System log files must not have extended ACLs, except as needed to support authorized software.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-22315	GEN001270 M6	SV-38073r1_rule	ECLP-1 ECTP-1	Medium

Description
If the system log files are not protected, unauthorized users could change the logged data, eliminating its forensic value. Authorized software may be given log file access through the use of extended ACLs when needed and configured to provide the least privileges required.

STIG	Date
MAC OSX 10.6 Workstation Security Technical Implementation Guide Draft	2013-01-10

Details

Check Text ( C-37612r1_chk )
Open a terminal session and enter the following command to view the system log files ACLs. ls -lLR /var/log If the permissions include a '+', the file has an extended ACL. If an extended ACL exists, verify with the SA if the ACL is required to support authorized software and provides the minimum necessary permissions. If an extended ACL exists, providing access beyond the needs of authorized software, this is a finding.

Check Text ( C-37612r1_chk )

Open a terminal session and enter the following command to view the system log files ACLs.

ls -lLR /var/log

If the permissions include a '+', the file has an extended ACL. If an extended ACL exists, verify with the SA if the ACL is required to support authorized software and provides the minimum necessary permissions. If an extended ACL exists, providing access beyond the needs of authorized software, this is a finding.

Fix Text (F-32854r1_fix)
Open a terminal session and enter the following command to remove the extended ACLs. chmod -N /var/log