CVE-2020-27764 : Exploit Details and Defense Strategies

CVE-2020-27764 pertains to a vulnerability in ImageMagick versions prior to 6.9.10-69, impacting the ApplyEvaluateOperator() function in /MagickCore/statistic.c. This CVE was published on December 3, 2020, by Red Hat.

Understanding CVE-2020-27764

This section provides insights into the nature and impact of the CVE-2020-27764 vulnerability.

What is CVE-2020-27764?

CVE-2020-27764 involves a flaw in ImageMagick that results from incorrect type casting, potentially leading to out-of-range values when processing malicious input files.

The Impact of CVE-2020-27764

Red Hat Product Security categorized this vulnerability as Low severity due to its potential to affect application availability without demonstrating a specific impact in this instance.

Technical Details of CVE-2020-27764

Explore the technical aspects of CVE-2020-27764 to understand its implications and affected systems.

Vulnerability Description

The vulnerability arises from incorrect size_t casting in ApplyEvaluateOperator(), causing issues with crafted input files in ImageMagick.

Affected Systems and Versions

Vendor: n/a
Product: ImageMagick
Affected Version: ImageMagick 6.9.10-69

Exploitation Mechanism

The vulnerability can be exploited by processing specially crafted input files, triggering out-of-range values in ImageMagick.

Mitigation and Prevention

Learn how to address and prevent the CVE-2020-27764 vulnerability.

Immediate Steps to Take

Update ImageMagick to version 6.9.10-69 or later.
Exercise caution when processing untrusted image files.

Long-Term Security Practices

Regularly update software to patch known vulnerabilities.
Implement input validation mechanisms to prevent malicious file execution.
Monitor security mailing lists for updates on ImageMagick security patches.

Patching and Updates

Ensure timely installation of security updates and patches for ImageMagick to mitigate the CVE-2020-27764 vulnerability.