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Re: IE UXSS (Universal XSS in IE, was Re: Microsoft Internet Information Services UTF-7 XSS Vulnerability [MS06-053])
From: "Brian Eaton" <eaton.lists () gmail com>
Date: Mon, 2 Oct 2006 14:27:13 -0400

On 10/2/06, Paul Schmehl <pauls () utdallas edu> wrote:
--On October 2, 2006 9:44:27 AM -0400 Brian Eaton <eaton.lists () gmail com>
wrote:

I'm guessing that you tested a server wth some kind of customized 404
response that neglected to include a charset specification.  That's
not a vulnerability in Apache, that is poor site configuration.

Brian, a question for clarification.  When you say "customized 404
response", you are not referring to a customized error document (as
described briefly in the httpd.conf file) but rather to having changed the
headers that the server returns when queried with a GET request, correct?
And wouldn't this require changing source code and compiling a custom
build of apache?

I am referring to the customized error documents described in the
httpd.conf file.  No recompiling required.

The default Apache response for 404s includes a content-type header
specifying the iso-8859-1 charset.  If you set up an ErrorDocument
handler, though, Apache assumes you know what you are doing and does
not include a charset specification in the content-type header.  You
need to do it yourself.  Including a meta http-equiv tag in the HTML
seems like an obvious fix, but there are other ways as well.

Regards,
Brian

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