CVE-2021-21838 : Security Advisory and Response
Discover multiple integer overflow vulnerabilities in GPAC Project's Advanced Content library v1.0.1 with a high impact rating. Learn about the exploitation, affected systems, and mitigation steps.
Multiple exploitable integer overflow vulnerabilities have been identified in the MPEG-4 decoding functionality of the GPAC Project on Advanced Content library v1.0.1. These vulnerabilities can lead to a heap-based buffer overflow, resulting in memory corruption when processing specially crafted MPEG-4 inputs. Attackers can exploit this issue by convincing users to open a malicious video file.
Understanding CVE-2021-21838
This section provides insights into the nature and impact of CVE-2021-21838.
What is CVE-2021-21838?
CVE-2021-21838 refers to multiple integer overflow vulnerabilities in the MPEG-4 decoding function of the GPAC Project on Advanced Content library v1.0.1.
The Impact of CVE-2021-21838
The impact of CVE-2021-21838 is rated as high, with an 8.8 base score in the CVSSv3.0 scoring system. The vulnerability can be exploited remotely and requires user interaction, making it critical for user security.
Technical Details of CVE-2021-21838
This section delves into the technical aspects of CVE-2021-21838, including vulnerability description, affected systems, and exploitation mechanism.
Vulnerability Description
The vulnerability arises due to unchecked arithmetic during MPEG-4 input processing, leading to integer overflow and subsequent heap-based buffer overflow.
Affected Systems and Versions
The affected systems include GPAC Project Advanced Content commit a8a8d412dabcb129e695c3e7d861fcc81f608304 and GPAC Project Advanced Content v1.0.1.
Exploitation Mechanism
An attacker can trigger this vulnerability by crafting a malicious MPEG-4 input and convincing a user to open the infected video.
Mitigation and Prevention
This section outlines steps to mitigate the risks posed by CVE-2021-21838 and prevent potential exploitation.
Immediate Steps to Take
Users are advised to exercise caution when opening video files from untrusted sources and consider applying security updates as soon as they are available.
Long-Term Security Practices
Implementing secure coding practices and regularly updating software can help in reducing the risk of such vulnerabilities.
Patching and Updates
It is crucial to install patches and updates provided by GPAC Project to address the identified integer overflow vulnerabilities in the MPEG-4 decoding functionality.