CVE-2020-16122 : Vulnerability Insights and Analysis

PackageKit's apt backend mistakenly treated all local debs as trusted, potentially allowing users to install malicious packages.

Understanding CVE-2020-16122

PackageKit's vulnerability could lead to the installation of untrusted local packages, impacting system security.

What is CVE-2020-16122?

PackageKit's apt backend incorrectly considered all local debs as trusted, bypassing the repository-based security model.

The Impact of CVE-2020-16122

CVSS Score: 8.2 (High)
Attack Vector: Local
Confidentiality Impact: High
Integrity Impact: High
Availability Impact: High
Privileges Required: Low
User Interaction: Required
Scope: Changed
This vulnerability could allow users to install malicious packages on systems with configured PolicyKit rules.

Technical Details of CVE-2020-16122

PackageKit's flaw in handling local debs poses a significant security risk.

Vulnerability Description

PackageKit's apt backend misidentifies all local debs as trusted, contrary to the repository-based trust model.

Affected Systems and Versions

Affected Versions:
PackageKit 1.1.13-2ubuntu1.1
PackageKit 1.1.9-1ubuntu2.18.04.6
PackageKit 0.8.17-4ubuntu6~gcc5.4ubuntu1.5

Exploitation Mechanism

Attack Complexity: Low
Privileges Required: Low
Exploitation may require user interaction.

Mitigation and Prevention

Immediate action and long-term security practices are crucial to mitigate the risks posed by CVE-2020-16122.

Immediate Steps to Take

Update PackageKit to a non-vulnerable version.
Monitor and restrict user permissions for package installations.
Implement strict PolicyKit rules to prevent unauthorized package installations.

Long-Term Security Practices

Regularly update and patch software to address security vulnerabilities.
Conduct security audits to identify and remediate potential risks.

Patching and Updates

Apply security patches provided by PackageKit promptly to address the vulnerability.