| Finding ID |
Severity |
Title |
Description |
|
V-266095
|
High |
The F5 BIG-IP appliance must set the idle time before automatic logout to five minutes of inactivity except to fulfill documented and validated mission requirements. |
Terminating an idle session within a short time period reduces the window of opportunity for unauthorized personnel to take control of a management session enabled on the console or console port that has been left unattended. In addition, quickly terminating an idle session will also free up resources committed by... |
|
V-266094
|
High |
The F5 BIG-IP appliance must be configured to use DOD approved OCSP responders or CRLs to validate certificates used for PKI-based authentication. |
Once issued by a DOD certificate authority (CA), public key infrastructure (PKI) certificates are typically valid for three years or shorter within the DOD. However, there are many reasons a certificate may become invalid before the prescribed expiration date. For example, an employee may leave or be terminated and still... |
|
V-266085
|
High |
The F5 BIG-IP appliance must be configured to use multifactor authentication (MFA) for interactive logins. |
MFA is when two or more factors are used to confirm the identity of an individual who is requesting access to digital information resources. Valid factors include something the individual knows (e.g., username and password), something the individual has (e.g., a smartcard or token), or something the individual is (e.g.,... |
|
V-266084
|
High |
The F5 BIG-IP appliance must be configured to prohibit the use of all unnecessary and/or nonsecure functions, ports, protocols, and/or services. |
To prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types), organizations must disable unused or unnecessary physical and logical ports/protocols on information systems.
Network devices are capable of providing a wide variety of functions and services. Some of the... |
|
V-266080
|
High |
The F5 BIG-IP appliance must be running an operating system release that is currently supported by the vendor. |
Network devices running an unsupported operating system lack current security fixes required to mitigate the risks associated with recent vulnerabilities. |
|
V-266079
|
High |
The F5 BIG-IP appliance must be configured to use at least two authentication servers to authenticate administrative users. |
Centralized management of authentication settings increases the security of remote and nonlocal access methods. This control is particularly important protection against the insider threat. With robust centralized management, audit records for administrator account access to the organization's network devices can be more readily analyzed for trends and anomalies. The alternative... |
|
V-266075
|
High |
The F5 BIG-IP appliance must generate audit records and send records to redundant central syslog servers that are separate from the appliance. |
Information stored in one location is vulnerable to accidental or incidental deletion or alteration.
Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for... |
|
V-266067
|
High |
The F5 BIG-IP appliance must be configured to assign appropriate user roles or access levels to authenticated users. |
Successful identification and authentication must not automatically give an entity full access to a network device or security domain.
Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset or set of resources. Information systems use access control policies and enforcement mechanisms... |
|
V-266135
|
Medium |
The F5 BIG-IP appliance must be configured to restrict a consistent inbound IP for the entire management session. |
This security measure helps limit the effects of denial-of-service (DoS) attacks by employing anti-session hijacking security safeguards. Session hijacking, also called cookie hijacking, is the exploitation of a valid computer session to gain unauthorized access to an application. The attacker steals (or hijacks) the cookies from a valid user and... |
|
V-266134
|
Medium |
The F5 BIG-IP appliance must be configured to display the Standard Mandatory DOD Notice and Consent Banner when accessing via SSH. |
Display of the DOD-approved use notification before granting access to the network device ensures privacy and security notification verbiage used is consistent with applicable federal laws, Executive Orders, directives, policies, regulations, standards, and guidance.
System use notifications are required only for access via logon interfaces with human users. |
|
V-266096
|
Medium |
The F5 BIG-IP appliance must conduct backups of the configuration at a weekly or organization-defined frequency and store on a separate device. |
Information system backup is a critical step in maintaining data assurance and availability. Information system and security-related documentation contains information pertaining to system configuration and security settings. If this information were not backed up, and a system failure were to occur, the security settings would be difficult to reconfigure quickly... |
|
V-266093
|
Medium |
The F5 BIG-IP appliance must prohibit the use of cached authenticators after eight hours or less. |
Some authentication implementations can be configured to use cached authenticators.
If cached authentication information is out-of-date, the validity of the authentication information may be questionable.
The organization-defined time period must be established for each device depending on the nature of the device; for example, a device with just a few... |
|
V-266092
|
Medium |
The F5 BIG-IP appliance must require that when a password is changed, the characters are changed in at least eight of the positions within the password. |
If the application allows the user to consecutively reuse extensive portions of passwords, this increases the chances of password compromise by increasing the window of opportunity for attempts at guessing and brute-force attacks.
The number of changed characters refers to the number of changes required with respect to the total... |
|
V-266091
|
Medium |
The F5 BIG-IP appliance must enforce password complexity by requiring that at least one special character be used. |
Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks.
Password complexity is one factor of several that determine how long it... |
|
V-266090
|
Medium |
The F5 BIG-IP appliance must enforce password complexity by requiring that at least one numeric character be used. |
Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks.
Password complexity is one factor of several that determine how long it... |
|
V-266089
|
Medium |
The F5 BIG-IP appliance must enforce password complexity by requiring that at least one lowercase character be used. |
Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks.
