CVE-2020-27774 : Exploit Details and Defense Strategies

A flaw in ImageMagick could lead to undefined behavior due to a too large shift for 64-bit type

ssize_t

, impacting application availability.

Understanding CVE-2020-27774

What is CVE-2020-27774?

ImageMagick in MagickCore/statistic.c is vulnerable to triggering undefined behavior when processing crafted files, affecting versions prior to 7.0.9-0.

The Impact of CVE-2020-27774

The vulnerability could result in application unavailability and potential issues related to undefined behavior.

Technical Details of CVE-2020-27774

Vulnerability Description

The flaw in ImageMagick allows an attacker to exploit a too large shift for

ssize_t

, leading to undefined behavior.

Affected Systems and Versions

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

Exploitation Mechanism

Attackers can exploit the vulnerability by submitting crafted files 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 on systems processing ImageMagick files.

Long-Term Security Practices

Regularly update software to patch known vulnerabilities.
Implement file type validation checks to prevent malicious inputs.

Patching and Updates

Apply security updates provided by ImageMagick to address the vulnerability.