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CVE-2021-21841 Explained : Impact and Mitigation

Discover the impact of CVE-2021-21841, an integer overflow vulnerability in GPAC Project's Advanced Content library v1.0.1, allowing attackers to trigger memory corruption through crafted MPEG-4 input.

An integer overflow vulnerability has been discovered in the MPEG-4 decoding functionality of the GPAC Project's Advanced Content library v1.0.1, allowing a specially crafted input to trigger a heap-based buffer overflow. This can lead to memory corruption with high impact severity.

Understanding CVE-2021-21841

This section will delve into the details of the CVE-2021-21841 vulnerability.

What is CVE-2021-21841?

The CVE-2021-21841 vulnerability involves an exploitable integer overflow within GPAC Project's Advanced Content library v1.0.1, triggered by malformed MPEG-4 input. This flaw can result in a heap-based buffer overflow, enabling an attacker to corrupt memory by convincing a user to open a video.

The Impact of CVE-2021-21841

The impact of CVE-2021-21841 is significant, with high severity ratings across multiple vectors including confidentiality, integrity, and availability. The exploitation of this vulnerability could lead to serious security breaches.

Technical Details of CVE-2021-21841

Explore the technical aspects and specifics of the CVE-2021-21841 vulnerability.

Vulnerability Description

The vulnerability arises from an unchecked arithmetic operation when processing 'sbgp' FOURCC code within MPEG-4 input, resulting in an integer overflow. This overflow leads to a heap-based buffer overflow, causing memory corruption.

Affected Systems and Versions

GPAC Project Advanced Content library v1.0.1 is confirmed to be affected by this vulnerability. All versions up to this release may be susceptible to exploitation.

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting malicious MPEG-4 inputs containing 'sbgp' FOURCC code to trigger the integer overflow, leading to memory corruption.

Mitigation and Prevention

Learn how to mitigate and prevent the CVE-2021-21841 vulnerability from being exploited.

Immediate Steps to Take

Users are advised to update to the latest secure version of GPAC Project Advanced Content library to mitigate the vulnerability. Exercise caution when opening video files from untrusted sources.

Long-Term Security Practices

Implement secure coding practices with input validation and bounds checking to prevent integer overflows. Regularly update and patch software to address known vulnerabilities.

Patching and Updates

Stay informed about security advisories and patches released by GPAC Project to address the CVE-2021-21841 vulnerability.

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