CVE-2020-16128 : Security Advisory and Response

A vulnerability in aptdaemon allowed unprivileged users to access file existence information through dbus properties.

Understanding CVE-2020-16128

This CVE discloses details about a security issue in aptdaemon affecting specific versions.

What is CVE-2020-16128?

The vulnerability in aptdaemon's DBus interface allowed unprivileged users to obtain file existence information by manipulating Terminal/DebconfSocket properties.

The Impact of CVE-2020-16128

The vulnerability could lead to unauthorized access to sensitive file existence data by unprivileged users, potentially compromising system security.

Technical Details of CVE-2020-16128

Details about the vulnerability and its implications.

Vulnerability Description

Aptdaemon DBus interface exposed file existence information through Terminal/DebconfSocket properties.

Affected Systems and Versions

Versions prior to 1.1.1+bzr982-0ubuntu34.1, 1.1.1+bzr982-0ubuntu32.3, 1.1.1+bzr982-0ubuntu19.5, 1.1.1+bzr982-0ubuntu14.5 were affected.

Exploitation Mechanism

Unprivileged users could exploit dbus properties to access sensitive file existence data.

Mitigation and Prevention

Steps to address and prevent the vulnerability.

Immediate Steps to Take

Update aptdaemon to a version beyond 1.1.1+bzr982-0ubuntu34.1 to mitigate the issue.
Monitor system logs for any unauthorized access attempts.

Long-Term Security Practices

Regularly update software and apply security patches to prevent similar vulnerabilities.
Implement least privilege access controls to limit unauthorized access.

Patching and Updates

Canonical has released patches to address the vulnerability. Ensure timely installation of these updates.