds may not be secure. This setting will prevent attachments from being downloaded from RSS feeds. |
| V-73571 | Medium | Remote Desktop Services must always prompt a client for passwords upon connection. | This setting controls the ability of users to supply passwords automatically as part of their remote desktop connection. Disabling this setting would allow anyone to use the stored credentials in... |
| V-73807 | Medium | The Smart Card removal option must be configured to Force Logoff or Lock Workstation. | Unattended systems are susceptible to unauthorized use and must be locked. Configuring a system to lock when a smart card is removed will ensure the system is inaccessible when unattended. |
| V-73673 | Medium | Windows Server 2016 must be configured to prevent anonymous users from having the same permissions as the Everyone group. | Access by anonymous users must be restricted. If this setting is enabled, anonymous users have the same rights and permissions as the built-in Everyone group. Anonymous users must not have these... |
| V-73809 | Medium | Windows Server 2016 built-in guest account must be disabled. | A system faces an increased vulnerability threat if the built-in guest account is not disabled. This is a known account that exists on all Windows systems and cannot be deleted. This account is... |
| V-73701 | Medium | Windows Server 2016 must be configured to use FIPS-compliant algorithms for encryption, hashing, and signing. | This setting ensures the system uses algorithms that are FIPS-compliant for encryption, hashing, and signing. FIPS-compliant algorithms meet specific standards established by the U.S. Government... |
| V-73285 | Medium | Windows Server 2016 must automatically remove or disable emergency accounts after the crisis is resolved or within 72 hours. | Emergency administrator accounts are privileged accounts established in response to crisis situations where the need for rapid account activation is required. Therefore, emergency account... |
| V-73677 | Medium | Remote calls to the Security Account Manager (SAM) must be restricted to Administrators. | The Windows Security Account Manager (SAM) stores users' passwords. Restricting Remote Procedure Call (RPC) connections to the SAM to Administrators helps protect those credentials. |
| V-73579 | Medium | Basic authentication for RSS feeds over HTTP must not be used. | Basic authentication uses plain-text passwords that could be used to compromise a system. Disabling Basic authentication will reduce this potential. |
| V-73719 | Medium | User Account Control must run all administrators in Admin Approval Mode, enabling UAC. | User Account Control (UAC) is a security mechanism for limiting the elevation of privileges, including administrative accounts, unless authorized. This setting enables UAC.
Satisfies:... |
| V-73457 | Medium | Windows Server 2016 must be configured to audit Object Access - Removable Storage successes. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-90361 | Medium | Windows 2016 must be configured to audit Object Access - Other Object Access Events failures. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73363 | Medium | The Kerberos user ticket lifetime must be limited to 10 hours or less. | In Kerberos, there are two types of tickets: Ticket Granting Tickets (TGTs) and Service Tickets. Kerberos tickets have a limited lifetime so the time an attacker has to implement an attack is... |
| V-73683 | Medium | PKU2U authentication using online identities must be prevented. | PKU2U is a peer-to-peer authentication protocol. This setting prevents online identities from authenticating to domain-joined systems. Authentication will be centrally managed with Windows user accounts. |
| V-73681 | Medium | NTLM must be prevented from falling back to a Null session. | NTLM sessions that are allowed to fall back to Null (unauthenticated) sessions may gain unauthorized access. |
| V-73449 | Medium | Windows Server 2016 must be configured to audit Logon/Logoff - Logoff successes. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73765 | Medium | The Deny log on as a service user right must be configured to include no accounts or groups (blank) on domain controllers. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
The "Deny log on as a service" user right defines accounts that are denied logon as a... |
| V-73283 | Medium | Windows Server 2016 must automatically remove or disable temporary user accounts after 72 hours. | If temporary user accounts remain active when no longer needed or for an excessive period, these accounts may be used to gain unauthorized access. To mitigate this risk, automated termination of... |
| V-73767 | Medium | The Deny log on as a service user right on member servers must be configured to prevent access from highly privileged domain accounts on domain systems. No other groups or accounts must be assigned this right. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
The "Deny log on as a service" user right defines accounts that are denied logon as a... |
| V-73281 | Medium | Windows Server 2016 must employ automated mechanisms to determine the state of system components with regard to flaw remediation using the following frequency: continuously, where Host Based Security System (HBSS) is used; 30 days, for any additional internal network scans not covered by HBSS; and annually, for external scans by Computer Network Defense Service Provider (CNDSP). | Without the use of automated mechanisms to scan for security flaws on a continuous and/or periodic basis, the operating system or other system components may remain vulnerable to the exploits... |
| V-73761 | Medium | The Deny log on as a batch job user right on domain controllers must be configured to prevent unauthenticated access. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
The "Deny log on as a batch job" user right defines accounts that are prevented from... |
| V-73287 | Medium | The Fax Server role must not be installed. | Unnecessary services increase the attack surface of a system. Some of these services may not support required levels of authentication or encryption or may provide unauthorized access to the system. |
