Audit log directories must have a mode of 0750 or less permissive to prevent unauthorized read access.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-75637	UBTU-16-020100	SV-90317r2_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 Ubuntu operating system activity. Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029

STIG	Date
Canonical Ubuntu 16.04 LTS Security Technical Implementation Guide	2018-07-18

Details

Check Text ( C-75341r2_chk )
Verify the audit log directories have a mode of "0750" or less permissive by first determining 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 location of the audit log, determine the directory where the audit logs are stored (ex: "/var/log/audit"). Run the following command to determine the permissions for the audit log folder: # sudo stat -c "%a %n" /var/log/audit 750 /var/log/audit If the audit log directory has a mode more permissive than "0750", this is a finding.

Check Text ( C-75341r2_chk )

Verify the audit log directories have a mode of "0750" or less permissive by first determining 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 location of the audit log, determine the directory where the audit logs are stored (ex: "/var/log/audit"). Run the following command to determine the permissions for the audit log folder:

# sudo stat -c "%a %n" /var/log/audit
750 /var/log/audit

If the audit log directory has a mode more permissive than "0750", this is a finding.

Fix Text (F-82265r1_fix)
Configure the audit log directory to be protected from unauthorized read access by setting the correct permissive mode with the following command: # sudo chmod 0750 [audit_log_directory] Replace "[audit_log_directory]" to the correct audit log directory path, by default this location is "/var/log/audit".