STIGQter: STIG Summary: Red Hat Enterprise Linux 9 Security Technical Implementation Guide Version: 2 Release: 9 Benchmark Date: 01 Jul 2026:

RHEL 9 must audit all uses of the postdrop command.

DISA Rule

SV-258199r1045382_rule

Vulnerability Number

V-258199

Group Title

SRG-OS-000037-GPOS-00015

Rule Version

RHEL-09-654125

Severity

CAT II

CCI(s)

CCI-000130 - Ensure that audit records containing information that establishes what type of event occurred.
CCI-000135 - Generate audit records containing the organization-defined additional information that is to be included in the audit records.
CCI-000169 - Provide audit record generation capability for the event types the system is capable of auditing as defined in AU-2 a. on organization-defined information system components.
CCI-000172 - Generate audit records for the event types defined in AU-2 c that include the audit record content defined in AU-3.
CCI-002884 - Log organization-defined audit events for nonlocal maintenance and diagnostic sessions.

Weight

Fix Recommendation

Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "postdrop" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules":

-a always,exit -F path=/usr/sbin/postdrop -F perm=x -F auid>=1000 -F auid!=unset -k privileged-unix-update

To load the rules to the kernel immediately, use the following command:

$ sudo augenrules --load

Check Contents

Verify that RHEL 9 is configured to audit the execution of the "postdrop" command with the following command:

$ sudo auditctl -l | grep postdrop

-a always,exit -S all -F path=/usr/sbin/postdrop -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-unix-update

If the command does not return a line, or the line is commented out, this is a finding.

Vulnerability Number

V-258199

Documentable

False

Rule Version

RHEL-09-654125

Severity Override Guidance

Check Content Reference

Target Key

5551