STIGQter: STIG Summary: Oracle Linux 9 Security Technical Implementation Guide Version: 1 Release: 6 Benchmark Date: 01 Jul 2026:

OL 9 must be configured so that successful/unsuccessful uses of the umount2 system call generate an audit record.

DISA Rule

SV-271595r1155316_rule

Vulnerability Number

V-271595

Group Title

SRG-OS-000037-GPOS-00015

Rule Version

OL09-00-000845

Severity

CAT II

CCI(s)

• CCI-000130 - Ensure that audit records containing information that establishes what type of event occurred.
• 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-002884 - Log organization-defined audit events for nonlocal maintenance and diagnostic sessions.
• 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 the audit system to generate an audit event for any successful/unsuccessful use of the umount2 system call by adding the following rules to a rules file in /etc/audit/rules.d/ directory: (Example /etc/audit/rules.d/audit.rules)

-a always,exit -F arch=b32 -S umount2 -F auid>=1000 -F auid!=unset -k perm_mod
-a always,exit -F arch=b64 -S umount2 -F auid>=1000 -F auid!=unset -k perm_mod

The audit daemon must be restarted for the changes to take effect.

Restart auditd:
$ sudo service auditd restart

Check Contents

Verify OL 9 generates an audit record for all uses of the umount2 system call with the following commands:

$ sudo auditctl -l | grep umount2

-a always,exit -F arch=b32 -S umount2 -F auid>=1000 -F auid!=-1 -F key=privileged-umount
-a always,exit -F arch=b64 -S umount2 -F auid>=1000 -F auid!=-1 -F key=privileged-umount

If the command does not return an audit rule for "umount2" or any of the lines returned are commented out, this is a finding.

Vulnerability Number

V-271595

Documentable

False

Rule Version

OL09-00-000845

Severity Override Guidance

Verify OL 9 generates an audit record for all uses of the umount2 system call with the following commands:

$ sudo auditctl -l | grep umount2

-a always,exit -F arch=b32 -S umount2 -F auid>=1000 -F auid!=-1 -F key=privileged-umount
-a always,exit -F arch=b64 -S umount2 -F auid>=1000 -F auid!=-1 -F key=privileged-umount

If the command does not return an audit rule for "umount2" or any of the lines returned are commented out, this is a finding.

Check Content Reference

M

Target Key

5680