UCF STIG Viewer Logo

The audit system must be configured to audit all attempts to alter system time through /etc/localtime.


Finding ID Version Rule ID IA Controls Severity
V-217955 RHEL-06-000173 SV-217955r505923_rule Low
Arbitrary changes to the system time can be used to obfuscate nefarious activities in log files, as well as to confuse network services that are highly dependent upon an accurate system time (such as sshd). All changes to the system time should be audited.
Red Hat Enterprise Linux 6 Security Technical Implementation Guide 2020-09-03


Check Text ( C-19436r376880_chk )
To determine if the system is configured to audit attempts to alter time via the /etc/localtime file, run the following command:

$ sudo grep -w "/etc/localtime" /etc/audit/audit.rules

If the system is configured to audit this activity, it will return a line.

If the system is not configured to audit time changes, this is a finding.
Fix Text (F-19434r376881_fix)
Add the following to "/etc/audit/audit.rules":

-w /etc/localtime -p wa -k audit_time_rules

The -k option allows for the specification of a key in string form that can be used for better reporting capability through ausearch and aureport and should always be used.