CVE-2025-62594
📋 TL;DR
ImageMagick versions before 7.1.2-8 contain a vulnerability in the CLAHEImage function where zero tile dimensions cause unsigned integer underflow and division-by-zero errors. This leads to out-of-bounds memory access and immediate crashes, resulting in denial-of-service. Any system using vulnerable ImageMagick versions to process untrusted images is affected.
💻 Affected Systems
- ImageMagick
📦 What is this software?
Imagemagick by Imagemagick
⚠️ Risk & Real-World Impact
Worst Case
Complete service disruption through repeated crashes when processing malicious images, potentially affecting availability of image processing services.
Likely Case
Intermittent crashes when processing specially crafted images, causing service interruptions and requiring restarts.
If Mitigated
Minimal impact with proper input validation and sandboxing of image processing operations.
🎯 Exploit Status
Exploitation requires crafting malicious images with zero tile dimensions to trigger the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 7.1.2-8
Vendor Advisory: https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-wpp4-vqfq-v4hp
Restart Required: No
Instructions:
1. Update ImageMagick to version 7.1.2-8 or later. 2. For package managers: 'sudo apt update && sudo apt upgrade imagemagick' (Debian/Ubuntu) or 'sudo yum update imagemagick' (RHEL/CentOS). 3. For source builds: Download latest from https://imagemagick.org and recompile.
🔧 Temporary Workarounds
Input Validation
allImplement server-side validation to reject images with suspicious dimensions before processing with ImageMagick.
🧯 If You Can't Patch
- Implement strict input validation to filter out images with zero dimensions before ImageMagick processing.
- Sandbox ImageMagick processes with resource limits and isolation to contain crashes.
🔍 How to Verify
Check if Vulnerable:
Run 'convert --version' or 'magick --version' and check if version is below 7.1.2-8.Check Version:
convert --version | head -1Verify Fix Applied:
After update, verify version is 7.1.2-8 or higher using 'convert --version'.📡 Detection & Monitoring
Log Indicators:
- ImageMagick process crashes
- Segmentation fault errors in application logs
- Failed image processing operations
Network Indicators:
- Unusual volume of image uploads to vulnerable endpoints
SIEM Query:
source="*imagemagick*" AND ("segmentation fault" OR "crash" OR "SIGSEGV")