CVE-2024-55456
📋 TL;DR
CVE-2024-55456 is a segmentation violation vulnerability in lunasvg's gray_find_cell component that can cause denial of service or potentially allow arbitrary code execution. This affects applications using lunasvg v3.0.1 for SVG processing. Developers and systems processing untrusted SVG files are at risk.
💻 Affected Systems
- lunasvg
📦 What is this software?
Lunasvg by Sammycage
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise if the segmentation violation can be weaponized into memory corruption exploits.
Likely Case
Application crash or denial of service when processing malicious SVG files, disrupting SVG rendering functionality.
If Mitigated
Limited impact with proper input validation and sandboxing, potentially just failed SVG processing.
🎯 Exploit Status
Segmentation violations can potentially lead to memory corruption exploits, but weaponization requires specific memory layout conditions. The GitHub issue shows the crash but not weaponized exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v3.0.2 or later
Vendor Advisory: https://github.com/sammycage/lunasvg/issues/199
Restart Required: Yes
Instructions:
1. Update lunasvg to v3.0.2 or later via package manager or manual installation. 2. Rebuild any applications using lunasvg. 3. Restart affected services or applications.
🔧 Temporary Workarounds
Disable SVG processing
allTemporarily disable SVG file processing in applications using lunasvg
Input validation for SVG files
allImplement strict validation and sanitization of SVG files before processing
🧯 If You Can't Patch
- Implement strict input validation and sanitization for all SVG files
- Run lunasvg in sandboxed environments with limited privileges
🔍 How to Verify
Check if Vulnerable:
Check if lunasvg version is 3.0.1. For applications using lunasvg, verify the linked library version.Check Version:
lunasvg --version or check package manager (apt list lunasvg, yum list lunasvg, etc.)Verify Fix Applied:
Confirm lunasvg version is 3.0.2 or later. Test SVG processing functionality works without crashes.📡 Detection & Monitoring
Log Indicators:
- Segmentation fault errors in application logs
- Unexpected application crashes during SVG processing
- Error messages mentioning gray_find_cell or lunasvg
Network Indicators:
- Unusual SVG file uploads to web applications
- Multiple failed SVG processing requests
SIEM Query:
source="application.logs" AND ("segmentation fault" OR "lunasvg" OR "gray_find_cell")