Title

Ubuntu OS must not have the "ntp" package installed. (Cat II impact)

Discussion

Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the correct time a particular event occurred on a system is critical when conducting forensic analysis and investigating system events. Sources outside the configured acceptable allowance (drift) may be inaccurate. Organizations must consider endpoints that may not have regular access to the authoritative time server (e.g., mobile, teleworking, and tactical endpoints).

Check Content

Verify the "ntp" package is not installed by using the following command: $ dpkg -l | grep ntp If the "ntp" package is installed, this is a finding.

Fix Text

Uninstall the "ntp" package by using the following command: $ sudo dpkg -P --force-all ntp

Additional Identifiers

Rule ID: SV-275575r1147775_rule

Vulnerability ID: V-275575

Group Title: SRG-OS-000480-GPOS-00227

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.