CVE-2020-13753 : Security Advisory and Response

WebkitGTK and WPE WebKit's bubblewrap sandbox, before version 2.28.3, had vulnerabilities that could allow access outside the sandbox.

Understanding CVE-2020-13753

This CVE involves a security issue in the bubblewrap sandbox of WebKitGTK and WPE WebKit.

What is CVE-2020-13753?

The bubblewrap sandbox of WebKitGTK and WPE WebKit, prior to version 2.28.3, failed to properly block access to certain functionalities, potentially allowing access outside the sandbox.

The Impact of CVE-2020-13753

The vulnerability could be exploited to execute commands outside the sandbox, posing a risk to the security of the affected systems.

Technical Details of CVE-2020-13753

Details about the vulnerability and its implications.

Vulnerability Description

The issue in the bubblewrap sandbox of WebKitGTK and WPE WebKit allowed access to CLONE_NEWUSER and the TIOCSTI ioctl, potentially enabling commands execution outside the sandbox.

Affected Systems and Versions

WebKitGTK and WPE WebKit versions prior to 2.28.3

Exploitation Mechanism

CLONE_NEWUSER could confuse xdg-desktop-portal, granting access outside the sandbox.
TIOCSTI could execute commands outside the sandbox by writing to the controlling terminal's input buffer.

Mitigation and Prevention

Ways to address and prevent the CVE-2020-13753 vulnerability.

Immediate Steps to Take

Update WebKitGTK and WPE WebKit to version 2.28.3 or newer.
Monitor system activity for any signs of unauthorized access.

Long-Term Security Practices

Regularly update software and apply security patches promptly.
Implement strong sandboxing mechanisms to restrict access and prevent unauthorized actions.

Patching and Updates

Stay informed about security advisories and apply patches as soon as they are available.