CVE-2025-2754
📋 TL;DR
A critical heap-based buffer overflow vulnerability in Assimp's AC3D file handler allows remote attackers to execute arbitrary code or crash applications by providing specially crafted AC3D files. This affects any software using Assimp 5.4.3 to process AC3D files, potentially enabling remote code execution.
💻 Affected Systems
- Open Asset Import Library (Assimp)
📦 What is this software?
Assimp by Assimp
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with the privileges of the application using Assimp, potentially leading to full system compromise.
Likely Case
Application crash (denial of service) or limited code execution depending on exploit sophistication and mitigations like ASLR.
If Mitigated
Application crash with no code execution if modern exploit mitigations are effective.
🎯 Exploit Status
Exploit disclosed publicly; remote attack vector with crafted files makes weaponization probable.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check latest Assimp release or GitHub issues for fix
Vendor Advisory: https://github.com/assimp/assimp/issues/6015
Restart Required: Yes
Instructions:
1. Monitor Assimp GitHub for official patch release.
2. Update Assimp to patched version.
3. Rebuild and redeploy any applications using Assimp.
🔧 Temporary Workarounds
Disable AC3D file processing
allRemove or disable the AC3D file handler in Assimp configuration to prevent exploitation.
Modify Assimp configuration to exclude AC3D importer; exact method depends on application integration.
Input validation for AC3D files
allImplement strict validation or sandboxing for AC3D file inputs before passing to Assimp.
Implement file type verification and size limits in application code.
🧯 If You Can't Patch
- Isolate systems using Assimp behind firewalls and restrict network access.
- Implement application allowlisting and monitor for crashes or unusual behavior.
🔍 How to Verify
Check if Vulnerable:
Check Assimp version; if using 5.4.3 and AC3D processing is enabled, assume vulnerable.Check Version:
assimp version (if CLI installed) or check library version in application build.Verify Fix Applied:
Update to patched version and test with known malicious AC3D files to ensure no crash or exploit.📡 Detection & Monitoring
Log Indicators:
- Application crashes or errors related to Assimp AC3D processing
- Unexpected file processing from untrusted sources
Network Indicators:
- Inbound transfers of AC3D files to vulnerable services
SIEM Query:
Search for 'assimp' or 'AC3D' in application logs with error or crash events.