Kernel core dumps must be disabled unless needed.

From Canonical Ubuntu 16.04 Security Technical Implementation Guide

Associated with: CCI-000366

SV-90265r1_rule Kernel core dumps must be disabled unless needed.

Vulnerability discussion

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.

Check content

Verify that kernel core dumps are disabled unless needed. Check the status of the "kdump" service with the following command: # systemctl status kdump.service Loaded: not-found (Reason: No such file or directory) Active: inactive (dead) 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

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).

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