by r0t,der4444,cembo,VietMafia

Friday, December 30, 2005

OoApp Guestbook XSS vuln.

OoApp Guestbook XSS vuln.

Vuln. discovered by : r0t
Date: 30 dec. 2005
vendor:http://www.ooapp.com/
affected version:2.1 and prior

Product Description:

This is a free php based guestbook for your web site. Easy to setup, no MySQL necessary. Uses a basic flat file. Includes managment area, and general area where users can sign the guestbook. This version corrects a problem that came up when someone did not enter their email address into the guestbook.

Vuln. Description:

OoApp Guestbook contains a flaw that allows a remote cross site scripting attack. This flaw exists because input passed to "page" paremter in "home.php" isn't properly sanitised before being returned to the user.
This could allow a user to create a specially crafted URL that would execute arbitrary code in a user's browser within the trust relationship between the browser and the server, leading to a loss of integrity.

poc:


/home.php?page=1[XSS]
or
/home.php?do=add_form&page=1[XSS]


Solution:
Edit the source code to ensure that input is properly sanitised.

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