CVE-2020-27759 : Exploit Details and Defense Strategies

CVE-2020-27759, assigned by Red Hat, involves a vulnerability in ImageMagick prior to version 7.0.8-68 that could allow an attacker to impact application availability.

Understanding CVE-2020-27759

In the IntensityCompare() function of /MagickCore/quantize.c, a casting issue led to returning values outside the range of type

int

, potentially triggered by a crafted input file in ImageMagick.

What is CVE-2020-27759?

The vulnerability in ImageMagick could result in returning values beyond the

int

range, affecting application availability.

The Impact of CVE-2020-27759

Red Hat Product Security classified this as Low severity due to the lack of specific demonstrated impact, although it poses a risk to application availability.

Technical Details of CVE-2020-27759

Vulnerability Description

The flaw in ImageMagick's IntensityCompare() function allowed returning values outside the

int

range.

Affected Systems and Versions

Vendor: n/a
Product: ImageMagick
Affected Version: ImageMagick 7.0.8-68

Exploitation Mechanism

Crafted input files processed by ImageMagick could trigger the vulnerability.

Mitigation and Prevention

Immediate Steps to Take

Update ImageMagick to version 7.0.8-68 or later.
Monitor for any unusual application behavior.

Long-Term Security Practices

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

Patching and Updates

Apply security patches provided by ImageMagick to address the vulnerability.