Title

The SUSE operating system must generate audit records for all uses of the newgrp 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 "newgrp" command. Check that the following command call is being audited by performing the following command on the system rules in "/etc/audit/audit.rules": # sudo grep -i newgrp /etc/audit/audit.rules -a always,exit -F path=/usr/bin/newgrp -F perm=x -F auid>=1000 -F auid!=4294967295 -k privileged-newgrp If the command does not return any output or the returned line is commented out, this is a finding.

Fix Text

Configure the SUSE operating system to generate an audit record for all uses the "newgrp" command. Add or update the following rules in the "/etc/audit/rules.d/audit.rules" file: -a always,exit -F path=/usr/bin/newgrp -F perm=x -F auid>=1000 -F auid!=4294967295 -k privileged-newgrp The audit daemon must be restarted for the changes to take effect. # sudo systemctl restart auditd.service

Additional Identifiers

Rule ID: SV-217238r958412_rule

Vulnerability ID: V-217238

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.