CVE-2020-27755 : What You Need to Know

ImageMagick prior to 7.0.9-0 is affected by a memory leak vulnerability in SetImageExtent() that could lead to denial of service.

Understanding CVE-2020-27755

This CVE involves a flaw in ImageMagick versions prior to 7.0.9-0 that could result in a memory leak and impact application reliability.

What is CVE-2020-27755?

In SetImageExtent() of /MagickCore/image.c, an incorrect image depth size can cause a memory leak due to improper size checking, potentially triggered by a crafted input file.

The Impact of CVE-2020-27755

The vulnerability could lead to a denial of service by exploiting the memory leak, affecting the reliability of applications utilizing ImageMagick.

Technical Details of CVE-2020-27755

ImageMagick's vulnerability details and affected systems.

Vulnerability Description

Incorrect image depth size in SetImageExtent() can cause a memory leak
The flaw arises from improper size checking without resetting in case of an invalid size

Affected Systems and Versions

Product: ImageMagick
Versions affected: prior to 7.0.9-0

Exploitation Mechanism

Crafted input files processed by ImageMagick can trigger the memory leak

Mitigation and Prevention

Protective measures and steps to address CVE-2020-27755.

Immediate Steps to Take

Apply the patch provided by ImageMagick to reset the depth size
Monitor for any unusual memory consumption that could indicate exploitation

Long-Term Security Practices

Regularly update ImageMagick to the latest version to mitigate known vulnerabilities
Implement input validation mechanisms to prevent crafted file exploitation

Patching and Updates

Update ImageMagick to version 7.0.9-0 or later to eliminate the memory leak vulnerability