Kernel core dumps must be disabled unless needed.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-219335	UBTU-18-010505	SV-219335r610963_rule		Medium

Description
Kernel core dumps may contain the full contents of system memory at the time of the crash. Kernel core dumps may consume a considerable amount of disk space and may result in denial of service by exhausting the available space on the target file system partition.

STIG	Date
Canonical Ubuntu 18.04 LTS Security Technical Implementation Guide	2023-03-06

Details

Check Text ( C-21060r305333_chk )
Verify that kernel core dumps are disabled unless needed. Check if "kdump" service is active with the following command: # systemctl is-active kdump.service inactive If the "kdump" service is active, ask the System Administrator if the use of the service is required and documented with the Information System Security Officer (ISSO). If the service is active and is not documented, this is a finding.

Check Text ( C-21060r305333_chk )

Verify that kernel core dumps are disabled unless needed.

Check if "kdump" service is active with the following command:

# systemctl is-active kdump.service
inactive

If the "kdump" service is active, ask the System Administrator if the use of the service is required and documented with the Information System Security Officer (ISSO).

If the service is active and is not documented, this is a finding.

Fix Text (F-21059r305334_fix)
If kernel core dumps are not required, disable the "kdump" service with the following command: # systemctl disable kdump.service If kernel core dumps are required, document the need with the Information System Security Officer (ISSO).