full-disclosure - Re: A technique to mitigate cookie-stealing XSS attacks

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Message-ID: <Pine.LNX.4.21.0211100416120.21326-100000@Tempo.Update.UU.SE>
From: ulfh at update.uu.se (Ulf Harnhammar)
Subject: Re: A technique to mitigate cookie-stealing XSS attacks

On Thu, 7 Nov 2002, Justin King wrote:

> I would be very interested in major browsers supporting a <dead> tag with an
> optional parameter to be a hash of the data between the opening and closing
> dead tag. This tag would indicate that no "live" elements of HTML be
> supported (e.g., JavaScript, VBScript, embed, object).

I'm not sure if that's the best solution. Lots of code out there do much
less filtering than it should, so there will probably be a way to include
a </dead> tag and then use all the usual XSS tricks.

// Ulf Harnhammar
   VSU Security
   ulfh@...ate.uu.se