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Date: Sun Jun 25 11:01:57 2006
From: psz at maths.usyd.edu.au (Paul Szabo)
Subject: hlink.dll: is IE affected?

MSRC says in http://blogs.technet.com/msrc/archive/2006/06/20/437826.aspx :

  this is actually a vulnerability in hlink.dll which is a Windows component

so has much wider exposure than just Excel, as identified also e.g. in

  http://www.auscert.org.au/6421
  http://www.kb.cert.org/vuls/id/394444

I had thought that hlink.dll was an IE component. So I wonder: is IE
affected? A simple test seems to suggest IE refuses to recognize

  <a href="AAA... 4kbytes or over ...AAA">

as a clickable link. Does this mean that the "buffer overflow protection"
was mistakenly built into IE, instead of the library? Could there be
instances where IE calls hlink without a sanity-check?

What other software (besides Office and IE) uses hlink?

Cheers,

Paul Szabo   psz@...hs.usyd.edu.au   http://www.maths.usyd.edu.au/u/psz/
School of Mathematics and Statistics   University of Sydney    Australia

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