V-261443

Discussion

Reconstruction of harmful events or forensic analysis is not possible if audit records do not contain enough information. At a minimum, the organization must audit the full-text recording of privileged commands. The organization must maintain audit trails in sufficient detail to reconstruct events to determine the cause and impact of compromise.

Check Content

Verify SLEM 5 generates an audit record for all uses of the "ssh-keysign" command with the following command:

     > sudo auditctl -l | grep -w '/usr/lib/ssh/ssh-keysign'
     -a always,exit -S all -F path=/usr/lib/ssh/ssh-keysign -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-ssh-keysign

If the command does not return any output, this is a finding.

Note: The "key=" value is arbitrary and can be different from the example output above.