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Re: [websec] #21: sniffing of text/html shouldn't override polyglot label of application/xhtml+xml

Philip Gladstone <pgladsto@cisco.com> Mon, 24 October 2011 16:23 UTC

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Date: Mon, 24 Oct 2011 12:23:34 -0400
From: Philip Gladstone <pgladsto@cisco.com>
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Subject: Re: [websec] #21: sniffing of text/html shouldn't override polyglot label of application/xhtml+xml
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On 10/23/2011 7:52 PM, websec issue tracker wrote:
>
>   (One still might want to sniff text/html when the type is labeled
>   text/plain, for example, but not for other polyglot cases.)
This would be a disaster. For security reasons, a web server needs to 
know when a document will be "executed" rather than "displayed". 
Currently, using text/plain will display any document literally. Causing 
a document that looks like html to be executed will open lots of web 
sites to XSS.

Philip

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