| V-1073 | High | Systems must be at supported service packs (SP) or releases levels. | Systems at unsupported service packs or releases will not receive security updates for new vulnerabilities and leaves them subject to exploitation. Systems must be maintained at a service pack... |
| V-34974 | High | The Windows Installer Always install with elevated privileges 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-6834 | High | Named Pipes and Shares can be accessed anonymously. | This is a Category 1 finding because of the potential for gaining unauthorized system access.
Pipes are internal system communications processes. They are identified internally by ID numbers... |
| V-1159 | High | The Recovery Console option is set to permit automatic logon to the system. | This is a Category 1 finding because if this option is set, the Recovery Console does not require you to provide a password and will automatically log on to the system, giving Administrator access... |
| V-1153 | High | The Send download LanMan compatible password option is not set to Send NTLMv2 response only\refuse LM. | The Kerberos v5 authentication protocol is the default for authentication of users who are logging on to domain accounts. NTLM is retained in later Windows versions for compatibility with... |
| V-2374 | High | The system is configured to autoplay removable media. | Autoplay begins reading from a drive as soon as you insert media in the drive. As a result, the setup file of programs and the music on audio media starts immediately. By default, Autoplay is... |
| V-1093 | High | Anonymous shares are not restricted. | This is a Category 1 finding because it allows anonymous logon users (null session connections) to list all account names and enumerate all shared resources, thus providing a map of potential... |
| V-1145 | High | Automatic logons must be disabled. | Allowing a system to automatically log on when the machine is booted could give access to any unauthorized individual who restarts the computer. Automatic logon with administrator privileges would... |
| V-3338 | High | Unauthorized named pipes are accessible with anonymous credentials. | This is a Category 1 finding because the potential for gaining unauthorized system access. Pipes are internal system communications processes. They are identified internally by ID numbers that... |
| V-3339 | High | Unauthorized registry paths are remotely accessible. | This is a Category 1 finding because it could give unauthorized individuals access to the Registry.
It controls which registry paths are accessible from a remote computer. |
| V-18010 | High | Unapproved Users have access to Debug programs. | This is a Category 1 finding as it provides access to the kernel with complete access to sensitive and critical operating system components. |
| V-12780 | High | The Synchronize directory service data user right must be configured to include no accounts or groups (blank). | A Windows account with the "Synchronize directory service data" right has the ability to read all information in the AD database. This bypasses the object access permissions that would otherwise... |
| V-3343 | High | Solicited Remote Assistance is allowed. | This setting controls whether or not solicited remote assistance is allowed from this computer. Solicited assistance is help that is specifically requested by the user. This is a Category 1... |
| V-3341 | High | Remote control of a Terminal Service session is allowed. | This setting is used to control the rules for remote control of Terminal Services user sessions. This is a Category 1 finding because remote control of sessions could permit an unauthorized user... |
| V-3340 | High | Unauthorized shares can be accessed anonymously. | This is a Category 1 finding because the potential for gaining unauthorized system access. Any shares listed can be accessed by any network user. This could lead to the exposure or corruption of... |
| V-3344 | High | The use of local accounts with blank passwords is not restricted to console logons only. | This is a Category 1 finding because no accounts with blank passwords should exist on a system. The password policy should prevent this from occurring. However, if a local account with a blank... |
| V-4443 | High | Unauthorized registry paths and sub-paths are remotely accessible. | The registry is a database for computer configuration information, much of which is sensitive. An attacker could use this to facilitate unauthorized activities. To reduce the risk of this... |
| V-1155 | High | 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 from the Network" right defines the accounts that are prevented from... |
| V-1102 | High | Unauthorized users are granted right to Act as part of the operating system. | This is a Category 1 finding because users and user groups that are assigned this right can bypass all security protective mechanisms that apply to all users, including administrators. Accounts... |
| V-17900 | High | Disallow AutoPlay/Autorun from Autorun.inf | This registry key will prevent the autorun.inf from executing commands. |
| V-3379 | High | The system is configured to store the LAN Manager hash of the password in the SAM. | This setting controls whether or not a LAN Manager hash of the password is stored in the SAM the next time the password is changed. The LAN Manager hash is a weak encryption algorithm and there... |
| V-3385 | Medium | The system is configured to allow case insensitivity. | This setting controls the behavior of non-Windows subsystems when dealing with the case of arguments or commands. Case sensitivity could lead to the access of files or commands that should be... |
| V-3384 | Medium | The system is not configured to make the object creator the owner of objects created by administrators. | Either the object creator or the Administrators group owns objects created by members of the Administrators group. In order to ensure accurate auditing and proper accountability, the default... |
