Title

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

Discussion

Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter).

Check Content

Verify SLEM 5 generates an audit record for all uses of the "chacl" command with the following command: > sudo auditctl -l | grep -w '/usr/bin/chacl' -a always,exit -S all -F path=/usr/bin/chacl -F perm=x -F auid>=1000 -F auid!=-1 -F key=prim_mod If the command does not return a line that matches the example or the 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 "chacl" command. Add or update the following rules in the "/etc/audit/rules.d/audit.rules" file: -a always,exit -F path=/usr/bin/chacl -F perm=x -F auid>=1000 -F auid!=unset -k prim_mod To reload the rules file, restart the audit daemon: > sudo systemctl restart auditd.service or issue the following command: > sudo augenrules --load Note: The "-k <keyname>" at the end of the line gives the rule a unique meaning to help during an audit investigation. The <keyname> does not need to match the example above.

Additional Identifiers

Rule ID: SV-261425r996682_rule

Vulnerability ID: V-261425

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

Expert Comments

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