CVE-2020-27758 : Security Advisory and Response

A flaw in ImageMagick in coders/txt.c could lead to undefined behavior, affecting application availability. This CVE impacts ImageMagick versions prior to 7.0.8-68.

Understanding CVE-2020-27758

What is CVE-2020-27758?

ImageMagick in coders/txt.c is susceptible to triggering undefined behavior due to crafted files, potentially causing issues beyond application availability.

The Impact of CVE-2020-27758

The vulnerability could result in values outside the range of type

unsigned long long

, impacting application availability and potentially causing other problems related to undefined behavior.

Technical Details of CVE-2020-27758

Vulnerability Description

A flaw in ImageMagick in coders/txt.c allows attackers to trigger undefined behavior, affecting values beyond the range of type

unsigned long long

.

Affected Systems and Versions

Vendor: n/a
Product: ImageMagick
Affected Versions: prior to 7.0.8-68

Exploitation Mechanism

The vulnerability can be exploited by submitting a crafted file to ImageMagick, leading to the triggering of undefined behavior.

Mitigation and Prevention

Immediate Steps to Take

Update ImageMagick to version 7.0.8-68 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 files from triggering vulnerabilities.

Patching and Updates

Apply security updates provided by ImageMagick to patch the vulnerability.