CVE-2022-21723 : Security Advisory and Response

A detailed overview of the out-of-bounds read vulnerability in multipart parsing in PJSIP.

Understanding CVE-2022-21723

This CVE-2022-21723 addresses an out-of-bounds read vulnerability discovered in the multipart parsing functionality of PJSIP.

What is CVE-2022-21723?

PJSIP, a multimedia communication library written in C language, is affected by an out-of-bounds read issue when parsing malformed multiparts in incoming SIP messages.

The Impact of CVE-2022-21723

The vulnerability affects PJSIP versions 2.11.1 and prior, potentially leading to out-of-bound read access for all users accepting SIP multipart messages.

Technical Details of CVE-2022-21723

An in-depth look into the vulnerability and its technical aspects.

Vulnerability Description

Parsing a malformed multipart SIP message can trigger an out-of-bounds read access, potentially leading to unauthorized disclosure of sensitive information.

Affected Systems and Versions

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

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting malicious SIP messages containing malformed multiparts, exploiting the parsing functionality to read sensitive data.

Mitigation and Prevention

Guidelines to mitigate the risks associated with CVE-2022-21723.

Immediate Steps to Take

Update to the latest patch available in the

master

branch to address the vulnerability.

Long-Term Security Practices

Regularly update PJSIP to the latest versions to ensure security patches are applied promptly.

Patching and Updates

Ensure timely installation of security updates and patches to protect systems against potential exploitation of this vulnerability.