bugtraq - MSIE flaws: nested array sort() loop Stack overflow exception

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Message-ID: <000401c4d287$b0deb5e0$0100a8c0@grotedoos>
Date: Thu, 25 Nov 2004 01:41:20 +0100
From: "Berend-Jan Wever" <skylined@...p.tudelft.nl>
To: <full-disclosure@...ts.netsys.com>, <bugtraq@...urityfocus.com>,
   <vuln-dev@...urityfocus.com>
Cc: <secure@...rosoft.com>
Subject: MSIE flaws: nested array sort() loop Stack overflow exception

Hi all,

Another flaw in IE:

<HTML>
  <SCRIPT> a = new Array(); while (1) { (a = new Array(a)).sort(); } </SCRIPT>
  <SCRIPT> a = new Array(); while (1) { (a = new Array(a)).sort(); } </SCRIPT>
</HTML>

Normally I would see if it's exploitable but I figure I'm not MS's pet bug finder/analyser... So, I've CC'ed this message to Microsoft. I'm sure they know their own product better then I do and can analyse the problem much faster. So if you want to know the impact of this vulnerability, ask them: I'm sure they will be more then willing to help you. I'm sure they will even reply to this message with technical details and a patch tomorrow.

Added to the list: http://www.edup.tudelft.nl/~bjwever/advisory_ie_flaws.html

Cheers,
SkyLined
http://www.edup.tudelft.nl/~bjwever

PS. Don't think firefox will keep you save from hackers, I _know_ it won't ;) But more on that later...
PS2. Recursive function call will cause stack overflow causing write exception in guard page on a push, no control over registers.

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