| V-3383 | Medium | The system is not configured to use FIPS compliant Algorithms for Encryption, Hashing, and Signing. | This setting ensures that the system uses algorithms that are FIPS compliant for encryption, hashing, and signing. FIPS compliant algorithms meet specific standards established by the U.S.... |
| V-3381 | Medium | The system is not configured to recommended LDAP client signing requirements. | This setting controls the signing requirements for LDAP clients. This setting should be set to Negotiate signing or Require signing depending on the environment and type of LDAP server in use. |
| V-3380 | Medium | The system is not configured to force users to log off when their allowed logon hours expire. | This setting controls whether or not users are forced to log off when their allowed logon hours expire. If logon hours are set for users, then this should be enforced. |
| V-3460 | Medium | Terminal Services is not configured to disconnect clients when time limits are exceeded. | This setting, which is located under the Sessions section of the Terminal Services configuration option, controls whether or not clients are forcefully disconnected if their terminal services time... |
| V-3469 | Medium | The system is configured to prevent background refresh of Group Policy. | If this setting is enabled, then Group Policy settings are not refreshed while a user is currently logged on. This could lead to instances when a user does not have the latest changes to a policy... |
| V-15823 | Medium | Remove Software Certificate Installation Files | This check verifies that software certificate installation files have been removed from a system. |
| V-3375 | Medium | Domain Controller authentication is not required to unlock the workstation. | This setting controls the behavior of the system when you attempt to unlock the workstation. If this setting is enabled, the system will pass the credentials to the domain controller (if in a... |
| V-1164 | Medium | Outgoing secure channel traffic is not signed when possible. | 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, all... |
| V-1166 | Medium | The Windows SMB client is not enabled to perform SMB packet signing when possible. | If this policy is enabled, it causes the Windows Server Message Block (SMB) client to perform SMB packet signing when communicating with an SMB server that is enabled or required to perform SMB... |
| V-1163 | Medium | Outgoing secure channel traffic is not encrypted when possible. | 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-1162 | Medium | The Windows SMB server is not enabled to perform SMB packet signing when possible. | If this policy is enabled, it causes the Windows Server Message Block (SMB) server to perform SMB packet signing. |
| V-3471 | Medium | The system is configured to automatically forward error information. | This setting controls the reporting of errors to Microsoft and, if defined, a corporate error reporting site. This does not interfere with the reporting of errors to the local user. Since the... |
| V-3470 | Medium | The system is configured to allow unsolicited remote assistance offers. | This setting controls whether unsolicited offers of help to this computer are allowed. The list of users allowed to offer remote assistance to this system is accessed by pressing the Helpers button. |
| V-1089 | 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. |
| V-3479 | Medium | The system is not configured to use Safe DLL Search Mode. | The default search behavior, when an application calls a function in a Dynamic Link Library (DLL), is to search the current directory followed by the directories contained in the systems path... |
| V-3478 | Medium | The system is configured to allow installation of printers using kernel-mode drivers. | Kernel-mode drivers are drivers that operate in kernel mode. Kernel mode allows virtually unlimited access to hardware and memory. A poorly written kernel driver may cause system instability and... |
| V-1080 | Medium | File-auditing configuration does not meet minimum requirements. | Improper modification of the core system files can render a system inoperable. Further, modifications to these system files can have a significant impact on the security configuration of the... |
| V-6850 | Medium | Auditing must be configured as required. | 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-6836 | Medium | For systems utilizing a logon ID as the individual identifier, passwords must be a minimum of 14 characters in length. | 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 and... |
| V-6832 | Medium | The Windows Server SMB client is not enabled to always perform SMB packet signing. | If this policy is enabled, it causes the Windows Server Message Block (SMB) client to perform SMB packet signing when communicating with an SMB server that is enabled or required to perform SMB... |
| V-6833 | Medium | The Windows Server SMB server is not enabled to always perform SMB packet signing. | If this policy is enabled, it causes the Windows Server Message Block (SMB) server to always perform SMB packet signing. |
| V-6831 | Medium | Outgoing secure channel traffic is not encrypted or signed. | 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-14262 | Medium | IPv6 must be disabled until a deliberate transition strategy has been implemented. | Any nodes’ interface with IPv6 enabled by default presents a potential risk of traffic being transmitted or received without proper risk mitigation strategy and is therefore, a serious security concern. |
| V-1154 | Medium | Ctrl+Alt+Del security attention sequence is Disabled. | Disabling the Ctrl+Alt+Del security attention sequence can compromise system security. Because only Windows responds to the Ctrl+Alt+Del security sequence, you can be assured that any passwords... |
| V-1157 | Medium | The Smart Card removal option is set to take no action. | Determines what should happen when the smart card for a logged-on user is removed from the smart card reader.
