CVE-2018-14345 : What You Need to Know

A vulnerability has been found in SDDM up to version 0.17.0 that allows unauthorized users to potentially unlock any graphical session.

Understanding CVE-2018-14345

This CVE identifies a security flaw in SDDM versions up to 0.17.0 that could be exploited by users with access to the system D-Bus.

What is CVE-2018-14345?

The vulnerability arises when the configuration option ReuseSession=true is enabled, leading to a failure in password verification for users with active sessions.

The Impact of CVE-2018-14345

Unauthorized users could exploit this flaw to unlock any graphical session on the affected system, compromising its security.

Technical Details of CVE-2018-14345

This section delves into the technical aspects of the vulnerability.

Vulnerability Description

The issue in SDDM versions up to 0.17.0 allows users with system D-Bus access to bypass password verification for active sessions, potentially unlocking any graphical session.

Affected Systems and Versions

Affected software: SDDM up to version 0.17.0

Exploitation Mechanism

The vulnerability can be exploited by users with access to the system D-Bus, enabling them to unlock graphical sessions without proper password verification.

Mitigation and Prevention

To address CVE-2018-14345, follow these mitigation strategies:

Immediate Steps to Take

Disable the ReuseSession configuration option in SDDM.
Monitor system logs for any suspicious activity related to session unlocking.

Long-Term Security Practices

Regularly update SDDM to the latest version to patch known vulnerabilities.
Restrict access to the system D-Bus to authorized users only.

Patching and Updates

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