CVE-2021-21848 : Security Advisory and Response

An integer overflow vulnerability has been identified in the GPAC Project's Advanced Content library version 1.0.1, allowing for a heap-based buffer overflow. This could be triggered by parsing specific video content.

Understanding CVE-2021-21848

This vulnerability affects the MPEG-4 decoding functionality of the GPAC Project, potentially leading to memory corruption.

What is CVE-2021-21848?

CVE-2021-21848 is an integer overflow vulnerability in the GPAC Project's Advanced Content library v1.0.1. Attackers can exploit this issue by tricking users into opening a malicious video file.

The Impact of CVE-2021-21848

With a CVSS base score of 8.8, this vulnerability has a high severity level and can result in confidentiality, integrity, and availability impacts.

Technical Details of CVE-2021-21848

This section dives into the specifics of the vulnerability.

Vulnerability Description

The flaw arises from unchecked arithmetic during the reuse of the parser, potentially causing a heap-based buffer overflow due to an integer overflow.

Affected Systems and Versions

GPAC Project Advanced Content commit a8a8d412dabcb129e695c3e7d861fcc81f608304 and GPAC Project Advanced Content v1.0.1 are known to be affected.

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating specific video content to trigger the heap-based buffer overflow.

Mitigation and Prevention

Protecting systems from CVE-2021-21848 involves taking immediate steps and adopting long-term security practices.

Immediate Steps to Take

Users should avoid opening untrusted video files, and organizations must apply security patches promptly.

Long-Term Security Practices

Implementing robust security measures, such as network segmentation and user awareness training, can help prevent similar vulnerabilities.

Patching and Updates

Stay informed about security updates released by the GPAC Project to address this vulnerability.