CVE-2025-11275
📋 TL;DR
A heap-based buffer overflow vulnerability exists in Assimp 6.0.2's ODDLParser::getNextSeparator function. This allows local attackers to potentially execute arbitrary code or crash applications using the library. The vulnerability affects any software that uses Assimp to process OpenDDL files.
💻 Affected Systems
- Open Asset Import Library (Assimp)
📦 What is this software?
Assimp by Assimp
⚠️ Risk & Real-World Impact
Worst Case
Local privilege escalation leading to full system compromise via arbitrary code execution.
Likely Case
Application crash (denial of service) when processing malicious OpenDDL files.
If Mitigated
Limited impact if proper sandboxing and privilege separation are implemented.
🎯 Exploit Status
Proof-of-concept exploit is publicly available in the GitHub issue. Attack requires local access and processing of malicious OpenDDL files.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check latest Assimp release (6.0.3 or newer likely contains fix)
Vendor Advisory: https://github.com/assimp/assimp/issues/6357
Restart Required: Yes
Instructions:
1. Check current Assimp version
2. Update to latest Assimp release via package manager or source
3. Recompile any applications using Assimp
4. Restart affected services
🔧 Temporary Workarounds
Disable OpenDDL file processing
allConfigure applications to reject or skip OpenDDL file formats
Application-specific configuration required
Input validation for OpenDDL files
allImplement strict validation of OpenDDL files before passing to Assimp
Custom code implementation required
🧯 If You Can't Patch
- Implement strict file upload restrictions for OpenDDL files
- Run Assimp-dependent applications with minimal privileges and in sandboxed environments
🔍 How to Verify
Check if Vulnerable:
Check if Assimp version is 6.0.2 or vulnerable version. Test with provided PoC file.Check Version:
assimp version (if CLI installed) or check library version in applicationVerify Fix Applied:
Update to latest Assimp version and test with PoC file - should not crash.📡 Detection & Monitoring
Log Indicators:
- Application crashes when processing OpenDDL files
- Memory access violation errors in logs
Network Indicators:
- Local file processing activity (not network exploitable)
SIEM Query:
Application:assimp AND (EventID:1000 OR "access violation" OR "buffer overflow")