full-disclosure - Re: [WEB SECURITY] Plain Old Webserver

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Date: Mon, 12 Feb 2007 22:48:37 +0100
From: ascii <ascii@...amail.com>
To: full-disclosure@...ts.grok.org.uk,  websecurity@...appsec.org
Cc: Billy Hoffman <Billy.Hoffman@...dynamics.com>
Subject: Re: [WEB SECURITY] Plain Old Webserver - The
	coolest firefox extension

Billy Hoffman wrote:
> All depends on in the request processing you apply the fix. Its
> possible that URL Decoding hasn't occuried yet, whereby I can bypass
> your filter pretty easily. Not to mention Unicode...

hehehe i was waiting for this : )

remember: this is funsec

the bypass for the filter is in the signature of the same mail

> path = str_replace('../', '', path);
>
> regards,
> Francesco 'ascii' Ongaro
> http://www.ush.it/
>
> ..././..././..././..././
> how can't you love funsec?

cause ..././..././..././..././ becomes ../../../../ since the replace is
applied only once. simple logic trick, no encoding at all

see you,
Francesco 'ascii' Ongaro
http://www.ush.it/

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