full-disclosure - Re: Internet Explorer 0day exploit

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Message-ID: <Pine.LNX.4.62.0707101052310.4147@linuxbox.org>
Date: Tue, 10 Jul 2007 10:53:21 -0500 (CDT)
From: Gadi Evron <ge@...uxbox.org>
To: Thor Larholm <seclists@...holm.com>
Cc: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com
Subject: Re: Internet Explorer 0day exploit

On Tue, 10 Jul 2007, Thor Larholm wrote:
> There is a URL protocol handler command injection vulnerability in Internet

Thor, thank you for sharing. Nice work.

To paraphrase Guninski, this is still not a 0day. It is a vulnerability 
being disclosed.


> Explorer for Windows that allows you to execute shell commands with arbitrary 
> arguments. This vulnerability can be triggered without user interaction 
> simply by visiting a webpage.
>
> When Internet Explorer encounters a reference to content inside a registered 
> URL protocol handler scheme it calls ShellExecute with the EXE image path and 
> passes the entire request URI without any input validation. For the sake of 
> demonstration I have constructed an exploit that bounces through Firefox via 
> the FirefoxURL protocol handler. The full advisory and a working Proof of 
> Concept exploit can be found at
>
> http://larholm.com/2007/07/10/internet-explorer-0day-exploit/
>
> Cheers
> Thor Larholm
>

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