full-disclosure

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From: rst at zaebiz.com (rst)
Subject: IE

The browser version could be checked using Jscript.
<script language="JScript">
alert(navigator.appCodeName+"\n"+navigator.appMinorVersion+"\n"+navigato
r.appName+"\n"+navigator.appVersion+"\n"+navigator.userAgent);
</script>
Run script above and feel happy.
Basically - you can setup the firewall to filter the user-agent like
strings (Not only in headers).

-----Original Message-----
From: full-disclosure-admin@...ts.netsys.com
[mailto:full-disclosure-admin@...ts.netsys.com] On Behalf Of nicolas
vigier
Sent: Monday, July 19, 2004 3:47 PM
To: Ill will
Cc: full-disclosure@...ts.netsys.com
Subject: Re: [Full-Disclosure] IE

On Sun, 18 Jul 2004, Ill will wrote:

> "user-agent contains very little _sensitive_ info"
> 
> user agents could be used for exploits.. like redirecting the browser 
> to whatever exploit page  by the definition of what browser is 
> connecting to it etc.. so it would be a  good idea for some people to 
> conseal what type of browser is defined in the headers

And you can feel safe with that ? Someone can put an exploit on a page
without checking your browser before.
The real solution is to use a browser with no known vulnerability (and
that's better if it didn't have a lot in the past), not to try to hide
what you are using.

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