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List:       bugtraq
Subject:    pWins Perl Web Server Directory Transversal Vulnerability
From:       "Matthew Wagenknecht" <mattwagenknecht () hotmail ! com>
Date:       2002-11-27 23:49:19
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From www.sourceforge.net/projects/pwins: "pWins is a webserver-software 
based on perl and ruby (not yet) code. My aim is to make it fast, small and 
secure, supporting cgi (perl, ruby) and php scripts. It's easy to install 
and configurate!"

versions: 0.2.5 and earlier, tested on Windows only..

description:
pWins allows directory transversal via unicode characters (%255, you know, 
nimda stuff).. If it's installed on the c drive, you can get to any file 
(ahem.. sam._) easily.. for example, 
http://SomeWebServer/../../windows/repair/sam._

no exploit provided because too trivial..

fix:
author has posted a patch in the Bugs section on sourceforge.net, but I've 
found that it breaks script processing because he forgot to escape the 
special characters (%)in his regular expressions.. line 247 of cgipl.pm (i 
think) search for url_check

or wait for version 0.2.8 due to be out soon..

Matt Wagenknecht
Security Administrator







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