V-270650

Discussion

Without verification, security functions may not operate correctly and the failure may go unnoticed. Security function is defined as the hardware, software, and/or firmware of the information system responsible for enforcing the system security policy and supporting the isolation of code and data on which the protection is based. Security functionality includes, but is not limited to, establishing system accounts, configuring access authorizations (i.e., permissions, privileges), setting events to be audited, and setting intrusion detection parameters. This requirement applies to Ubuntu 24.04 LTS performing security function verification/testing and/or systems and environments that require this functionality.

Check Content

Note: If a file integrity tool other than Advanced Intrusion Detection Environment (AIDE) is employed, this requirement is not applicable.

Verify AIDE is configured on the system by performing a manual check:

$ sudo aide -c /etc/aide/aide.conf --check

Example output:
...
Start timestamp: 2024-10-30 14:22:38 -0400 (AIDE 0.18.6)
AIDE found differences between database and filesystem!!
...

If AIDE is being used for system file integrity checking and the command fails, this is a finding.