STIGQter: STIG Summary: Riverbed NetIM OS Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 11 Sep 2025:

Ubuntu OS must generate audit records when successful/unsuccessful attempts to modify the /etc/sudoers file occur.

DISA Rule

SV-275731r1148243_rule

Vulnerability Number

V-275731

Group Title

SRG-OS-000466-GPOS-00210

Rule Version

RIIM-OS-654220

Severity

CAT II

CCI(s)

• CCI-000172 - Generate audit records for the event types defined in AU-2 c that include the audit record content defined in AU-3.

Weight

10

Fix Recommendation

Configure Ubuntu OS to generate audit records for all modifications that affect "/etc/sudoers".

Add or modify the following line to "/etc/audit/rules.d/stig.rules":

-w /etc/sudoers -p wa -k privilege_modification

To reload the rules file, 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.

Check Contents

Verify Ubuntu OS generates audit records for all modifications that affect "/etc/sudoers" by using the following command:

$ sudo auditctl -l | grep sudoers
-w /etc/sudoers -p wa -k privilege_modification

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" value is arbitrary and can be different from the example output above.

Vulnerability Number

V-275731

Documentable

False

Rule Version

RIIM-OS-654220

Severity Override Guidance

Verify Ubuntu OS generates audit records for all modifications that affect "/etc/sudoers" by using the following command:

$ sudo auditctl -l | grep sudoers
-w /etc/sudoers -p wa -k privilege_modification

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" value is arbitrary and can be different from the example output above.

Check Content Reference

M

Target Key

5706