| V-73763 | Medium | The Deny log on as a batch job user right on member servers must be configured to prevent access from highly privileged domain accounts on domain systems and from unauthenticated access on all systems. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
The "Deny log on as a batch job" user right defines accounts that are prevented from... |
| V-73697 | Medium | Session security for NTLM SSP-based servers must be configured to require NTLMv2 session security and 128-bit encryption. | Microsoft has implemented a variety of security support providers for use with Remote Procedure Call (RPC) sessions. All of the options must be enabled to ensure the maximum security level. |
| V-73361 | Medium | The Kerberos service ticket maximum lifetime must be limited to 600 minutes or less. | This setting determines the maximum amount of time (in minutes) that a granted session ticket can be used to access a particular service. Session tickets are used only to authenticate new... |
| V-73551 | Medium | Windows Telemetry must be configured to Security or Basic. | Some features may communicate with the vendor, sending system information or downloading data or components for the feature. Limiting this capability will prevent potentially sensitive information... |
| V-73289 | Medium | The Microsoft FTP service must not be installed unless required. | Unnecessary services increase the attack surface of a system. Some of these services may not support required levels of authentication or encryption. |
| V-73769 | Medium | The Deny log on locally user right on domain controllers must be configured to prevent unauthenticated access. | Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
The "Deny log on locally" user right defines accounts that are prevented from logging... |
| V-73511 | Medium | Command line data must be included in process creation events. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73367 | Medium | The computer clock synchronization tolerance must be limited to 5 minutes or less. | This setting determines the maximum time difference (in minutes) that Kerberos will tolerate between the time on a client's clock and the time on a server's clock while still considering the two... |
| V-73459 | Medium | Windows Server 2016 must be configured to audit Object Access - Removable Storage failures. | Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks.... |
| V-73387 | Low | The directory service must be configured to terminate LDAP-based network connections to the directory server after 5 minutes of inactivity. | The failure to terminate inactive network connections increases the risk of a successful attack on the directory server. The longer an established session is in progress, the more time an attacker... |
| V-73543 | Low | The Application Compatibility Program Inventory must be prevented from collecting data and sending the information to Microsoft. | Some features may communicate with the vendor, sending system information or downloading data or components for the feature. Turning off this capability will prevent potentially sensitive... |
| V-73499 | Low | Internet Protocol version 6 (IPv6) source routing must be configured to the highest protection level to prevent IP source routing. | Configuring the system to disable IPv6 source routing protects against spoofing. |
| V-73307 | Low | The time service must synchronize with an appropriate DoD time source. | The Windows Time Service controls time synchronization settings. Time synchronization is essential for authentication and auditing purposes. If the Windows Time Service is used, it must... |
| V-73257 | Low | Non-administrative accounts or groups must only have print permissions on printer shares. | Windows shares are a means by which files, folders, printers, and other resources can be published for network users to access. Improper configuration can permit access to devices and data beyond... |
| V-73705 | Low | The default permissions of global system objects must be strengthened. | Windows systems maintain a global list of shared system resources such as DOS device names, mutexes, and semaphores. Each type of object is created with a default Discretionary Access Control List... |
| V-73505 | Low | Windows Server 2016 must be configured to ignore NetBIOS name release requests except from WINS servers. | Configuring the system to ignore name release requests, except from WINS servers, prevents a denial of service (DoS) attack. The DoS consists of sending a NetBIOS name release request to the... |
| V-73501 | Low | Source routing must be configured to the highest protection level to prevent Internet Protocol (IP) source routing. | Configuring the system to disable IP source routing protects against spoofing. |
| V-73503 | Low | Windows Server 2016 must be configured to prevent Internet Control Message Protocol (ICMP) redirects from overriding Open Shortest Path First (OSPF)-generated routes. | Allowing ICMP redirect of routes can lead to traffic not being routed properly. When disabled, this forces ICMP to be routed via the shortest path first. |
| V-90357 | Low | Windows 2016 systems must have Unified Extensible Firmware Interface (UEFI) firmware and be configured to run in UEFI mode, not Legacy BIOS. | UEFI provides additional security features in comparison to legacy BIOS firmware, including Secure Boot. UEFI is required to support additional security features in Windows Server 2016, including... |
| V-90355 | Low | Secure Boot must be enabled on Windows Server 2016 systems. | Secure Boot is a standard that ensures systems boot only to a trusted operating system. Secure Boot is required to support additional security features in Windows Server 2016, including... |
| V-73563 | Low | Turning off File Explorer heap termination on corruption must be disabled. | Legacy plug-in applications may continue to function when a File Explorer session has become corrupt. Disabling this feature will prevent this. |
| V-73649 | Low | The Windows dialog box title for the legal banner must be configured with the appropriate text. | Failure to display the logon banner prior to a logon attempt will negate legal proceedings resulting from unauthorized access to system resources.
Satisfies: SRG-OS-000023-GPOS-00006,... |
