The Ubuntu operating system must permit only authorized groups to own the audit log files.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-219230	UBTU-18-010307	SV-219230r508662_rule		Medium

Description
If audit information were to become compromised, then forensic analysis and discovery of the true source of potentially malicious system activity is impossible to achieve. To ensure the veracity of audit information, the operating system must protect audit information from unauthorized modification. Audit information includes all information (e.g., audit records, audit settings, audit reports) needed to successfully audit information system activity. Satisfies: SRG-OS-000058-GPOS-00028, SRG-OS-000057-GPOS-00027

Description

If audit information were to become compromised, then forensic analysis and discovery of the true source of potentially malicious system activity is impossible to achieve. To ensure the veracity of audit information, the operating system must protect audit information from unauthorized modification. Audit information includes all information (e.g., audit records, audit settings, audit reports) needed to successfully audit information system activity. Satisfies: SRG-OS-000058-GPOS-00028, SRG-OS-000057-GPOS-00027

STIG	Date
Canonical Ubuntu 18.04 LTS Security Technical Implementation Guide	2020-09-10

Details

Check Text ( C-20955r305018_chk )
Verify that the audit log files are owned by "root" group. First 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, check if the audit log files are owned by the "root" group by using the following command: # sudo stat -c "%n %G" /var/log/audit/* /var/log/audit/audit.log root If the audit log files are owned by a group other than "root", this is a finding.

Check Text ( C-20955r305018_chk )

Verify that the audit log files are owned by "root" group.

First 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, check if the audit log files are owned by the "root" group by using the following command:

# sudo stat -c "%n %G" /var/log/audit/*
/var/log/audit/audit.log root

If the audit log files are owned by a group other than "root", this is a finding.

Fix Text (F-20954r305019_fix)
Configure the audit log files to be owned by "root" group. First 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 be owned by "root" group by using the following command: # sudo chown :root /var/log/audit/*

Fix Text (F-20954r305019_fix)

Configure the audit log files to be owned by "root" group.

First 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 be owned by "root" group by using the following command:

# sudo chown :root /var/log/audit/*