SV-248630r1156670: OL 8 must disable acquiring, saving, and processing core dumps. | Oracle Linux 8 STIG SCAP Benchmark

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Assessment Title

Rule Text

OL 8 must disable acquiring, saving, and processing core dumps.

Description

Discussion Text

It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the risk to the platform by providing additional attack vectors. A core dump includes a memory image taken at the time the operating system terminates an application. The memory image could contain sensitive data and is generally useful only for developers trying to debug problems. When the kernel invokes "systemd-coredump" to handle a core dump, it runs in privileged mode and will connect to the socket created by the "systemd-coredump.socket" unit. This, in turn, will spawn an nonprivileged "systemd-coredump@.service" instance to process the core dump.

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

IA Controls

NIST SP 800-53

Not mappedCCI-000366

References

DPMS Target Oracle Linux 8 DISA DPMS Target Oracle Linux 8 5416

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.ol8os:def:248630
# OL 8 must disable acquiring, saving, and processing core dumps.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# systemd-coredump.socket LoadState is masked if exists
# systemdunitproperty_object (systemdunitproperty_test)
test_1() {
  (systemctl show -p 'LoadState' --value 'systemd-coredump.socket') | grep -qxF 'masked'
}
# systemd-coredump.socket UnitFileState is masked if exists
# systemdunitproperty_object (systemdunitproperty_test)
test_2() {
  (systemctl show -p 'UnitFileState' --value 'systemd-coredump.socket') | grep -qxF 'masked'
}

if ( test_1 && test_2 ); 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.ol8os:def:248630
if [ ! -x "$(command -v systemctl)" ]; then echo "FAIL"; exit 1; fi
if [ -e /etc/systemd/system/systemd-coredump.socket ]; then if [ "$(readlink -f /etc/systemd/system/systemd-coredump.socket)" = "/dev/null" ]; then systemctl status systemd-coredump.socket | grep "Loaded: masked" &> /dev/null && echo "PASS"; exit 0; else echo "FAIL"; exit 1; fi; else echo "PASS"; exit 0; fi

Remediation

Configure the system to disable the "systemd-coredump.socket" with the following commands:

$ sudo systemctl disable --now systemd-coredump.socket

$ sudo systemctl mask systemd-coredump.socket

Created symlink /etc/systemd/system/systemd-coredump.socket -> /dev/null