The Ubuntu operating system must be configured so that Advance Package Tool (APT) removes all software components after updated versions have been installed.
An XCCDF Rule
Description
<VulnDiscussion>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.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-238370r958936_rule
- Severity
- Medium
- References
- Updated
Remediation - Manual Procedure
Configure APT to remove all software components after updated versions have been installed.
Add or updated the following options to the "/etc/apt/apt.conf.d/50unattended-upgrades" file:
Unattended-Upgrade::Remove-Unused-Dependencies "true";
Unattended-Upgrade::Remove-Unused-Kernel-Packages "true";