- From: Bruce Miller <bruce.miller@nist.gov>
- Date: Wed, 02 Apr 2008 12:31:59 -0400
- To: Henri Sivonen <hsivonen@iki.fi>
- Cc: Simon Pieters <simonp@opera.com>, Ian Hickson <ian@hixie.ch>, Sam Ruby <rubys@us.ibm.com>, Neil Soiffer <Neils@dessci.com>, public-html@w3.org, www-math@w3.org
Henri Sivonen wrote: > > On Apr 2, 2008, at 19:13, Bruce Miller wrote: >> >> Henri Sivonen wrote: >>> On Apr 2, 2008, at 18:58, Bruce Miller wrote: >>>> I'm trying, but I don't get it. >>>> I guess you're saying that with something like: >>>> <script/> >>>> do_dangerous_stuff(); >>>> </script> >>> Gatekeeper applying the rule "/> always closes" would determine that >>> do_dangerous_stuff(); is not executable but existing browsers would >>> still run it. Of course, this is the wrong way to write a gatekeeper. >>> The right way is *never* to pass through original source but to >>> always run a parser, followed by sanitizer, followed by serializer. >>> However, we can't expect people who write gatekeepers to be competent. >> >> Hmm.... >> Can </script> put do_dangerous_stuff(); into a (new) <script> >> so that "everybody" agrees it's executable? > > Not without creating a gatekeeper problem. What problem? They'll treat dangerous stuff as executable whether they follow the old rules, or the new rules, wont they? >> What do current browsers do with: >> <script/> >> do_dangerous_stuff(); >> <body>.... >> ? > > > The <body> tag becomes part of the script but the script doesn't run, > because EOF is hit before a </script>. (Tried Firefox 3b4, Safari 3.1 > and Opera 9.5 beta.) I'm tempted to say, "That's a good result" since the dangerous stuff is not actually executed according to either old or new rules.... But I suspect you won't be convinced by that... :> (and I can almost understand why...) > http://software.hixie.ch/utilities/js/live-dom-viewer/?%3C!DOCTYPE%20html%3E%0A%3Cscript%2F%3E%0A%20w(%22Dangerous%22)%3B%0A%3Cbody%3E... > > -- bruce.miller@nist.gov http://math.nist.gov/~BMiller/
Received on Wednesday, 2 April 2008 16:33:12 UTC