The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the chacl command.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-238284	UBTU-20-010168	SV-238284r654027_rule		Medium

Description
Without generating audit records that are 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).

STIG	Date
Canonical Ubuntu 20.04 LTS Security Technical Implementation Guide	2022-12-06

Details

Check Text ( C-41494r654025_chk )
Verify the Ubuntu operating system generates an audit record upon successful/unsuccessful attempts to use the "chacl" command. Check the currently configured audit rules with the following command: $ sudo audtctl -l \| grep chacl -a always,exit -F path=/usr/bin/chacl -F perm=x -F auid>=1000 -F auid!=-1 -k perm_chng 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.

Check Text ( C-41494r654025_chk )

Verify the Ubuntu operating system generates an audit record upon successful/unsuccessful attempts to use the "chacl" command.

Check the currently configured audit rules with the following command:

$ sudo audtctl -l | grep chacl

-a always,exit -F path=/usr/bin/chacl -F perm=x -F auid>=1000 -F auid!=-1 -k perm_chng

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 (F-41453r654026_fix)
Configure the audit system to generate an audit event for any successful/unsuccessful use of the "chacl" command. Add or update the following rules in the "/etc/audit/rules.d/stig.rules" file: -a always,exit -F path=/usr/bin/chacl -F perm=x -F auid>=1000 -F auid!=4294967295 -k perm_chng To reload the rules file, issue the following command: $ sudo augenrules --load