SAP Cfolders Multiple Stored XSS Vulnerabilies

Digital Security Research Group [DSecRG] Advisory #DSECRG-09-014

Original advisory: http://dsecrg.com/pages/vul/show.php?id=114

Application: SAP Cfolders (included in: SAP SRM, SAP ECC, SAP Knowledge Management and SAP NetWeaver
cRooms)
Vendor URL: http://SAP.com
Bugs: Multiple Stored XSS
Risk: Hight
Exploits: YES
Reported: 04.12.2008
Vendor response: 05.12.2008
Vulnerability patched: 15.12.2008
Date of Public Advisory: 21.04.2009
Reference: SAP note 1284360
Author: Digital Security Research Group [DSecRG] (research [at] dsec [dot] ru)

Description

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cFolders (Collaboration Folders) is the SAP web-based application for collaborative sharing of information.
cFolders is part of a suite of applications powered by SAP NetWeaver that integrate project management,
knowledge management and resource management in collaborative inter-enterprise and intra-enterprise
environments.

cFolders is integrated to SAP ECC, SAP Product Lifecycle
Management (PLM), SAP Supplier Relationship Management (SRM), SAP Knowledge Management and SAP
NetWeaver cRooms (collaboration rooms). Virtual teams can access, view online, subscribe for changes, and
redline documents and product information. Partners and suppliers can interact with cFolders in predefined
collaborative or competitive scenarios.

Details

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Multiple Stored XSS vulnerabilities found in SAP Cfolders engine. User which is a business partner of
organization can steal Administrators cookie by inserting javascript into CFolders system.
He can do this using 2 Stored XSS vulnerabilities.

SAP Server dont associate session identificators with users IP adress or with any other additional data.
IT autentificate users Only by cookies. So any user which can steal administrators cookie can use them to authentificate
with administrator rights.

1. User can insert javascript code into site using link creation option

He can inject javascript code into LINK field on page

https://[site]/sap/bc/bsp/sap/cfx_rfc_ui/hyp_de_create.htm

example LINK value:

http://test.com" onmouseover="alert(document.cookie)">

Then when administrator will browse for user folders script will execute.

2. Second XSS vulnerability found in document uploading area.
   User can create a document with file name included javascript code.

example filename value:

aaaa"><script>alert()</script>.doc

To do this user must change file name in http request when sending a request for file uploading.

So using this vulnerability user can steal cookie like he do in first example.

Fix Information

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The issue has been solved. See SAP note 1284360.

References:

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SAP note 1284360

https://service.sap.com/sap/support/notes/1284360

About

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Digital Security is leading IT security company in Russia, providing information security consulting, audit and
penetration testing services, risk analysis and ISMS-related services and certification for ISO/IEC 27001:2005 and PCI DSS
standards. Digital Security Research Group focuses on web application and database security problems with vulnerability
reports, advisories and whitepapers posted regularly on our website.

Contact: research [at] dsecrg [dot] com
http://www.dsecrg.com
http://www.dsec.ru