[Fwd: pWins Perl Web Server Directory Transversal Vulnerability]

--------------070206090007060602060307
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit

  Speaking of Perl Web Server vulnerabilities....

-------- Original Message --------
Subject: pWins Perl Web Server Directory Transversal Vulnerability
Date: Wed, 27 Nov 2002 16:49:19 -0700
From: Matthew Wagenknecht <[email protected]>
To: [email protected], [email protected], [email protected]



>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







_________________________________________________________________
The new MSN 8: smart spam protection and 2 months FREE*  
http://join.msn.com/?page=features/junkmail





--------------070206090007060602060307--