CVE-2017-12935 : What You Need to Know

GraphicsMagick version 1.3.26 is affected by a vulnerability in the ReadMNGImage function, leading to an incorrect memory read in the SetImageColorCallBack function.

Understanding CVE-2017-12935

This CVE entry describes a vulnerability in GraphicsMagick version 1.3.26 that could be exploited to trigger an incorrect memory read.

What is CVE-2017-12935?

The vulnerability arises from the improper handling of large MNG images in the ReadMNGImage function, resulting in a memory read issue in the SetImageColorCallBack function.

The Impact of CVE-2017-12935

The vulnerability could allow an attacker to execute arbitrary code or cause a denial of service by exploiting the memory read issue in GraphicsMagick.

Technical Details of CVE-2017-12935

GraphicsMagick version 1.3.26 is susceptible to a memory read vulnerability due to improper handling of large MNG images.

Vulnerability Description

The ReadMNGImage function in GraphicsMagick mishandles large MNG images, leading to an invalid memory read in the SetImageColorCallBack function.

Affected Systems and Versions

Product: GraphicsMagick
Vendor: N/A
Version: 1.3.26

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting a malicious MNG image to trigger the incorrect memory read in GraphicsMagick.

Mitigation and Prevention

To address CVE-2017-12935, users and administrators should take immediate steps and adopt long-term security practices.

Immediate Steps to Take

Update GraphicsMagick to a patched version that addresses the memory read vulnerability.
Avoid opening untrusted MNG images with GraphicsMagick until the issue is resolved.

Long-Term Security Practices

Regularly update software and apply security patches promptly.
Implement proper input validation to prevent malformed images from being processed.

Patching and Updates

Ensure that you regularly check for updates from GraphicsMagick and apply patches to mitigate known vulnerabilities.