Title

The SUSE operating system must generate audit records for all uses of the chfn command. (Cat III 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. Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215

Check Content

Verify the SUSE operating system generates an audit record for all uses of the "chfn" command. Check that the command is being audited by performing 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 -k privileged-chfn If the command does not return any output or the returned line is commented out, this is a finding. Note: The "-k" allows for specifying an arbitrary identifier. The string following "-k" does not need to match the example output above.

Fix Text

Configure the SUSE operating system to generate an audit record for all uses of the "chfn" command. Add or update the following rules 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!=4294967295 -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-234933r854240_rule

Vulnerability ID: V-234933

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

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.