Bugtraq mailing list archives
Re: Object tag crashes Internet Explorer 4.0
From: paulle () MICROSOFT COM (Paul Leach)
Date: Tue, 4 Aug 1998 14:42:41 -0700
I meant the variant of HTML that includes object tags and J-Script/VB-Script that has conditional statements and recursion -- which is enough to make it Turing complete. If the precise name of that is DHTML, it's not relevant -- as far as users are concerened it's stuff in web pages that nearly all browsers know how to and will execute and will throw it into a non-terminating computation -- which makes it "HTML" as far as they are concerned.
-----Original Message----- From: kragen () pobox com [mailto:kragen () pobox com] Sent: Tuesday, August 04, 1998 2:37 PM To: Paul Leach Cc: BUGTRAQ () netspace org Subject: Re: Object tag crashes Internet Explorer 4.0 On Tue, 4 Aug 1998, Paul Leach wrote:The possibility of infinite loops and infinite recursion inHTML has beendiscussed on the lists before. Trying to detect and preventthem is aninstance of the "Turing machine halting" problem, and it iswell known amongcomputer scientists to be impossible.Certainly not. HTML is not Turing-complete. In fact, detecting and preventing infinite loops and recursion in HTML simply requires traversing a directed acyclic graph and determining that it is, in fact, acyclic. This is simple. Perhaps you're thinking of DHTML. Or perhaps you're thinking of some kind of evil, twisted web server that serves up the same page under an infinite number of different names, each modified to include a frame reference to that page under a different name. Kragen
Current thread:
- Re: Object tag crashes Internet Explorer 4.0, (continued)
- Re: Object tag crashes Internet Explorer 4.0 Pavel Kankovsky (Aug 05)
- Re: Object tag crashes Internet Explorer 4.0 David Damerell (Aug 06)
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- Re: Object tag crashes Internet Explorer 4.0 Alan Cox (Aug 07)
- Description of the Eudora Security Hole Aleph One (Aug 07)
- resend Steve Bellovin (Aug 06)
- Re: resend Casper Dik (Aug 07)
- Re: Object tag crashes Internet Explorer 4.0 Paul Leach (Aug 04)
- Re: Object tag crashes Internet Explorer 4.0 Joe (Aug 05)
- Re: Object tag crashes Internet Explorer 4.0 Paul Leach (Aug 06)
- Re: Object tag crashes Internet Explorer 4.0 Roger Espel Llima (Aug 06)
- Re: Object tag crashes Internet Explorer 4.0 Paul Leach (Aug 06)
- Re: Object tag crashes Internet Explorer 4.0 Paul Leach (Aug 06)
- Re: Object tag crashes Internet Explorer 4.0 Paul Leach (Aug 06)
- Re: Object tag crashes Internet Explorer 4.0 Florian Weimer (Aug 08)