CVE-2021-21854 : Exploit Details and Defense Strategies

A detailed overview of CVE-2021-21854, a vulnerability in the GPAC Project on Advanced Content library v1.0.1.

Understanding CVE-2021-21854

This section provides insights into the nature and impact of the CVE-2021-21854 vulnerability.

What is CVE-2021-21854?

Multiple exploitable integer overflow vulnerabilities exist within the MPEG-4 decoding functionality of the GPAC Project on Advanced Content library v1.0.1. A specially crafted MPEG-4 input can cause an integer overflow due to unchecked addition arithmetic, leading to a heap-based buffer overflow and memory corruption. Attackers can exploit this by convincing users to open a video file.

The Impact of CVE-2021-21854

With a CVSS base score of 8.8, the impact of CVE-2021-21854 is categorized as high, affecting confidentiality, integrity, and availability. The vulnerability poses a significant risk due to the potential memory corruption it can cause.

Technical Details of CVE-2021-21854

Explore the specific technical details related to CVE-2021-21854 to understand its implications better.

Vulnerability Description

The vulnerability arises from integer overflow to buffer overflow in the MPEG-4 decoding feature of the GPAC Project on Advanced Content library v1.0.1.

Affected Systems and Versions

GPAC Project Advanced Content commit a8a8d412dabcb129e695c3e7d861fcc81f608304 and GPAC Project Advanced Content v1.0.1 are the affected versions.

Exploitation Mechanism

By leveraging specially crafted MPEG-4 files, attackers can trigger the integer overflow vulnerability, eventually leading to memory corruption.

Mitigation and Prevention

Discover the essential steps to mitigate and prevent the exploitation of CVE-2021-21854.

Immediate Steps to Take

Users should exercise caution when opening MPEG-4 files from untrusted sources to mitigate the risk of exploitation.

Long-Term Security Practices

Implement robust security practices, such as regular software updates and security monitoring, to enhance overall system security.

Patching and Updates

Ensure that systems running affected versions of the GPAC Project on Advanced Content library are promptly patched with the latest updates to eliminate the vulnerability.