CVE-2021-20245 : What You Need to Know

A flaw was discovered in ImageMagick that could allow an attacker to trigger undefined behavior, specifically math division by zero, by submitting a crafted file for processing. The primary risk from this vulnerability is to the availability of the system.

Understanding CVE-2021-20245

This section delves into the key aspects of CVE-2021-20245.

What is CVE-2021-20245?

CVE-2021-20245 is a vulnerability found in ImageMagick in coders/webp.c, enabling attackers to exploit math division by zero through a specially crafted file.

The Impact of CVE-2021-20245

The most significant impact of this vulnerability is on system availability, highlighting the importance of prompt mitigation strategies.

Technical Details of CVE-2021-20245

Explore the technical specifics of CVE-2021-20245 below.

Vulnerability Description

The vulnerability arises from a flaw in ImageMagick when processing certain files, leading to math division by zero and subsequent undefined behavior.

Affected Systems and Versions

The vulnerability affects ImageMagick versions 6.9.11-62 and 7.0.10-62.

Exploitation Mechanism

By submitting a specifically crafted file for processing by ImageMagick, attackers can exploit the vulnerability and cause math division by zero.

Mitigation and Prevention

Learn how to mitigate and prevent the risks associated with CVE-2021-20245.

Immediate Steps to Take

Immediately update ImageMagick to the patched version and ensure that suspicious files are not processed.

Long-Term Security Practices

Implement regular security updates, conduct security training for employees, and maintain robust incident response procedures.

Patching and Updates

Regularly check for software updates, subscribe to security mailing lists, and follow best practices in secure software development.