CVE-2025-2152
📋 TL;DR
A critical heap-based buffer overflow vulnerability in Assimp's BaseImporter::ConvertToUTF8 function allows remote attackers to execute arbitrary code or crash applications. This affects any software using Assimp 5.4.3 to process untrusted 3D model files. The vulnerability is remotely exploitable without authentication.
💻 Affected Systems
- Open Asset Import Library (Assimp)
📦 What is this software?
Assimp by Assimp
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or ransomware deployment.
Likely Case
Application crashes (denial of service) or limited code execution within the application context.
If Mitigated
Contained impact with proper sandboxing, minimal privileges, and input validation.
🎯 Exploit Status
Exploit details are publicly disclosed in GitHub issues, making weaponization probable.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check latest Assimp release (likely 5.4.4 or later)
Vendor Advisory: https://github.com/assimp/assimp/issues/6027
Restart Required: Yes
Instructions:
1. Check Assimp version with 'assimp version' or library headers.
2. Update Assimp via package manager (apt, yum, brew) or compile from source.
3. Rebuild and redeploy any applications using Assimp.
4. Restart affected services.
🔧 Temporary Workarounds
Input Validation
allReject or sanitize untrusted 3D model files before passing to Assimp.
Sandboxing
linuxRun Assimp in isolated containers or with minimal privileges.
docker run --read-only --cap-drop=ALL assimp-processor
🧯 If You Can't Patch
- Implement strict network controls to block untrusted file uploads.
- Use application allowlisting to prevent unauthorized code execution.
🔍 How to Verify
Check if Vulnerable:
Check if Assimp version is 5.4.3 via 'assimp version' command or library version in code.Check Version:
assimp versionVerify Fix Applied:
Confirm Assimp version is updated beyond 5.4.3 and test with known malicious 3D files.📡 Detection & Monitoring
Log Indicators:
- Application crashes with memory access violations
- Unusual process spawning from Assimp-related binaries
Network Indicators:
- Unexpected uploads of 3D model files to vulnerable endpoints
SIEM Query:
source="application.log" AND ("assimp" OR "BaseImporter") AND ("segmentation fault" OR "access violation")