Hold up a second folks, you're telling this list now that ASP.NET will decompose various character sets like those containing your full-width single quote, into it's ASCII equivalent. Brian I think you should've stuck to your original story because I'm almost certain this is completely untrue.
If it were true then we'd have some dire state of emergency on our hands no? Compatibility decomposition and canonical composition are a function of the Unicode normalization forms in use (http://unicode.org/reports/tr15/). *In particular, forms KD and KC would do what you're saying, but those aren't commonly in use afaik. Developers should be very cautious when normalizing to these forms. If you've managed to find some specific ASP.NET classes which normalize to problematic forms KD/KC then you should let us know, but just saying all of ASP.NET does this would be a huge stretch. The framework supports all four normalization methods (http://msdn2.microsoft.com/en-us/winfx/system.string.aspx) and it's up to developers to implement the ones they need. ---------- Original Message ----------- From: ascii <[EMAIL PROTECTED]> To: Brian Eaton <[EMAIL PROTECTED]> Cc: Web Security <[EMAIL PROTECTED]>, Full-Disclosure <[email protected]> Sent: Mon, 21 May 2007 23:01:26 +0200 Subject: [WEB SECURITY] Re: [Full-disclosure] noise about full-width encoding bypass? > Brian Eaton wrote: > > To summarize what I've heard from various sources: I am missing > > something important. =) Both PHP and ASP.NET will decode these > > characters into their ASCII equivalents. > > (AFAIK) > > Only ASP.NET/IIS decodes that automatically. > > PHP *can* do that as like JSP and probably others but that has > to happen explicitly in the application code or on an other layer. > > Regards, > Francesco `ascii` Ongaro > http://www.ush.it/ > > ---------------------------------------------------------------------------- > Join us on IRC: irc.freenode.net #webappsec > > Have a question? Search The Web Security Mailing List Archives: > http://www.webappsec.org/lists/websecurity/ > > Subscribe via RSS: > http://www.webappsec.org/rss/websecurity.rss [RSS Feed] ------- End of Original Message ------- _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
