CVE-2020-25675 : What You Need to Know

CVE-2020-25675 is a vulnerability in ImageMagick that could lead to integer overflow and out-of-range values due to rounding calculations on unconstrained pixel offsets. This could result in application availability issues or other problems related to undefined behavior when processing untrusted input data.

Understanding CVE-2020-25675

In the CropImage() and CropImageToTiles() routines of MagickCore/transform.c, rounding calculations on unconstrained pixel offsets caused integer overflow and out-of-range values, leading to undefined behavior.

What is CVE-2020-25675?

This CVE affects ImageMagick versions prior to 7.0.9-0 and introduces functionality to constrain pixel offsets to prevent integer overflow and out-of-range values.

The Impact of CVE-2020-25675

The vulnerability could negatively impact application availability and cause issues related to undefined behavior when processing untrusted input data.

Technical Details of CVE-2020-25675

Vulnerability Description

The flaw in ImageMagick's CropImage() and CropImageToTiles() routines caused integer overflow and out-of-range values due to rounding calculations on unconstrained pixel offsets.

Affected Systems and Versions

Vendor: n/a
Product: ImageMagick
Affected Versions: prior to 7.0.9-0

Exploitation Mechanism

The vulnerability could be exploited by processing untrusted input data, triggering integer overflow and out-of-range values.

Mitigation and Prevention

Immediate Steps to Take

Update ImageMagick to version 7.0.9-0 or later.
Avoid processing untrusted input data with ImageMagick.

Long-Term Security Practices

Regularly update software to the latest versions.
Implement input validation mechanisms to prevent similar vulnerabilities.

Patching and Updates

Apply the upstream patch that constrains pixel offsets to prevent integer overflow and out-of-range values.