SV-270746r1155242: Ubuntu 24.04 LTS must disable kernel core dumps. | Canonical Ubuntu 24.04 LTS STIG SCAP Benchmark

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Assessment Title

Rule Text

Ubuntu 24.04 LTS must disable kernel core dumps.

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 24.04 LTS DISA DPMS Target Canonical Ubuntu 24.04 LTS 5673

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.ubuntu2404os:def:270746
# Ubuntu 24.04 LTS must disable kernel core dumps.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# systemdunitproperty_object (systemdunitproperty_test)
test_1() {
  (systemctl show -p 'LoadState' --value 'kdump-tools.service') | grep -qxF 'masked'
}
# systemdunitproperty_object (systemdunitproperty_test)
test_2() {
  (systemctl show -p 'UnitFileState' --value 'kdump-tools.service') | grep -qxF 'masked'
}
# systemdunitproperty_object (systemdunitproperty_test)
test_3() {
  (systemctl show -p 'ActiveState' --value 'kdump-tools.service') | grep -qxF 'inactive'
}

if ( test_1 && test_2 && test_3 ); then
  echo "PASS"
else
  echo "FAIL"
fi

Remediation

If kernel core dumps are not required, disable the "kdump-tools" service with the following command: 
 
$ sudo systemctl disable kdump-tools.service
 
If kernel core dumps are required, document the need with the ISSO.