CVE-2021-46239 : Exploit Details and Defense Strategies
Learn about CVE-2021-46239, a vulnerability in MP4Box in GPAC v1.1.0 that could lead to a Denial of Service (DoS) attack. Find out how to mitigate and prevent this security issue.
A vulnerability in the binary MP4Box in GPAC v1.1.0 can result in a Denial of Service (DoS) attack.
Understanding CVE-2021-46239
What is CVE-2021-46239?
The vulnerability exists in the function gf_free() in utils/alloc.c of MP4Box in GPAC v1.1.0, allowing for an invalid free operation.
The Impact of CVE-2021-46239
The vulnerability could lead to a Denial of Service (DoS) attack, where an attacker could exploit it to crash the application, rendering it unavailable.
Technical Details of CVE-2021-46239
Vulnerability Description
MP4Box in GPAC v1.1.0 contains an invalid free vulnerability through the function gf_free() in utils/alloc.c.
Affected Systems and Versions
- Affected Product: MP4Box in GPAC v1.1.0
- Vendor: N/A
- Affected Version: N/A
Exploitation Mechanism
The vulnerability could be exploited by an attacker to trigger a DoS attack by performing a specific operation that triggers the invalid free operation.
Mitigation and Prevention
Immediate Steps to Take
- Disable or restrict access to MP4Box in GPAC v1.1.0 if not essential
- Implement network-level controls to detect and block malicious attempts
Long-Term Security Practices
- Regularly update software and apply patches promptly
- Conduct security audits and code reviews to identify and address vulnerabilities proactively
Patching and Updates
- Check for patches or updates from the vendor to address the vulnerability in MP4Box in GPAC v1.1.0