CVE-2020-27351 Explained : Impact and Mitigation

Various memory and file descriptor leaks were found in apt-python files python/arfile.cc, python/tag.cc, python/tarfile.cc, aka GHSL-2020-170. This vulnerability affects multiple versions of python-apt on Ubuntu.

Understanding CVE-2020-27351

This CVE identifies memory and file descriptor leaks in apt-python, impacting specific versions of python-apt on Ubuntu.

What is CVE-2020-27351?

CVE-2020-27351 refers to memory and file descriptor leaks discovered in apt-python files, potentially leading to security vulnerabilities.

The Impact of CVE-2020-27351

The vulnerability has a low base score of 2, with a low severity impact. However, it requires high privileges and user interaction, affecting the confidentiality and integrity of systems.

Technical Details of CVE-2020-27351

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability involves memory and file descriptor leaks in specific python-apt files, potentially leading to security risks.

Affected Systems and Versions

python-apt 1.1.0~beta1 versions prior to 1.1.0~beta1ubuntu0.16.04.10
python-apt 1.6.5ubuntu0 versions prior to 1.6.5ubuntu0.4
python-apt 2.0.0ubuntu0 versions prior to 2.0.0ubuntu0.20.04.2
python-apt 2.1.3ubuntu1 versions prior to 2.1.3ubuntu1.1

Exploitation Mechanism

The vulnerability can be exploited locally, with low attack complexity, requiring high privileges and user interaction.

Mitigation and Prevention

Protect your systems from CVE-2020-27351 with the following measures:

Immediate Steps to Take

Update python-apt to the patched versions.
Monitor system logs for any unusual activities.

Long-Term Security Practices

Regularly update software and apply security patches.
Implement least privilege access controls to limit potential damage.

Patching and Updates

Ensure timely installation of security updates and patches to mitigate the risk of exploitation.