The options are:
- No Action
- Lock Workstation
- Force Logoff |
| V-1099 | Medium | Lockout duration does not meet minimum requirements. | This parameter specifies the amount of time that must pass before a locked-out account is automatically unlocked by the system. |
| V-1098 | Medium | Time before bad-logon counter is reset does not meet minimum requirements. | This parameter specifies the amount of time that must pass between two successive login attempts to ensure that a lockout will occur. The smaller this value is, the less effective the account... |
| V-2373 | Medium | The Server Operators group must have the ability to schedule jobs by means of the AT command disabled. | This policy controls the ability of members of the local Server Operators group to schedule AT jobs. If disabled, only administrators can schedule jobs that use AT commands. Unlike Scheduled Tasks... |
| V-2372 | Medium | Reversible password encryption is not disabled. | Storing passwords using reversible encryption is essentially the same as storing clear-text versions of the passwords. For this reason, this policy should never be enabled. |
| V-2377 | Medium | The Kerberos service ticket maximum lifetime must meet minimum standards. | 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-2376 | Medium | The Kerberos policy option must be configured to enforce user logon restrictions. | 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-3349 | Medium | Windows Messenger (MSN Messenger, .NET messenger) is run at system startup. | This setting prevents the automatic launch of Windows Messenger at user logon.
Instant Messaging clients must be in compliance of with the Instant Messaging STIG. Windows Messenger should not... |
| V-1097 | Medium | Number of allowed bad-logon attempts does not meet minimum requirements. | 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-3382 | Medium | The system is not configured to meet the minimum requirement for session security for NTLM SSP based Clients. | Microsoft has implemented a variety of security support providers for use with RPC sessions. In a homogenous Windows environment, all of the options should be enabled and testing should be... |
| V-3372 | Medium | The system can be removed from the docking station without logging on first. | This setting controls the ability to undock the system without having to log on. Since the removal of a computer should be controlled, users should have to log on before undocking the computer to... |
| V-3376 | Medium | The system is configured to permit storage of credentials or .NET Passports. | This setting controls the storage of authentication credentials or .NET passports on the local system. Such credentials should never be stored on the local machine as that may lead to account compromise. |
| V-3377 | Medium | The system is configured to give anonymous users Everyone rights. | This setting helps define the permissions that anonymous users have. If this setting is enabled then anonymous users have the same rights and permissions as the built-in Everyone group. ... |
| V-3374 | Medium | The system is not configured to require a strong session key. | This setting controls the required strength of a session key. |
| V-3378 | Medium | The system is not configured to use the Classic security model. | Windows includes two network-sharing security models - Classic and Guest only. With the classic model, local accounts must be password protected; otherwise, anyone can use guest user accounts to... |
| V-1171 | Medium | Ejection of removable NTFS media is not restricted to Administrators. | Removable hard drives can be formatted and ejected by others who are not members of the Administrators Group, if they are not properly configured. Formatting and ejecting removable NTFS media... |
| V-1141 | Medium | Unencrypted password is sent to 3rd party SMB Server. | 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-3459 | Medium | Terminal Services is not configured to allow only the original client to reconnect. | This setting, which is located under the Sessions section of the Terminal Services configuration option, controls whether a different client may be used to resume a disconnected session. Only the... |
| V-3458 | Medium | Terminal Services idle session time limit does not meet the requirement. | This setting controls how long a session may be idle before it is automatically disconnected from the server. Users should disconnect if they plan on being away from their terminals for extended... |
| V-3450 | Medium | Terminal Services is not configured to limit the number of connections. | This setting limits the number of simultaneous connections allowed to the terminal server. By default, unlimited connections are allowed. Allowing unlimited connections allows a potential DoS... |
