CVE-2021-21861 Explained : Impact and Mitigation
Learn about CVE-2021-21861 impacting GPAC Project Advanced Content library v1.0.1. This high-severity vulnerability allows attackers to trigger memory corruption. Find out about the impact, affected systems, and mitigation strategies.
A detailed article on CVE-2021-21861 impacting GPAC Project Advanced Content library v1.0.1, involving an integer truncation vulnerability leading to a heap-based buffer overflow.
Understanding CVE-2021-21861
This section provides insights into the vulnerability, its impact, technical details, and mitigation strategies.
What is CVE-2021-21861?
The CVE-2021-21861 vulnerability exists in the MPEG-4 decoding functionality of the GPAC Project Advanced Content library v1.0.1. By exploiting this flaw, an attacker can induce a memory corruption through a specially crafted MPEG-4 input.
The Impact of CVE-2021-21861
The vulnerability poses a high severity threat. With a CVSS base score of 8.8, it can cause high impact on confidentiality, integrity, and availability of affected systems.
Technical Details of CVE-2021-21861
This section elaborates on the vulnerability description, affected systems and versions, and the exploitation mechanism.
Vulnerability Description
An integer truncation vulnerability within the GPAC Project's MPEG-4 decoding functionality allows an attacker to trigger a heap-based buffer overflow by manipulating the 'hdlr' FOURCC code.
Affected Systems and Versions
The affected systems include GPAC Project Advanced Content commit a8a8d412dabcb129e695c3e7d861fcc81f608304 and GPAC Project Advanced Content v1.0.1.
Exploitation Mechanism
Attackers can exploit this vulnerability by convincing a user to open a maliciously crafted video, causing memory corruption.
Mitigation and Prevention
This section outlines immediate steps to take, long-term security practices, and the importance of patching and updates.
Immediate Steps to Take
It is recommended to apply security patches provided by the vendor promptly. Users should exercise caution while opening videos from untrusted sources.
Long-Term Security Practices
To enhance overall security posture, organizations should implement secure coding practices, conduct regular security assessments, and educate users on phishing tactics.
Patching and Updates
Regularly monitor for security updates from GPAC Project and promptly apply patches to mitigate the risk associated with CVE-2021-21861.