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The audit system must be configured to audit all attempts to alter system time through stime.


Overview

Finding ID Version Rule ID IA Controls Severity
V-208884 OL6-00-000169 SV-208884r603263_rule Low
Description
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.
STIG Date
Oracle Linux 6 Security Technical Implementation Guide 2020-12-04

Details

Check Text ( C-9137r357632_chk )
If the system is 64-bit only, this is not applicable.

To determine if the system is configured to audit calls to the "stime" system call, run the following command:

$ sudo grep -w "stime" /etc/audit/audit.rules
-a always,exit -F arch=b32 -S stime -k audit_time_rules

If the system is not configured to audit the "stime" system call, this is a finding.
Fix Text (F-9137r357633_fix)
On a 32-bit system, add the following to "/etc/audit/audit.rules":

# audit_time_rules
-a always,exit -F arch=b32 -S stime -k audit_time_rules

Note: On a 64-bit system, it is not necessary to define a rule for "stime".