CVE-2021-21857 : Vulnerability Insights and Analysis

A high-severity CVE-2021-21857 has been identified in the GPAC Project on Advanced Content library v1.0.1, involving multiple exploitable integer overflow vulnerabilities. Attackers can exploit these vulnerabilities to trigger heap-based buffer overflows that result in memory corruption.

Understanding CVE-2021-21857

This section provides insights into the impact, technical details, and mitigation strategies related to CVE-2021-21857.

What is CVE-2021-21857?

CVE-2021-21857 involves integer overflow vulnerabilities within the MPEG-4 decoding functionality of the GPAC Project Advanced Content library v1.0.1. By manipulating specially crafted MPEG-4 inputs, attackers can trigger heap-based buffer overflows leading to memory corruption.

The Impact of CVE-2021-21857

With a CVSS base score of 8.8, CVE-2021-21857 poses a high severity risk. The vulnerabilities can be exploited remotely without requiring privileges, potentially leading to significant confidentiality, integrity, and availability impacts.

Technical Details of CVE-2021-21857

Explore the specific aspects of the vulnerability in this section.

Vulnerability Description

The unchecked addition arithmetic within the MPEG-4 decoding functionality of GPAC Project v1.0.1 leads to integer overflow. This, in turn, triggers a heap-based buffer overflow, enabling attackers to corrupt memory.

Affected Systems and Versions

The vulnerabilities impact GPAC Project Advanced Content commit a8a8d412dabcb129e695c3e7d861fcc81f608304 and GPAC Project Advanced Content v1.0.1.

Exploitation Mechanism

Attackers can exploit these vulnerabilities by convincing users to open a malicious video crafted to trigger the heap-based buffer overflow.

Mitigation and Prevention

This section outlines steps to mitigate the risks associated with CVE-2021-21857.

Immediate Steps to Take

Users are advised to avoid opening suspicious or untrusted MPEG-4 videos. Implementing robust endpoint security solutions can help detect and prevent exploitation attempts.

Long-Term Security Practices

Regularly update the GPAC Project Advanced Content library to the latest secure versions. Stay informed about security advisories and patches released by the vendor.

Patching and Updates

Apply security patches provided by the vendor promptly to address the identified vulnerabilities and enhance the overall security posture of the system.