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vulnerlabVulnerability Research Laboratory - Benjamin Kunz Mejri (Rem0ve)VULNERLAB:47
HistorySep 17, 2011 - 12:00 a.m.

Drupal CMS v7.5.x - Multiple Web Vulnerabilities

Vulnerability Research Laboratory - Benjamin Kunz Mejri (Rem0ve)
Document Title:
Drupal CMS v7.5.x - Multiple Web Vulnerabilities

References (Source):
Released on the german ePost Security Cup (

Release Date:

Vulnerability Laboratory ID (VL-ID):

Product & Service Introduction:
Drupal is a free software package that allows an individual or a community of users to easily publish, manage and 
organize a wide variety of content on a website. Tens of thousands of people and organizations are using Drupal to 
power scores of different web sites, including

    * Community web portals
    * Discussion sites
    * Corporate web sites
    * Intranet applications
    * Personal web sites or blogs
    * Aficionado sites
    * E-commerce applications
    * Resource directories
    * Social Networking sites

The built-in functionality, combined with dozens of freely available add-on modules, will enable features such as:

    * Electronic commerce
    * Blogs
    * Collaborative authoring environments
    * Forums
    * Peer-to-peer networking
    * Newsletters
    * Podcasting
    * Picture galleries
    * File uploads and downloads   ... & more!

(Copy of the Vendor Homepage:

Abstract Advisory Information:
Vulnerability-Lab team discovered multiple web vulnerabilities on the famous Drupal Content Management System.

Vulnerability Disclosure Timeline:
2011-02-07:	Vendor Notification
2011-04-09:	Vendor Response/Feedback
2011-07-01:	Vendor Fix/Patch
2011-09-18:	Public or Non-Public Disclosure

Discovery Status:

Exploitation Technique:

Severity Level:

Technical Details & Description:
Multiple persistent input validation errors are detected on the new Drupal CMS v7.x.
Local privileged user accounts can implement malicous persistent script codes to manipulate application content.

Vulnerable Module(s): (Persistent)
								[+] Configure
								[+] Permission
								[+] Roles
								[+] Rules

Multiple non-persistent input validation errors are detected on the new Drupal CMS v7.x.
Remote attackers can hijack customer session with high required user inter action via cross site scripting as non-persistent request.

Vulnerable Module(s): (Non-Persistent)
								[+] ?q
								[+] &destination

Pictures: (All)

Proof of Concept (PoC):
Input Validation Vulnerability (Persistent) 1.1          		|>access|>rulez

1.1 |> later affected files   		|>Roles|>Display    		|>Add block|>Show Block specific roles

Input Validation Vulnerability (Non-Persistent)[IVV]&destination=admin%2Fuser%2Frules%2Fadd

Security Risk:
The security risk of the persistent vulnerabilities are estimated as medium.
the security risk of the non-persistent cross site vulnerabilities are estimated as low.

Credits & Authors:
Vulnerability Research Laboratory - Benjamin Kunz Mejri (Rem0ve)

Disclaimer & Information:
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either expressed or implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability-
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may not apply. We do not approve or encourage anybody to break any vendor licenses, policies, deface websites, hack into databases 
or trade with fraud/stolen material.

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