STIGQter: STIG Summary: Cloud Linux AlmaLinux OS 9 Security Technical Implementation Guide Version: 1 Release: 7 Benchmark Date: 01 Jul 2026:

AlmaLinux OS 9 must audit all uses of the truncate, ftruncate, creat, open, openat, and open_by_handle_at system calls.

DISA Rule

SV-269475r1134834_rule

Vulnerability Number

V-269475

Group Title

SRG-OS-000037-GPOS-00015

Rule Version

ALMA-09-048090

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-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 AlmaLinux OS 9 to generate audit records upon successful/unsuccessful attempts to use the "truncate", "ftruncate", "creat", "open", "openat", and "open_by_handle_at" syscalls.

Add the following to the "/etc/audit/rules.d/audit.rules" file:

-a always,exit -F arch=b64 -S creat,open,openat,truncate,ftruncate,open_by_handle_at -F exit=-EACCES -F auid>=1000 -F auid!=unset -k access
-a always,exit -F arch=b64 -S creat,open,openat,truncate,ftruncate,open_by_handle_at -F exit=-EPERM -F auid>=1000 -F auid!=unset -k access
-a always,exit -F arch=b32 -S creat,open,openat,truncate,ftruncate,open_by_handle_at -F exit=-EACCES -F auid>=1000 -F auid!=unset -k access
-a always,exit -F arch=b32 -S creat,open,openat,truncate,ftruncate,open_by_handle_at -F exit=-EPERM -F auid>=1000 -F auid!=unset -k access

Merge the rules into /etc/audit/audit.rules:

$ augenrules --load

Check Contents

Verify that AlmaLinux OS 9 is configured to audit the execution of the "truncate", "ftruncate", "creat", "open", "openat", and "open_by_handle_at" system calls with the following command:

$ grep -E 'open|truncate|creat' /etc/audit/audit.rules

-a always,exit -F arch=b32 -S open,creat,truncate,ftruncate,openat,open_by_handle_at -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=perm_access
-a always,exit -F arch=b64 -S open,truncate,ftruncate,creat,openat,open_by_handle_at -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=perm_access
-a always,exit -F arch=b32 -S open,creat,truncate,ftruncate,openat,open_by_handle_at -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=perm_access
-a always,exit -F arch=b64 -S open,truncate,ftruncate,creat,openat,open_by_handle_at -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=perm_access

If both the "b32" and "b64" audit rules are not defined for the "truncate", "ftruncate", "creat", "open", "openat", and "open_by_handle_at" system calls, or any of the lines returned are commented out, this is a finding.

Vulnerability Number

V-269475

Documentable

False

Rule Version

ALMA-09-048090

Severity Override Guidance

Verify that AlmaLinux OS 9 is configured to audit the execution of the "truncate", "ftruncate", "creat", "open", "openat", and "open_by_handle_at" system calls with the following command:

$ grep -E 'open|truncate|creat' /etc/audit/audit.rules

-a always,exit -F arch=b32 -S open,creat,truncate,ftruncate,openat,open_by_handle_at -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=perm_access
-a always,exit -F arch=b64 -S open,truncate,ftruncate,creat,openat,open_by_handle_at -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=perm_access
-a always,exit -F arch=b32 -S open,creat,truncate,ftruncate,openat,open_by_handle_at -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=perm_access
-a always,exit -F arch=b64 -S open,truncate,ftruncate,creat,openat,open_by_handle_at -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=perm_access

If both the "b32" and "b64" audit rules are not defined for the "truncate", "ftruncate", "creat", "open", "openat", and "open_by_handle_at" system calls, or any of the lines returned are commented out, this is a finding.

Check Content Reference

M

Target Key

5664