CVE-2017-11540 : What You Need to Know
Learn about CVE-2017-11540 affecting ImageMagick 7.0.6-1. Understand the impact, affected systems, exploitation, and mitigation steps to prevent the heap-based buffer over-read vulnerability.
ImageMagick 7.0.6-1 is vulnerable to a heap-based buffer over-read when processing manipulated files using convert.
Understanding CVE-2017-11540
What is CVE-2017-11540?
A vulnerability in ImageMagick 7.0.6-1 can lead to a heap-based buffer over-read in the GetPixelIndex() function, triggered during file processing with convert.
The Impact of CVE-2017-11540
This vulnerability can be exploited to cause a heap-based buffer over-read, potentially leading to information disclosure or denial of service.
Technical Details of CVE-2017-11540
Vulnerability Description
The vulnerability occurs in the GetPixelIndex() function called from the WritePICONImage function in coders/xpm.c when processing manipulated files with convert in ImageMagick 7.0.6-1.
Affected Systems and Versions
- Product: ImageMagick
- Vendor: N/A
- Versions: 7.0.6-1
Exploitation Mechanism
The vulnerability is exploited by processing a crafted file using the convert function in ImageMagick, triggering the heap-based buffer over-read in the GetPixelIndex() function.
Mitigation and Prevention
Immediate Steps to Take
- Update ImageMagick to a non-vulnerable version.
- Avoid processing untrusted or manipulated files with convert.
Long-Term Security Practices
- Regularly update software and libraries to patch known vulnerabilities.
- Implement file input validation to prevent processing of malicious files.
Patching and Updates
Apply patches provided by ImageMagick to address the vulnerability.