CVE-2017-11639 : Exploit Details and Defense Strategies

ImageMagick 7.0.6-1 is susceptible to a heap-based buffer over-read vulnerability when processing specially crafted files using the convert command.

Understanding CVE-2017-11639

A heap-based buffer over-read issue in the WriteCIPImage() function in coders/cip.c of ImageMagick 7.0.6-1 can be exploited by manipulating files with the convert command.

What is CVE-2017-11639?

The vulnerability is directly associated with the GetPixelLuma function in MagickCore/pixel-accessor.h.

The Impact of CVE-2017-11639

The vulnerability allows an attacker to trigger a heap-based buffer over-read, potentially leading to information disclosure or denial of service.

Technical Details of CVE-2017-11639

ImageMagick 7.0.6-1 is affected by a heap-based buffer over-read vulnerability.

Vulnerability Description

The vulnerability occurs in the WriteCIPImage() function in coders/cip.c when processing manipulated files with the convert command.

Affected Systems and Versions

Product: ImageMagick 7.0.6-1
Vendor: N/A
Version: N/A

Exploitation Mechanism

The vulnerability is exploited by crafting files to trigger the heap-based buffer over-read in the affected function.

Mitigation and Prevention

Immediate Steps to Take:

Update ImageMagick to the latest version.
Avoid processing files from untrusted sources.

Long-Term Security Practices

Regularly monitor security advisories for ImageMagick.
Implement file input validation mechanisms.

Patching and Updates

Apply patches provided by ImageMagick to address the vulnerability.