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Re: [XHR] XMLHttpRequest specification lacks security considerations

From: Aryeh Gregor <Simetrical+w3c@gmail.com>
Date: Tue, 9 Feb 2010 14:46:52 -0500
Message-ID: <7c2a12e21002091146q5c6caff8u51ec85c7cb2b6a16@mail.gmail.com>
To: Maciej Stachowiak <mjs@apple.com>
Cc: Julian Reschke <julian.reschke@gmx.de>, Anne van Kesteren <annevk@opera.com>, Thomas Roessler <tlr@w3.org>, W3C WebApps WG <public-webapps@w3.org>, public-web-security@w3.org
On Tue, Feb 9, 2010 at 7:13 AM, Maciej Stachowiak <mjs@apple.com> wrote:
> HTTPbis should address this threat in the security considerations section, and should strongly consider making it a MUST-level requirement for servers to check that the Host header is a host they serve. If HTTP had that requirement and all servers followed it, then the risk of DNS rebinding attacks would be eliminated.

Servers don't always know what domains they're expected to serve -- if
I sudo apt-get install lighttpd and already have a domain name
pointing to the server, I expect that domain name to work with no
additional configuration.  And this is how all the web servers I've
used actually work.  So, I imagine this requirement is infeasible.
Received on Tuesday, 9 February 2010 19:47:25 UTC

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