CVE-2020-27773 : Security Advisory and Response

A flaw in ImageMagick could lead to undefined behavior and potential application availability impact.

Understanding CVE-2020-27773

What is CVE-2020-27773?

ImageMagick in MagickCore/gem-private.h is vulnerable to triggering undefined behavior due to crafted files, potentially causing issues like values outside the range of type

unsigned char

or division by zero.

The Impact of CVE-2020-27773

This vulnerability could affect application availability and lead to various problems related to undefined behavior.

Technical Details of CVE-2020-27773

Vulnerability Description

The flaw in ImageMagick versions prior to 7.0.9-0 could result in undefined behavior, impacting the processing of crafted files.

Affected Systems and Versions

Vendor: n/a
Product: ImageMagick
Vulnerable Version: ImageMagick 7.0.9-0

Exploitation Mechanism

The vulnerability can be exploited by an attacker submitting a specially crafted file for processing by ImageMagick.

Mitigation and Prevention

Immediate Steps to Take

Update ImageMagick to version 7.0.9-0 or later.
Monitor for any unusual behavior in ImageMagick processing.

Long-Term Security Practices

Regularly update software to the latest versions.
Implement file input validation to prevent crafted file exploitation.

Patching and Updates

Apply security updates provided by ImageMagick to patch the vulnerability.