The Ubuntu operating system must be configured so that audit log files are not read or write-accessible by unauthorized users.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-238245	UBTU-20-010122	SV-238245r653910_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

STIG	Date
Canonical Ubuntu 20.04 LTS Security Technical Implementation Guide	2021-03-23

Details

Check Text ( C-41455r653908_chk )
Verify that the audit log files have a mode of "0600" or less permissive. Determine where the audit logs are stored with the following command: $ sudo grep -iw log_file /etc/audit/auditd.conf log_file = /var/log/audit/audit.log Using the path of the directory containing the audit logs, determine if the audit log files have a mode of "0600" or less by using the following command: $ sudo stat -c "%n %a" /var/log/audit/* /var/log/audit/audit.log 600 If the audit log files have a mode more permissive than "0600", this is a finding.

Check Text ( C-41455r653908_chk )

Verify that the audit log files have a mode of "0600" or less permissive.

Determine where the audit logs are stored with the following command:

$ sudo grep -iw log_file /etc/audit/auditd.conf
log_file = /var/log/audit/audit.log

Using the path of the directory containing the audit logs, determine if the audit log files have a mode of "0600" or less by using the following command:

$ sudo stat -c "%n %a" /var/log/audit/*
/var/log/audit/audit.log 600

If the audit log files have a mode more permissive than "0600", this is a finding.

Fix Text (F-41414r653909_fix)
Configure the audit log files to have a mode of "0600" or less permissive. Determine where the audit logs are stored with the following command: $ sudo grep -iw log_file /etc/audit/auditd.conf log_file = /var/log/audit/audit.log Using the path of the directory containing the audit logs, configure the audit log files to have a mode of "0600" or less permissive by using the following command: $ sudo chmod 0600 /var/log/audit/*

Fix Text (F-41414r653909_fix)

Configure the audit log files to have a mode of "0600" or less permissive.

Determine where the audit logs are stored with the following command:

$ sudo grep -iw log_file /etc/audit/auditd.conf
log_file = /var/log/audit/audit.log

Using the path of the directory containing the audit logs, configure the audit log files to have a mode of "0600" or less permissive by using the following command:

$ sudo chmod 0600 /var/log/audit/*