CVE-2017-11642 : Vulnerability Insights and Analysis

GraphicsMagick version 1.3.26 is vulnerable to a NULL pointer dereference in the WriteMAPImage() function when processing non-colormapped images.

Understanding CVE-2017-11642

This CVE entry highlights a specific vulnerability in GraphicsMagick version 1.3.26 that can lead to a NULL pointer dereference.

What is CVE-2017-11642?

The WriteMAPImage() function in coders/map.c within GraphicsMagick version 1.3.26 experiences a NULL pointer dereference when handling a non-colormapped image. This vulnerability is distinct from CVE-2017-11638.

The Impact of CVE-2017-11642

The vulnerability can potentially lead to a denial of service (DoS) condition or could be exploited by attackers to execute arbitrary code.

Technical Details of CVE-2017-11642

GraphicsMagick 1.3.26 has a NULL pointer dereference in the WriteMAPImage() function in coders/map.c when processing a non-colormapped image, a different vulnerability than CVE-2017-11638.

Vulnerability Description

The vulnerability arises from improper handling of non-colormapped images, leading to a NULL pointer dereference.

Affected Systems and Versions

Affected Version: 1.3.26
Product: GraphicsMagick

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting a malicious non-colormapped image to trigger the NULL pointer dereference.

Mitigation and Prevention

It is crucial to take immediate steps to mitigate the risks posed by CVE-2017-11642.

Immediate Steps to Take

Update GraphicsMagick to a patched version that addresses the NULL pointer dereference issue.
Implement proper input validation to prevent the processing of malicious images.

Long-Term Security Practices

Regularly update and patch software to address known vulnerabilities.
Conduct security assessments and audits to identify and remediate potential weaknesses.

Patching and Updates

Stay informed about security advisories and updates released by GraphicsMagick.
Apply patches promptly to ensure the security of your systems.