I - Mission Critical Sensitive
Rules and Groups employed by this XCCDF Profile
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SRG-APP-000001-NDM-000200
Group -
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 administr...Rule Medium Severity -
SRG-APP-000317-NDM-000282
Group -
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 no...Rule Medium Severity -
SRG-APP-000148-NDM-000346
Group -
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 i...Rule Medium Severity -
SRG-APP-000033-NDM-000212
Group -
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 entit...Rule High Severity -
SRG-APP-000343-NDM-000289
Group -
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...Rule Medium Severity -
SRG-APP-000065-NDM-000214
Group -
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.Rule Medium Severity -
SRG-APP-000068-NDM-000215
Group -
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, Executi...Rule Medium Severity -
SRG-APP-000357-NDM-000293
Group -
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 st...Rule Low Severity -
SRG-APP-000515-NDM-000325
Group -
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 org...Rule High Severity -
F5BI-DM-300036
Group -
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 ...Rule Medium Severity -
SRG-APP-000374-NDM-000299
Group -
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. Tim...Rule Medium Severity -
SRG-APP-000131-NDM-000243
Group -
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 r...Rule Medium Severity -
SRG-APP-000516-NDM-000336
Group -
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 ro...Rule High Severity -
SRG-APP-000516-NDM-000351
Group -
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.Rule High Severity -
SRG-APP-000516-NDM-000344
Group -
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...Rule Medium Severity -
SRG-APP-000142-NDM-000245
Group -
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 o...Rule High Severity -
SRG-APP-000149-NDM-000247
Group -
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....Rule High Severity -
SRG-APP-000395-NDM-000347
Group -
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 i...Rule Medium Severity -
SRG-APP-000164-NDM-000252
Group -
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 d...Rule Medium Severity -
SRG-APP-000166-NDM-000254
Group -
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 resisti...Rule Medium Severity -
SRG-APP-000167-NDM-000255
Group -
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 resistin...Rule Medium Severity -
SRG-APP-000168-NDM-000256
Group -
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 resistin...Rule Medium Severity -
SRG-APP-000169-NDM-000257
Group -
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 resistin...Rule Medium Severity -
SRG-APP-000170-NDM-000329
Group -
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 ...Rule Medium Severity -
SRG-APP-000400-NDM-000313
Group -
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 quest...Rule Medium Severity
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