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

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-100703	UBTU-18-010315	SV-109807r1_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 18.04 LTS Security Technical Implementation Guide	2020-05-29

Details

Check Text ( C-99565r1_chk )
Verify if the Ubuntu operating system generates audit records when successful/unsuccessful attempts to use the "su" command occur. Check the configured audit rules with the following commands: # sudo auditctl -l \| grep '/bin/su' -a always,exit -F path=/bin/su -F perm=x -F auid>=1000 -F auid!=4294967295 -k privileged-priv_change If the command does not return lines that match the example or the lines are 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-99565r1_chk )

Verify if the Ubuntu operating system generates audit records when successful/unsuccessful attempts to use the "su" command occur.

Check the configured audit rules with the following commands:

# sudo auditctl -l | grep '/bin/su'

-a always,exit -F path=/bin/su -F perm=x -F auid>=1000 -F auid!=4294967295 -k privileged-priv_change

If the command does not return lines that match the example or the lines are 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-106389r1_fix)
Configure the Ubuntu operating system to generate audit records when successful/unsuccessful attempts to use the "su" command occur. Add or update the following rules in the "/etc/audit/rules.d/stig.rules" file: -a always,exit -F path=/bin/su -F perm=x -F auid>=1000 -F auid!=4294967295 -k privileged-priv_change In order to reload the rules file, issue the following command: # sudo augenrules --load Note: The "root" account must be used to view/edit any files in the /etc/audit/rules.d/ directory.

Fix Text (F-106389r1_fix)

Configure the Ubuntu operating system to generate audit records when successful/unsuccessful attempts to use the "su" command occur.

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

-a always,exit -F path=/bin/su -F perm=x -F auid>=1000 -F auid!=4294967295 -k privileged-priv_change

In order to reload the rules file, issue the following command:

# sudo augenrules --load

Note:
The "root" account must be used to view/edit any files in the /etc/audit/rules.d/ directory.