CVE-2020-16125 : What You Need to Know

A vulnerability in GDM3 versions before 3.36.2 or 3.38.2 could allow a local user to create a new privileged account.

Understanding CVE-2020-16125

This CVE involves a security issue in GDM3 that could lead to the execution of gnome-initial-setup under certain conditions.

What is CVE-2020-16125?

The vulnerability allows the execution of gnome-initial-setup if GDM3 fails to contact the accountservice service via dbus promptly. This could potentially enable a local user to create a new privileged account.

The Impact of CVE-2020-16125

The vulnerability has a CVSS base score of 7.2, indicating a high severity level with impacts on confidentiality, integrity, and availability.

Technical Details of CVE-2020-16125

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The issue arises in GDM3 versions prior to 3.36.2 or 3.38.2, where gnome-initial-setup may be initiated if accountservice cannot be reached promptly via dbus.

Affected Systems and Versions

Product: GDM3
Vendor: Gnome
Versions Affected: 3.36 (less than 3.36.2) and 3.38 (less than 3.38.2)

Exploitation Mechanism

The vulnerability can be exploited by a local user to trigger gnome-initial-setup, potentially leading to the creation of a new privileged account.

Mitigation and Prevention

Protecting systems from CVE-2020-16125 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update GDM3 to versions 3.36.2 or 3.38.2 or newer to mitigate the vulnerability.
Monitor for any unauthorized account creations.

Long-Term Security Practices

Regularly update software and apply security patches promptly.
Implement least privilege access controls to limit user capabilities.

Patching and Updates

Apply the latest patches and updates provided by Gnome to address the vulnerability.