| V-3457 | Medium | Terminal Services is not configured to set a time limit for disconnected sessions. | This setting controls how long a session will remain open if it is unexpectedly terminated. Such sessions should be terminated as soon as possible. |
| V-3456 | Medium | Terminal Services is not configured to delete temporary folders. | This setting, which is located under the Temporary Folders section of the Terminal Services configuration option, controls the deletion of the temporary folders when the session is terminated. ... |
| V-3455 | Medium | Terminal Services is configured to use a common temporary folder for all sessions. | This setting, which is located under the Temporary Folders section of the Terminal Services configuration option, controls the use of per session temporary folders or of a communal temporary... |
| V-3454 | Medium | Terminal Services is not configured with the client connection encryption set to the required level. | Remote connections must be encrypted to prevent interception of data or sensitive information. Selecting “High Level” will ensure encryption of Terminal Services sessions in both directions. |
| V-4407 | Medium | Domain Controllers must require LDAP 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-3369 | Medium | Restricted accounts are not disabled. | Several new accounts are created as part of the default installation. As these accounts are well known they may represent prime attack targets. To help prevent attacks using the well-known... |
| V-1139 | Medium | The option to prevent the password in dial-up networking from being saved is not enabled. | The default Windows configuration enables the option to save the password used to gain access to a remote server using the dial-up networking feature. With this option enabled, an unauthorized... |
| V-14247 | Medium | Terminal Services / Remote Desktop Service - Prevent password saving in the Remote Desktop Client | This check verifies that the system is configured to prevent Users from saving passwords in the Remote Desktop Client. |
| V-1114 | Medium | The built-in guest account has not been renamed. | A system faces an increased vulnerability threat if the built-in guest account is not renamed or disabled. The built-in guest account is a known user account on all Windows systems, and as... |
| V-1115 | Medium | The built-in administrator account has not been renamed. | The built-in administrator account is a well known account. Renaming the account to an unidentified name improves the protection of this account and the system. |
| V-3426 | Medium | The system is configured to allow remote desktop sharing through NetMeeting. | Remote desktop sharing enables several users to interact and control one desktop. This could allow unauthorized users to control the system. Remote desktop sharing should be disabled. |
| V-3480 | Medium | Media Player must be configured to prevent automatic checking for updates. | Uncontrolled system updates can introduce issues to a system. The automatic check for updates performed by Windows Media Player must be disabled to ensure a constant platform and to prevent the... |
| V-1113 | Medium | The built-in guest account is not disabled. | A system faces an increased vulnerability threat if the built-in guest account is not disabled. This account is a known account that exists on all Windows systems and cannot be deleted. This... |
| V-3348 | Medium | The user is allowed to launch Windows Messenger (MSN Messenger, .NET Messenger). | This setting prevents the Windows Messenger client from being run.
Instant Messaging clients must be in compliance of with the Instant Messaging STIG. Windows Messenger should not be active on... |
| V-3342 | Medium | The computer does not wait for the network at computer startup. | The setting determines if Windows waits for complete network initialization before allowing the user to log on. Part of this initialization is the application of Group Policy. This may permit a... |
| V-2380 | Medium | The Kerberos policy option Maximum tolerance for computer clock synchronization must be set to a maximum of 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-1118 | Medium | Event log sizes do not meet minimum requirements. | Inadequate log size will cause the log to fill up quickly and require frequent clearing by administrative personnel. |
| V-4448 | Medium | Group Policy objects are not reprocessed if they have not changed. | Enabling this setting and then selecting the "Process even if the Group Policy objects have not changed" option ensures that the policies will be reprocessed even if none have been changed. This... |
| V-4447 | Medium | The Terminal Server does not require secure RPC communication. | Allowing unsecure RPC communication exposes the server 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-4446 | Medium | Software certificate restriction policies are not enforced. | Software restriction policies help to protect users and computers from executing unauthorized code such as viruses and Trojans horses.
