SV-253094r958936: YUM must remove all software components after updated versions have been installed on TOSS. | Tri-Lab Operating System Stack (TOSS) 4 STIG SCAP Benchmark

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Assessment Title

Rule Text

YUM must remove all software components after updated versions have been installed on TOSS.

Description

Discussion Text

Previous versions of software components that are not removed from the information system after updates have been installed may be exploited by adversaries. Some information technology products may remove older versions of software automatically from the information system.

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

IA Controls

NIST SP 800-53

Not mappedCCI-002617

References

DPMS Target TOSS 4 DISA DPMS Target TOSS 4 5469

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.toss4os:def:253094
# YUM must remove all software components after updated versions have been installed on TOSS.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# /etc/dnf/dnf.conf: clean_requirements_on_remove is set to True, 1 or yes
# textfilecontent54_object (textfilecontent54_test)
test_1() {
  grep -Pq '^[ \t]*clean_requirements_on_remove[ \t]*=[ \t]*(?:True|1|yes)[ \t]*$' '/etc/dnf/dnf.conf' &>/dev/null
}

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

Remediation

Configure the operating system to remove all software components after updated versions have been installed.

Set the "clean_requirements_on_remove" option to "True" in the "/etc/dnf/dnf.conf" file:

clean_requirements_on_remove=True