ZeroBox Vulnerability Database

Title:
======
Microsoft SharePoint 2013 (Cloud) – Persistent Exception Handling Web Vulnerability

Date:
=====
2013-09-11

References:
===========
http://www.vulnerability-lab.com/get_content.php?id=812

Security Bulletin: MS13-067
http://technet.microsoft.com/de-de/security/bulletin/MS13-067

Microsoft Security Response Center (MSRC) ID: 14096

VL-ID:
=====
812

Common Vulnerability Scoring System:
====================================
5.7

Introduction:
=============
Microsoft SharePoint is a Web application platform developed by Microsoft. First launched in 2001, SharePoint has historically been
associated with intranet content management and document management, but recent versions have significantly broader capabilities.
Microsoft has two versions of SharePoint available at no cost, but it sells premium editions with additional functionality, and
provides a cloud service edition as part of their Office 365 platform (previously BPOS). The product is also sold through a cloud
model by many third-party vendors.

SharePoint comprises a multipurpose set of Web technologies backed by a common technical infrastructure. By default, SharePoint has a
Microsoft Office-like interface, and it is closely integrated with the Office suite. The web tools are designed to be usable by non-
technical users. SharePoint can be used to provide intranet portals, document & file management, collaboration, social networks, extranets,
websites, enterprise search, and business intelligence. It also has system integration, process integration, and workflow automation capabilities.

Enterprise application software (e.g. ERP or CRM packages) often provide some SharePoint integration capability, and SharePoint also
incorporates a complete development stack based on web technologies and standards-based APIs. As an application platform, SharePoint provides
central management, governance, and security controls for implementation of these requirements. The SharePoint platform integrates directly
into IIS – enabling bulk management, scaling, and provisioning of servers, as is often required by large organizations or cloud hosting providers.
In 2008, the Gartner Group put SharePoint in the`leaders` quadrant in three of its Magic Quadrants (for search, portals, and enterprise content
management). SharePoint is used by 78% of Fortune 500 companies[citation needed]. Between 2006 to 2011, Microsoft sold over 36.5 million user
licenses[citation needed].

(Copy of the Homepage: http://en.wikipedia.org/wiki/Microsoft_SharePoint )

Abstract:
=========
The Vulnerability Laboratory Research Team discovered a persistent web vulnerability in the official Microsoft Sharepoint Online (cloud-based) application.

Report-Timeline:
================
2013-02-01: Researcher Notification & Coordination (Benjamin Kunz Mejri)
2013-02-06: Vendor Notification (Microsoft Security Response Center – MSRC)
2013-02-07: Vendor Response/Feedback (Microsoft Security Response Center – MSRC)
2013-09-11: Vendor Fix/Patch (Microsoft Security Bulletin)
2013-09-11: Public Disclosure (Vulnerability Laboratory)

Status:
========
Published

Affected Products:
==================
Microsoft Corp.
Product: Sharepoint Online (Cloud-Based)

Exploitation-Technique:
=======================
Remote

Severity:
=========
High

Details:
========
A persistent input validation vulnerability is detected in the official Microsoft Sharepoint 2013 Online (cloud-based) web-application.
The vulnerability allows remote attackers to inject own malicious script code to a vulnerable module on application-side (persistent).

The vulnerability is located in the `Sharepoint Online Cloud 2013 Service` section when processing to request the `Berechtigungen für
den Metadatenspeicher festlegen` module with manipulated ms-descriptionText > ctl00_PlaceHolderDialogBodySection_
PlaceHolderDialogBodyMainSection_ValSummary parameters. The persistent injected script code execution occurs in the main
`invalid BDC Übereinstimmung` web application exception-handling.

The vulnerability can be exploited with a low (restricted) privileged application user account and low or medium required user interaction.
Successful exploitation of the vulnerability result in persistent session hijacking, persistent phishing, stable external redirect, stable
external malware loads and persistent vulnerable module context manipulation.

Vulnerable Service(s):
[+] Microsoft – Sharepoint Online (cloud-based)

Vulnerable Module(s):
[+] Berechtigungen für den Metadatenspeicher festlegen – BDC Metadatenspeicher zuweisen

Vulnerable Parameter(s):
[+] ms-descriptionText > ctl00_PlaceHolderDialogBodySection_PlaceHolderDialogBodyMainSection_ValSummary
[+] TA_ManageBDCPermissions_data

Affected Module(s):
[+] BDC Übereinstimmung > Exception Handling

Proof of Concept:
=================
The persistent input validation web vulnerability can be exploited by remote attackers with low required user interaction and low privileged
sharepoint cloud application user account. For demonstration or reproduce …

Review: Berechtigungen für den Metadatenspeicher festlegen – Summery > BDC Übereinstimmung > Exception (TA_ManageBDCPermissions_data)