The time synchronization configuration file (such as /etc/ntp.conf) must not have an extended ACL.

From AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE

Associated with IA controls: ECLP-1

Associated with: CCI-000225

SV-38667r1_rule The time synchronization configuration file (such as /etc/ntp.conf) must not have an extended ACL.

Vulnerability discussion

A synchronized system clock is critical for the enforcement of time-based policies and the correlation of logs and audit records with other systems. If an illicit time source is used for synchronization, the integrity of system logs and the security of the system could be compromised. If the configuration files controlling time synchronization are not protected, unauthorized modifications could result in the failure of time synchronization.

Check content

Check for an extended ACL on the NTP configuration file. # aclget /etc/ntp.conf If extended permissions are not disabled, this is a finding.

Fix text

Remove the extended ACL from the ntp.conf file. #acledit /etc/ntp.conf

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