Title

YUM must remove all software components after updated versions have been installed on RHEL 8. (Cat III impact)

Discussion

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.

Check Content

Verify the operating system removes all software components after updated versions have been installed. Check if YUM is configured to remove unneeded packages with the following command: $ sudo grep -i clean_requirements_on_remove /etc/dnf/dnf.conf clean_requirements_on_remove=True If "clean_requirements_on_remove" is not set to either "1", "True", or "yes", commented out, or is missing from "/etc/dnf/dnf.conf", this is a finding.

Fix Text

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

Additional Identifiers

Rule ID: SV-230281r958936_rule

Vulnerability ID: V-230281

Group Title: SRG-OS-000437-GPOS-00194

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.