CVE-2021-21835 : What You Need to Know
Learn about CVE-2021-21835, an integer overflow vulnerability in GPAC Project Advanced Content library v1.0.1. Discover its impact, affected systems, and mitigation steps.
An integer overflow vulnerability in the GPAC Project Advanced Content library v1.0.1 could allow an attacker to trigger heap-based buffer overflow through manipulated MPEG-4 content.
Understanding CVE-2021-21835
This CVE involves an exploitable integer overflow vulnerability within the MPEG-4 decoding functionality of the GPAC Project on the Advanced Content library v1.0.1.
What is CVE-2021-21835?
CVE-2021-21835 is an integer overflow vulnerability in GPAC Project Advanced Content library v1.0.1, allowing attackers to exploit memory corruption by manipulating MPEG-4 content.
The Impact of CVE-2021-21835
The vulnerability carries a CVSS base score of 8.8 (High), with a significant impact on confidentiality, integrity, and availability of affected systems.
Technical Details of CVE-2021-21835
This section delves into the specifics of the vulnerability, including its description, affected systems, and exploitation mechanism.
Vulnerability Description
The flaw arises from unchecked arithmetic during the decoding of MPEG-4 atoms associated with the "csgp" FOURCC, leading to heap-based buffer overflow and subsequent memory corruption.
Affected Systems and Versions
GPAC Project Advanced Content commit a8a8d412dabcb129e695c3e7d861fcc81f608304 and GPAC Project Advanced Content v1.0.1 versions are impacted by this vulnerability.
Exploitation Mechanism
By persuading a user to open a specially crafted video file, an attacker can trigger the vulnerability, possibly resulting in arbitrary code execution.
Mitigation and Prevention
Here we discuss the steps to mitigate the risks posed by CVE-2021-21835 and ensure long-term security measures.
Immediate Steps to Take
Users are advised to avoid opening untrusted MPEG-4 content or video files from unknown sources to prevent exploitation of this vulnerability.
Long-Term Security Practices
Implementing regular security updates and patches, practicing secure coding standards, and conducting security audits are essential for maintaining system integrity.
Patching and Updates
Vendor-provided patches should be promptly applied to address the vulnerability and enhance system security.