CVE-2017-11637 : Vulnerability Insights and Analysis
Learn about CVE-2017-11637, a vulnerability in GraphicsMagick 1.3.26 that allows attackers to trigger a NULL pointer dereference, potentially leading to a denial of service or code execution. Find mitigation steps and patching information here.
GraphicsMagick version 1.3.26 has a vulnerability that leads to a NULL pointer dereference issue during the writing of monochrome images.
Understanding CVE-2017-11637
What is CVE-2017-11637?
CVE-2017-11637 is a vulnerability in GraphicsMagick version 1.3.26 that triggers a NULL pointer dereference in the WritePCLImage() function.
The Impact of CVE-2017-11637
This vulnerability can be exploited to cause a denial of service (DoS) by crashing the application or potentially executing arbitrary code.
Technical Details of CVE-2017-11637
Vulnerability Description
The issue occurs in the WritePCLImage() function within the pcl.c file in the coders directory of GraphicsMagick.
Affected Systems and Versions
- Affected Version: GraphicsMagick 1.3.26
- Systems using this version for processing monochrome images
Exploitation Mechanism
Attackers can exploit this vulnerability by crafting a malicious monochrome image file to trigger the NULL pointer dereference.
Mitigation and Prevention
Immediate Steps to Take
- Update GraphicsMagick to a patched version that addresses the NULL pointer dereference.
- Avoid processing untrusted monochrome image files until the patch is applied.
Long-Term Security Practices
- Regularly update software and libraries to prevent known vulnerabilities.
- Implement input validation mechanisms to filter out potentially malicious image files.
Patching and Updates
Apply the security patches provided by GraphicsMagick to fix the vulnerability and prevent exploitation.