SilverStripe(R) Information Exposure Through Query Strings in GET Request (CWE-598)

["Rustein, Fara Denise \(LATCO - Buenos Aires\)" <frustein@xxxxxxxxxxxx>]

SilverStripe(R) Information Exposure Through Query Strings in GET Request 
(CWE-598)

- CVE: CVE-2013-2653
- CWE: CWE-598
- Deloitte Argentina Advisory Code: DTTAR-20130002

- Vendor Status: CONFIRMED
- Vendor Disclosure Date: May, 8th, 2013.
- Public Disclosure Date: August, 1st, 2013.
- Vendors Affected: SilverStripe - http://www.silverstripe.org/
- Systems Affected: SilverStripe CMS v3.0.3

- Description: It was observed that the SilverStripe CMS application is 
susceptible to information exposure through query strings in forced GET 
requests. The objective for a malicious user would be to send a specially 
crafted URL to a valid user, in an attempt to trick them into clicking this 
malicious link and execute the action in the victim’s context. A malicious user 
may craft a website requesting email and password, where inside an iframe an 
automatic login to the real website could be executed and go by unnoticed.
- PoC:    
http://<IP:Port>/Security/LoginForm?AuthenticationMethod=MemberAuthenticator&Email=<email>&Password=<password>&BackURL=%2Fadmin%2Fpages&action_dologin=Log+in
                NOTE: A single click to the URL above, allows access to the 
admin section of SilverStripe, redirecting the user to 
http://<IP:Port>/admin/pages
- Vulnerability Status: in process of being released.
- Patch Available: 
https://github.com/chillu/silverstripe-framework/commit/3e88c98ca513880e2b43ed7f27ade17fef5d9170
- Fix: Will be available on 3.1 release.

- Related Links: Deloitte Argentina - www.deloitte.com/ar
- Credits: This vulnerability was found by Fara Rustein from Deloitte Argentina 
(https://twitter.com/FaraRustein).
- Feedback: If you have any questions, comments, concerns, updates or 
suggestions please feel free to send them to: frustein@xxxxxxxxxxxx

Fara Rustein
Senior Consultant, Cyber Security - ERS
Deloitte & Co. S.A.
Tte. Gral.J.D.Perón 646 - C1038AAN Buenos Aires Argentina
Main: +54 11 4320 2700 ext. 8350 | Fax: +54 11 4320 4071
frustein@xxxxxxxxxxxx | www.deloitte.com
 Please consider the environment before printing.



 
Deloitte se refiere a una o más de las firmas miembros de Deloitte Touche 
Tohmatsu Limited, una compañía privada del Reino Unido limitada por garantía, y 
su red de firmas miembros, cada una como una entidad única e independiente y 
legalmente separada. Una descripción detallada de la estructura legal de 
Deloitte Touche Tohmatsu Limited y sus firmas miembros puede verse en el sitio 
web http://www.deloitte.com/about.                           La información de 
este mail es confidencial y concierne únicamente a la persona a quien está 
dirigida. Si este mensaje no está dirigido a usted, por favor tenga presente 
que no tiene autorización para leer el resto de este e-mail, copiarlo o 
derivarlo a cualquier otra persona que no sea aquella a quien está dirigido. Si 
recibe este mail por error, por favor, avise al remitente, luego de lo cual 
rogamos a usted destruya el mensaje original. No se puede responsabilizar de 
ningún modo a Deloitte & Co. S.A. ni a sus subsidiarias por cualquier 
consecuencia o daño que pueda resultar del apropiado y completo envío y 
recepción del contenido de este e-mail.
 
Deloitte refers to one or more of Deloitte Touche Tohmatsu Limited, a UK 
private company limited by guarantee, and its network of member firms, each of 
which is a legally separate and independent entity. Please see 
http://www.deloitte.com/about for a detailed description of the legal structure 
of Deloitte Touche Tohmatsu Limited and its member firms. 
The information in this e-mail is confidential and intended solely for the 
person to whom it is addressed. If this message is not addressed to you, please 
be aware that you have no authorization to read the rest of this e-mail, to 
copy it or to furnish it to any person other than the addressee. Should you 
have received this e-mail by mistake, please bring this to the attention of the 
sender, after which you are kindly requested to destroy the original message. 
Deloitte & Co. S.A. and subsidiaries cannot be held responsible or liable in 
any way whatsoever for and/or in connection with any consequences and/or damage 
resulting from the proper and complete dispatch and receipt of the content of 
this e-mail.