CVE-2021-38093 : Security Advisory and Response

This CVE-2021-38093 article provides details about an Integer Overflow vulnerability in Ffmpeg 4.2.1 that could lead to Denial of Service attacks or other unspecified impacts.

Understanding CVE-2021-38093

This section explains the vulnerability further.

What is CVE-2021-38093?

CVE-2021-38093 is an Integer Overflow vulnerability located in the function filter_robert in libavfilter/vf_convolution.c in Ffmpeg 4.2.1. It allows malicious actors to trigger Denial of Service attacks and other potential impacts.

The Impact of CVE-2021-38093

The vulnerability can result in Denial of Service attacks or other undefined impacts, posing a risk to affected systems.

Technical Details of CVE-2021-38093

This section delves into the technical aspects of the CVE.

Vulnerability Description

The Integer Overflow vulnerability in Ffmpeg 4.2.1 arises in the filter_robert function in libavfilter/vf_convolution.c. Attackers can exploit this issue to orchestrate Denial of Service attacks and potentially cause other harm.

Affected Systems and Versions

Affected Versions: Ffmpeg 4.2.1
Affected Products: Not applicable
Affected Vendor: Not applicable

Exploitation Mechanism

The vulnerability is triggered through the filter_robert function in libavfilter/vf_convolution.c, leading to potential Denial of Service and other security consequences.

Mitigation and Prevention

Explore the measures to mitigate the CVE impact.

Immediate Steps to Take

Update Ffmpeg to the latest version to patch the vulnerability.
Monitor security advisories for any official patches or workarounds.

Long-Term Security Practices

Implement code reviews and testing to detect and prevent such vulnerabilities.
Enhance security training to educate developers on secure coding practices.

Patching and Updates

Regularly apply security patches and updates for Ffmpeg to address vulnerabilities promptly.