CVE-2021-42762 : Vulnerability Insights and Analysis

BubblewrapLauncher.cpp in WebKitGTK and WPE WebKit before 2.34.1 allows a limited sandbox bypass that tricks host processes, impacting services creating UNIX sockets. Find out more about the impact, technical details, and mitigation.

Understanding CVE-2021-42762

This CVE involves a sandbox bypass in WebKitGTK and WPE WebKit, affecting UNIX socket manipulation.

What is CVE-2021-42762?

CVE-2021-42762 allows a sandboxed process to mislead host processes into believing it is not confined by the sandbox, utilizing VFS syscalls to manipulate its filesystem namespace.

The Impact of CVE-2021-42762

This vulnerability affects services within the host that establish UNIX sockets mounted inside the WebKit sandbox. The sandboxed process, however, remains constrained within the sandbox.

Technical Details of CVE-2021-42762

This section dives into the specifics of the vulnerability.

Vulnerability Description

BubblewrapLauncher.cpp in WebKitGTK and WPE WebKit before 2.34.1 permits a sandbox escape, manipulating VFS syscalls.

Affected Systems and Versions

Products: N/A
Versions: N/A

Exploitation Mechanism

The vulnerability allows a sandboxed process to deceive host processes regarding its confinement status, leveraging VFS syscalls.

Mitigation and Prevention

Discover the necessary steps to address and prevent exploitation.

Immediate Steps to Take

Apply patches or updates promptly
Monitor for any suspicious activities

Long-Term Security Practices

Conduct regular security assessments
Implement strong sandboxing mechanisms

Patching and Updates

Update to WebKit versions 2.34.1 or above to address this vulnerability