Title

SLEM 5 must generate audit records for all uses of the "chfn" command. (Cat II impact)

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 "chfn" command with the following command: > sudo auditctl -l | grep -w '/usr/bin/chfn' -a always,exit -S all -F path=/usr/bin/chfn -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-chfn If the command does not return any output or the returned line is commented out, this is a finding. Note: The "key=" value is arbitrary and can be different from the example output above.

Fix Text

Configure SLEM 5 to generate an audit record for all uses of the "chfn" command. Add or modify the following line in the "/etc/audit/rules.d/audit.rules" file: -a always,exit -F path=/usr/bin/chfn -F perm=x -F auid>=1000 -F auid!=unset -k privileged-chfn To reload the rules file, restart the audit daemon: > sudo systemctl restart auditd.service or issue the following command: > sudo augenrules --load

Additional Identifiers

Rule ID: SV-261428r996691_rule

Vulnerability ID: V-261428

Group Title: SRG-OS-000037-GPOS-00015

Expert Comments

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