SV-260473r1155207: Ubuntu 22.04 LTS must disable kernel core dumps so that it can fail to a secure state if system initialization fails, shutdown fails or aborts fail. | Canonical Ubuntu 22.04 LTS STIG SCAP Benchmark

Loading benchmark…

Assessment Title

Rule Text

Ubuntu 22.04 LTS must disable kernel core dumps so that it can fail to a secure state if system initialization fails, shutdown fails or aborts fail.

Description

Discussion Text

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.

How this relates to the STIG checklist: STIG vs SCAP benchmark.

IA Controls

NIST SP 800-53

Not mappedCCI-001190

References

DPMS Target Canonical Ubuntu 22.04 LTS DISA DPMS Target Canonical Ubuntu 22.04 LTS 5594

SCC Automation Reference

The reconstructed evaluation script behind this rule's OVAL check(s) — every module a compound check combines, with this rule's own concrete values and DISA's SCC tool's real per-module mechanism curated from static teardown of SCC releases.

#!/bin/bash
# Reconstructed from oval:mil.disa.stig.ubuntu2204os:def:260473
# Ubuntu 22.04 LTS must disable kernel core dumps so that it can fail to a secure state if system initialization fails, shutdown fails or aborts fail.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# symlink_object (symlink_test)
test_1() {
  (readlink -f '/etc/systemd/system/kdump-tools.service') | grep -qxF '/dev/null'
}

if test_1; then
  echo "PASS"
else
  echo "FAIL"
fi

Assessment Script Powered by AISandbox-executed

A standalone Shell script to assess this control automatically. Review before running it in your environment.

Syntax-checked and actually executed in an isolated sandbox (not the real system this checks) — confirmed to run without errors.

#!/bin/sh
# OVAL definition: oval:mil.disa.stig.ubuntu2204os:def:260473

if [ ! -e /etc/systemd/system/kdump-tools.service ]; then
  echo "PASS"
  exit 0
fi

if [ ! -L /etc/systemd/system/kdump-tools.service ]; then
  echo "FAIL"
  exit 1
fi

DEST=$(readlink -f /etc/systemd/system/kdump-tools.service)
if [ "$DEST" != "/dev/null" ]; then
  echo "FAIL"
  exit 1
fi

echo "PASS"
exit 0

Remediation

If kernel core dumps are not required, disable and mask "kdump-tools.service" by using the following command:

$ sudo systemctl mask kdump-tools --now

If kernel core dumps are required, document the need with the ISSO.