|
| V-3666 | Medium | The system is not configured to meet the minimum requirement for session security for NTLM SSP based Servers. | Microsoft has implemented a variety of security support providers for use with RPC sessions. In a homogenous Windows environment, all of the options should be enabled and testing should be... |
| V-1103 | Medium | User rights assignments must meet minimum requirements. | Inappropriate granting of user and advanced user rights can provide system, administrative, and other high level capabilities not required by the normal user. |
| V-1107 | Medium | Password uniqueness does not meet minimum requirements. | A system is more vulnerable to unauthorized access when system users recycle the same password several times without being required to change a password to a unique password on a regularly... |
| V-1105 | Medium | Minimum password age does not meet minimum requirements. | 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... |
| V-1104 | Medium | Maximum password age does not meet minimum requirements. | The longer a password is in use, the greater the opportunity for someone to gain unauthorized knowledge of the passwords. Further, scheduled changing of passwords hinders the ability of... |
| V-4444 | Medium | Users must enter a password to access private keys. | Configuring this setting so that users must provide a password (distinct from their domain password) every time they use a key makes it more difficult for an attacker to access locally stored user... |
| V-3449 | Medium | Terminal Services is not configured to limit users to one remote session. | This setting limits users to one remote session. It is possible, if this setting is disabled, for users to establish multiple sessions. |
| V-26483 | 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" right defines accounts that are prevented from... |
| V-26486 | Medium | The Deny log on through Terminal Services user right on domain controllers must prevent all access if TS is not used by the organization. If TS is used, it 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 Terminal Services" right defines the accounts that are... |
| V-26484 | Medium | The Deny log on as a service user right will be configured to include no one (blank). | Inappropriate granting of user rights can provide system, administrative, and other high level capabilities.
The "Deny log on as a service" right defines accounts that are denied log on as a... |
| V-26485 | 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" right defines accounts that are prevented from logging on... |
| V-2379 | Medium | The Kerberos policy option Maximum lifetime for user ticket renewal must be configured for a maximum of 7 days or less. | This setting determines the period of time (in days) during which a users TGT may be renewed. This security configuration limits the amount of time an attacker has to crack the TGT and gain access. |
| V-2378 | Medium | The Kerberos policy option maximum lifetime for user ticket must be set to a maximum of 10 hours or less. | In Kerberos, there are 2 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-1075 | Low | The system allows shutdown from the logon dialog box. | Displaying the shutdown button may allow individuals to shut down a system anonymously. Only authenticated users should be allowed to shut down the system. Preventing display of this button in... |
| V-1173 | Low | The default permissions of Global system objects are not increased. | Windows system maintains a global list of shared system resources such as DOS device names, mutexes, and semaphores. Each type of object is created with a default DACL that specifies who can... |
| V-1165 | Low | The computer account password is prevented from being reset. | As a part of Windows security, computer account passwords are changed automatically. Enabling this policy to disable automatic password changes can make the system more vulnerable to malicious... |
| V-1160 | Low | The unsigned driver installation behavior is improperly set. | Determines what should happen when an attempt is made to install a device driver (by means of the Windows device installer) that has not been certified by the Windows Hardware Quality Lab... |
| V-11806 | Low | The system is configured to allow the display of the last user name on the logon screen. | The user name of the last user to log onto a system will not be displayed. This eliminates half of the Userid/Password equation that an unauthorized person would need to log on. |
| V-1158 | Low | The Recovery Console SET command is enabled. | Enabling this option enables the Recovery Console SET command, which allows you to set Recovery Console environment variables. This permits floppy copy and access to all drives and folders. |
| V-1150 | Low | The built-in Microsoft password filter is not enabled. | The use of complex passwords increases their strength against guessing. This policy setting configures the system to verify that newly-created passwords conform to the Windows password complexity policy. |
