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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 SV-37233r1_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
Red Hat Enterprise Linux 5 Security Technical Implementation Guide 2017-03-01

Details

Check Text ( C-35922r1_chk )
Verify system log files have no extended ACLs.

Procedure:
# ls -lL /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-31180r1_fix)
Remove the extended ACL from the file.

Procedure:
# setfacl --remove-all [file with extended ACL]