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Kernel core dumps must be disabled unless needed.


Overview

Finding ID Version Rule ID IA Controls Severity
V-219335 UBTU-18-010505 SV-219335r508662_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 2020-09-10

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.
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).