CVE-2021-21850 : What You Need to Know
Learn about CVE-2021-21850, an integer overflow vulnerability in GPAC Project on Advanced Content library v1.0.1 leading to memory corruption. Find out the impact, affected systems, and mitigation steps.
GPAC Project on Advanced Content library v1.0.1 is prone to an integer overflow vulnerability that can lead to a heap-based buffer overflow. Attackers can exploit this flaw by convincing users to open a maliciously crafted MPEG-4 input, resulting in memory corruption.
Understanding CVE-2021-21850
This section dives into the details of the CVE-2021-21850 vulnerability.
What is CVE-2021-21850?
CVE-2021-21850 is an integer overflow vulnerability in the MPEG-4 decoding functionality of the GPAC Project on Advanced Content library v1.0.1. It occurs when processing a specially crafted MPEG-4 input, leading to a heap-based buffer overflow.
The Impact of CVE-2021-21850
The vulnerability can be exploited by attackers to trigger memory corruption, potentially compromising the confidentiality, integrity, and availability of affected systems.
Technical Details of CVE-2021-21850
In this section, we explore the technical aspects of CVE-2021-21850.
Vulnerability Description
The integer overflow vulnerability arises due to unchecked arithmetic when processing certain MPEG-4 atoms, specifically those using the 'trun' FOURCC code. This can result in a heap-based buffer overflow.
Affected Systems and Versions
GPAC Project Advanced Content commit a8a8d412dabcb129e695c3e7d861fcc81f608304 and GPAC Project Advanced Content v1.0.1 are known to be affected by this vulnerability.
Exploitation Mechanism
An attacker can exploit CVE-2021-21850 by creating a specially crafted MPEG-4 input and convincing a user to open it, triggering the integer overflow and subsequent heap-based buffer overflow.
Mitigation and Prevention
This section outlines steps to mitigate the risks associated with CVE-2021-21850.
Immediate Steps to Take
Users are advised to exercise caution when opening MPEG-4 files from untrusted sources. Applying security patches promptly is crucial to prevent exploitation.
Long-Term Security Practices
Adopting secure coding practices, conducting regular security audits, and staying informed about potential vulnerabilities can enhance overall security posture.
Patching and Updates
Vendors typically release patches to address vulnerabilities like CVE-2021-21850. Ensure that systems are updated with the latest security fixes to safeguard against known threats.