Information
Once an attacker establishes initial access to a system, the attacker often attempts to create a persistent method of reestablishing access. One way to accomplish this is for the attacker to simply modify an existing account. Notification of account modification is one method for mitigating this risk. A comprehensive account management process will ensure an audit trail that documents the modification of device administrator accounts and notifies administrators and the ISSO. Such a process greatly reduces the risk that accounts will be surreptitiously modified and provides logging that can be used for forensic purposes.
The network device must generate the alert. Notification may be done by a management server.
NOTE: Nessus has not performed this check. Please review the benchmark to ensure target compliance.
Solution
Configure the BIG-IP appliance to use a properly configured authentication server to send a notification message to the administrators and ISSO when accounts are modified.