CVE-2020-27837 : Vulnerability Insights and Analysis
Discover the impact of CVE-2020-27837, a GDM flaw allowing unauthorized access to user sessions. Learn about affected versions and mitigation steps.
A flaw was found in GDM in versions prior to 3.38.2.1, allowing unauthorized access to a user's session under specific conditions.
Understanding CVE-2020-27837
What is CVE-2020-27837?
This CVE identifies a race condition in GDM that enables bypassing the lock screen for users with autologin, granting access without authentication.
The Impact of CVE-2020-27837
The vulnerability poses a security risk by potentially allowing unauthorized access to user sessions, compromising privacy and data security.
Technical Details of CVE-2020-27837
Vulnerability Description
A race condition in GDM's session shutdown handling permits unauthorized access to user sessions with autologin enabled.
Affected Systems and Versions
- Product: GDM
- Vendor: N/A
- Versions Affected: Prior to 3.38.2.1
Exploitation Mechanism
The flaw requires specific conditions to exploit, similar to CVE-2017-12164 but with more challenging requirements.
Mitigation and Prevention
Immediate Steps to Take
- Disable autologin for affected users if possible.
- Monitor for unauthorized access or unusual activity.
Long-Term Security Practices
- Regularly update GDM to the latest version to patch known vulnerabilities.
Patching and Updates
Apply the latest GDM version (3.38.2.1 or newer) to mitigate the vulnerability.