CVE-2020-20892 : Vulnerability Insights and Analysis

An issue was discovered in function filter_frame in libavfilter/vf_lenscorrection.c in Ffmpeg 4.2.1, allowing attackers to cause a Denial of Service or other unspecified impacts due to a division by zero.

Understanding CVE-2020-20892

This CVE identifies a vulnerability in Ffmpeg 4.2.1 that can be exploited to trigger a Denial of Service attack or other adverse effects.

What is CVE-2020-20892?

The vulnerability lies in the filter_frame function in libavfilter/vf_lenscorrection.c in Ffmpeg 4.2.1, enabling attackers to exploit a division by zero.

The Impact of CVE-2020-20892

The vulnerability can lead to a Denial of Service condition or other unspecified impacts when malicious actors exploit the division by zero issue.

Technical Details of CVE-2020-20892

This section provides more technical insights into the CVE.

Vulnerability Description

The vulnerability in Ffmpeg 4.2.1 arises from a flaw in the filter_frame function in libavfilter/vf_lenscorrection.c, which allows for a division by zero.

Affected Systems and Versions

Affected Version: Ffmpeg 4.2.1
Systems using Ffmpeg 4.2.1 are vulnerable to this issue.

Exploitation Mechanism

Attackers can exploit the vulnerability by triggering a division by zero within the filter_frame function in libavfilter/vf_lenscorrection.c.

Mitigation and Prevention

Protecting systems from CVE-2020-20892 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Ffmpeg to a patched version that addresses the division by zero vulnerability.
Monitor system logs for any unusual activities that could indicate exploitation.

Long-Term Security Practices

Regularly update software and libraries to mitigate known vulnerabilities.
Implement proper input validation to prevent division by zero errors.

Patching and Updates

Apply patches provided by Ffmpeg to fix the vulnerability.
Stay informed about security advisories related to Ffmpeg to apply timely updates.