Audit logs on the AIX system must be group-owned by system.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-91265	AIX7-00-002014	SV-101365r1_rule		Medium

Description
Unauthorized disclosure of audit records can reveal system and configuration data to attackers, thus compromising its confidentiality. Audit information includes all information (e.g., audit records, audit settings, audit reports) needed to successfully audit operating system activity. Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029

STIG	Date
IBM AIX 7.x Security Technical Implementation Guide	2020-02-24

Details

Check Text ( C-90421r1_chk )
Check the log files under the audit logging directory have correct group ownership. The default log file is /audit/trail. The log file can be set by the "trail" variable in /etc/security/audit/config. # grep trail /etc/security/audit/config trail = /audit/trail # ls -l total 240 -rw-rw---- 1 root system 0 Feb 23 08:44 bin1 -rw-rw---- 1 root system 0 Feb 23 08:44 bin2 -rw-r----- 1 root system 116273 Feb 23 08:44 trail If any file's group ownership is not "system", this is a finding.

Check Text ( C-90421r1_chk )

Check the log files under the audit logging directory have correct group ownership.

The default log file is /audit/trail.

The log file can be set by the "trail" variable in /etc/security/audit/config.
# grep trail /etc/security/audit/config
trail = /audit/trail

# ls -l
total 240
-rw-rw---- 1 root system 0 Feb 23 08:44 bin1
-rw-rw---- 1 root system 0 Feb 23 08:44 bin2
-rw-r----- 1 root system 116273 Feb 23 08:44 trail

If any file's group ownership is not "system", this is a finding.

Fix Text (F-97465r1_fix)
Set the group of the audit log file to "system". # chgrp system