| V-1151 | Low | Print driver installation privilege is not restricted to administrators. | By default, the print spooler allows any user to add and to delete printer drivers on the local system. This capability should be restricted to authorized personnel. |
| V-1174 | Low | Amount of idle time required before suspending a session is improperly set. | Administrators should use this setting to control when a computer disconnects an inactive SMB session. If client activity resumes, the session is automatically reestablished. This protects... |
| V-1091 | Low | System does not halt once an event log has reached its maximum size. | If the security log is full, it becomes possible for some events to not be logged. Selecting this option will halt the computer when the log is full to prevent losing any events. If the system... |
| V-1090 | Low | Caching of logon credentials is not 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-3373 | Low | The maximum age for machine account passwords is not set to requirements. | This setting controls the maximum password age that a machine account may have. This setting should be set to no more than 30 days, ensuring the machine changes its password monthly. |
| V-26359 | Low | The Windows dialog box title for the legal banner must be configured. | Failure to display the logon banner prior to a logon attempt will negate legal proceedings resulting from unauthorized access to system resources. |
| V-4408 | Low | The domain controller 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-1136 | Low | Users must be forcibly disconnected when their logon hours expire. | Users must not be permitted to remain logged on to the network after they have exceeded their permitted logon hours. In many cases, this indicates that a user forgot to log off before leaving for... |
| V-4438 | Low | TCP data retransmissions are not controlled. | In a SYN flood attack, the attacker sends a continuous stream of SYN packets to a server, and the server leaves the half-open connections open until it is overwhelmed and no longer is able to... |
| V-4437 | Low | TCP connection response retransmissions are not controlled. | In a SYN flood attack, the attacker sends a continuous stream of SYN packets to a server, and the server leaves the half-open connections open until it is overwhelmed and no longer is able to... |
| V-4111 | Low | The system is configured to redirect ICMP. | When disabled, forces ICMP to be routed via shortest path first. |
| V-4110 | Low | The system is configured to allow IP source routing. | Protects against IP source routing spoofing. |
| V-4108 | Low | The system does not generate an audit event when the audit log reaches a percent full threshold. | When the audit log reaches a given percent full, an audit event is written to the security log. The event ID is 523 and is recorded as a success audit under the category of System. This option may... |
| V-4109 | Low | The system must be configured to disable dead gateway detection. | Dead gateway detection allows switching to a backup gateway if a number of connections to a gateway are experiencing difficulty. An attacker could force internal traffic to be directed to a... |
| V-4113 | Low | The system is configured for a greater keep-alive time than recommended. | Controls how often TCP sends a keep-alive packet in attempting to verify that an idle connection is still intact. |
| V-4112 | Low | The system is configured to detect and configure default gateway addresses. | Enables or disables the Internet Router Discovery Protocol (IRDP) used to detect and configure Default Gateway addresses on the computer. |
| V-4117 | Low | The system is configured to allow SYN attacks. | Adjusts retransmission of TCP SYN-ACKs. When enabled, connection responses time out more quickly in the event of a SYN DoS attack. |
| V-4116 | Low | The system is configured to allow name-release attacks. | Prevents a denial-of-service (DoS) attack against a WINS server. The DoS consists of sending a NetBIOS Name Release Request to the server for each entry in the servers cache, causing a response... |
| V-4442 | Low | This check verifies that Windows is configured to have password protection take effect within a limited time frame when the screen saver becomes active. | Allowing more than several seconds makes the computer vulnerable to a potential attack from someone walking up to the console to attempt to log onto the system before the lock takes effect. |
| V-4445 | Low | Optional Subsystems are permitted to operate on the system. | The POSIX subsystem is an Institute of Electrical and Electronic Engineers (IEEE) standard that defines a set of operating system services. The POSIX Subsystem is required if the server supports... |
| V-1172 | Low | Users are not warned in advance that their passwords will expire. | This setting configures the system to display a warning to users telling them how many days are left before their password expires. By giving the user advanced warning, the user has time to... |
