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

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-238291	UBTU-20-010175	SV-238291r951537_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	2024-02-18

Details

Check Text ( C-41501r951535_chk )
Verify that an audit event is generated for any successful/unsuccessful use of the "chage" command Check the currently configured audit rules with the following command: $ sudo auditctl -l \| grep -w chage -a always,exit -S all -F path=/usr/bin/chage -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-chage 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.

Check Text ( C-41501r951535_chk )

Verify that an audit event is generated for any successful/unsuccessful use of the "chage" command

Check the currently configured audit rules with the following command:

$ sudo auditctl -l | grep -w chage

-a always,exit -S all -F path=/usr/bin/chage -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-chage

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 (F-41460r951536_fix)
Configure the audit system to generate an audit event for any successful/unsuccessful uses of the "chage" command. Add or update the following rules in the "/etc/audit/rules.d/stig.rules" file: -a always,exit -F path=/usr/bin/chage -F perm=x -F auid>=1000 -F auid!=unset -k privileged-chage To reload the rules file, issue the following command: $ sudo augenrules --load Note: The "-k " at the end of the line gives the rule a unique meaning to help during an audit investigation. The does not need to match the example above.

Fix Text (F-41460r951536_fix)

Configure the audit system to generate an audit event for any successful/unsuccessful uses of the "chage" command.

Add or update the following rules in the "/etc/audit/rules.d/stig.rules" file:

-a always,exit -F path=/usr/bin/chage -F perm=x -F auid>=1000 -F auid!=unset -k privileged-chage

To reload the rules file, issue the following command:

$ sudo augenrules --load

Note: The "-k " at the end of the line gives the rule a unique meaning to help during an audit investigation. The does not need to match the example above.