Title

Ubuntu 24.04 LTS must generate audit records for successful/unsuccessful uses of the newgrp 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 Ubuntu 24.04 LTS generates an audit record upon successful/unsuccessful attempts to use the "newgrp" command with the following command: $ sudo auditctl -l | grep newgrp -a always,exit -F path=/usr/bin/newgrp -F perm=x -F auid>=1000 -F auid!=-1 -k priv_cmd If the command does not return a line that matches the example or the line is commented out, this is a finding. Note: The "-k" allows for specifying an arbitrary identifier, and the string after it does not need to match the example output above.

Fix Text

Configure the audit system to generate an audit event for any successful/unsuccessful use of the "newgrp" command. Add or update the following rules in the "/etc/audit/rules.d/stig.rules" file: -a always,exit -F path=/usr/bin/newgrp -F perm=x -F auid>=1000 -F auid!=-1 -k priv_cmd To reload the rules file, issue the following command: $ sudo augenrules --load

Additional Identifiers

Rule ID: SV-270791r1066862_rule

Vulnerability ID: V-270791

Group Title: SRG-OS-000064-GPOS-00033

Expert Comments

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