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.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-266066 | F5BI-DM-300009 | SV-266066r1051115_rule | Medium |
| Description |
| 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 the account of last resort since it is intended to be used as a last resort and when immediate administrative access is absolutely necessary. The account of last resort logon credentials must be stored in a sealed envelope and kept in a safe. The safe must be periodically audited to verify the envelope remains sealed. The signature of the auditor and the date of the audit must be added to the envelope as a record. Administrators must secure the credentials and disable the root account (if possible) when not needed for system administration functions. |
| STIG | Date |
| F5 BIG-IP TMOS NDM Security Technical Implementation Guide | 2025-06-12 |
Details
| Check Text (C-69989r1023447_chk) |
| From the BIG-IP GUI: 1. System. 2. Users. 3. User List. 4. Verify there is only one account of last resort listed. From the BIG-IP console, type the following command: tmsh list auth user If there is more than one account of last resort listed, this is a finding. |
| Fix Text (F-69892r1023448_fix) |
| From the BIG-IP GUI: 1. System. 2. Users. 3. User List. 4. Delete any local users that are not the account of last resort. From the BIG-IP console, type the following commands: tmsh delete auth user <username> tmsh save sys config |