Password complexity is one factor of several that determine how long it... |
|
V-266088
|
Medium |
The F5 BIG-IP appliance must enforce password complexity by requiring that at least one uppercase character be used. |
Use of a complex passwords helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks.
Password complexity is one factor of several that determine how long it... |
|
V-266087
|
Medium |
The F5 BIG-IP appliance must enforce a minimum 15-character password length. |
Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. Password length is one factor of several that helps to determine strength and how long it takes to crack a password.
The shorter the password, the lower the number... |
|
V-266086
|
Medium |
The F5 BIG-IP appliance must authenticate Network Time Protocol (NTP) sources using authentication that is cryptographically based. |
If NTP is not authenticated, an attacker can introduce a rogue NTP server. This rogue server can then be used to send incorrect time information to network devices, which will make log timestamps inaccurate and affect scheduled actions. NTP authentication is used to prevent this tampering by authenticating the time... |
|
V-266083
|
Medium |
The F5 BIG-IP appliance must obtain its public key certificates from an appropriate certificate policy through an approved service provider. |
For user certificates, each organization obtains certificates from an approved, shared service provider, as required by OMB policy. For federal agencies operating a legacy public key infrastructure cross-certified with the Federal Bridge Certification Authority at medium assurance or higher, this Certification Authority (CA) will suffice. |
|
V-266078
|
Medium |
The F5 BIG-IP appliance must be configured to prevent the installation of patches, service packs, or application components without verification the software component has been digitally signed using a certificate that is recognized and approved by the organization. |
Changes to any software components can have significant effects on the overall security of the network device. Verifying software components have been digitally signed using a certificate that is recognized and approved by the organization ensures the software has not been tampered with and has been provided by a trusted... |
|
V-266077
|
Medium |
The F5 BIG-IP appliance must record time stamps for audit records that can be mapped to Coordinated Universal Time (UTC). |
If time stamps are not consistently applied and there is no common time reference, it is difficult to perform forensic analysis.
Time stamps generated by the application include date and time. Time is commonly expressed in UTC, a modern continuation of Greenwich Mean Time (GMT), or local time with an... |
|
V-266076
|
Medium |
The F5 BIG-IP appliance must be configured to synchronize internal information system clocks using redundant authoritative time sources. |
The loss of connectivity to a particular authoritative time source will result in the loss of time synchronization (free-run mode) and increasingly inaccurate time stamps on audit events and other functions.
Multiple time sources provide redundancy by including a secondary source. Time synchronization is usually a hierarchy; clients synchronize time... |
|
V-266070
|
Medium |
The F5 BIG-IP appliance must be configured to display the Standard Mandatory DOD Notice and Consent Banner upon access to the TMOS User Interface. |
Display of the DOD-approved use notification before granting access to the network device ensures privacy and security notification verbiage used is consistent with applicable federal laws, Executive Orders, directives, policies, regulations, standards, and guidance.
System use notifications are required only for access via logon interfaces with human users. |
|
V-266069
|
Medium |
The F5 BIG-IP appliance must be configured to enforce the limit of three consecutive invalid logon attempts, after which time it must block any login attempt for at least 15 minutes. |
By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-forcing, is reduced. |
|
V-266068
|
Medium |
The F5 BIG-IP appliance must be configured to audit the execution of privileged functions such as accounts additions and changes. |
Misuse of privileged functions, either intentionally or unintentionally by authorized users, or by unauthorized external entities that have compromised information system accounts, is a serious and ongoing concern and can have significant adverse impacts on organizations. Auditing the use of privileged functions is one way to detect such misuse and... |
|
V-266066
|
Medium |
The F5 BIG-IP appliance must be configured with only one local account to be used as the account of last resort in the event the authentication server is unavailable. |
Authentication for administrative (privileged level) access to the device is required at all times. An account can be created on the device's local database for use when the authentication server is down or connectivity between the device and the authentication server is not operable. This account is referred to as... |
|
V-266065
|
Medium |
The F5 BIG-IP appliance must terminate shared/group account credentials when members leave the group. |
A shared/group account credential is a shared form of authentication that allows multiple individuals to access the network device using a single account. If shared/group account credentials are not terminated when individuals leave the group, the user that left the group can still gain access even though they are no... |
|
V-266064
|
Medium |
The F5 BIG-IP appliance must be configured to limit the number of concurrent sessions to the Configuration Utility to 10 or an organization-defined number. |
Device management includes the ability to control the number of administrators and management sessions that manage a device. Limiting the number of allowed administrators and sessions per administrator is helpful in limiting risks related to denial-of-service (DoS) attacks.
This requirement addresses concurrent sessions for administrative accounts and does not address... |
|
V-266074
|
Low |
The F5 BIG-IP appliance must manage local audit storage capacity in accordance with organization-defined audit record storage requirements. |
To ensure network devices have a sufficient storage capacity in which to write the audit logs, they need to be able to allocate audit record storage capacity. The task of allocating audit record storage capacity is usually performed during initial device setup if it is modifiable.
The value for the... |
