CVE-2021-41141 Explained : Impact and Mitigation

This CVE involves a vulnerability in the PJSIP multimedia communication library that could lead to a denial of service due to missing release of locks.

Understanding CVE-2021-41141

What is CVE-2021-41141?

PJSIP, an open-source multimedia communication library, encounters an issue where locks are not released upon error occurrences, potentially causing system deadlock and denial of service. The vulnerability affects versions up to and including 2.11.1.

The Impact of CVE-2021-41141

The vulnerability may lead to a denial of service for users due to potential system deadlock caused by the missing release of locks in PJSIP.

Technical Details of CVE-2021-41141

Vulnerability Description

When errors or failures occur in PJSIP, the affected functions do not release locks, leading to a system deadlock scenario.

Affected Systems and Versions

Vendor: pjsip
Product: pjproject
Affected Versions: <= 2.11.1

Exploitation Mechanism

The vulnerability could be exploited by causing specific errors or failures in PJSIP to trigger the issue of locks not being released, potentially leading to system deadlock.

Mitigation and Prevention

Immediate Steps to Take

Users are advised to manually apply the patch provided until an official release containing the fix becomes available.

Long-Term Security Practices

Regularly monitor for security advisories and updates related to PJSIP.
Implement secure coding practices to reduce the likelihood of similar vulnerabilities.

Patching and Updates

Users should apply the official patch release once it is made available to address the vulnerability.