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Vulnerability Alert

Microsoft SharePoint Cross-Site Scripting Vulnerability

 
Threat Type:CWE-79: Cross-Site Scripting (XSS)
IntelliShield ID:28469
Version:1
First Published:2013 March 12 17:12 GMT
Last Published:2013 March 12 17:12 GMT
Port: Not available
CVE:CVE-2013-0083
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Mild Damage
CVSS Base:4.3 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:3.2
Related Resources:
View related IPS SignatureView related Applied Mitigation BulletinView related Event Response
 
 
Version Summary:Microsoft SharePoint Server contains a vulnerability that could allow an unauthenticated, remote attacker to conduct cross-site scripting attacks. Updates are available.
 
 
Description
Microsoft SharePoint Server contains a vulnerability that could allow an unauthenticated, remote attacker to conduct cross-site scripting attacks.

The vulnerability is due to insufficient validation of user-supplied input. An unauthenticated, remote attacker could exploit this vulnerability to execute SharePoint commands in the security context of an affected site. Successful exploitation could allow an attacker to gain elevated privileges which could be leveraged to conduct further attacks, such as stealing sensitive browser-based information, including authentication cookies or recently submitted data, or to take actions on the site as the affected user.

Microsoft has confirmed the vulnerability in a security bulletin and released software updates.
 
Warning Indicators
Microsoft SharePoint Server 2010 SP1 is vulnerable.
 
IntelliShield Analysis
To exploit this vulnerability, an attacker must convince a user to visit a specially crafted webpage usually only available to SharePoint administrators.

Microsoft has corrected this vulnerability by modifying the way Microsoft SharePoint performs validation and sanitization of user input.

The Cisco Applied Intelligence team has created an Applied Mitigation Bulletin to address vulnerabilities that Microsoft disclosed in the March 2013 security bulletin release. This Cisco bulletin, which assists administrators in identifying or mitigating these vulnerabilities using Cisco devices, is available at the following link: Cisco Applied Mitigation Bulletin: Microsoft Security Bulletin Release for March 2013

 
Vendor Announcements
Microsoft has released a security bulletin at the following link: MS13-024
 
Impact
An unauthenticated, remote attacker could exploit this vulnerability to execute SharePoint commands in the security context of the affected site. Successful exploitation could allow an attacker to gain elevated privileges, which could be leveraged to conduct further attacks.
 
Technical Information
The vulnerability is due to insufficient validation of user-supplied input processed by the affected software. The affected software improperly handles malicious JavaScript elements contained within a specially crafted site content.

An unauthenticated, remote attacker could exploit this vulnerability by convincing a targeted user to visit a specially crafted webpage. If visited, malicious JavaScript elements contained within the specially crafted webpage could be displayed back to the targeted user's browser, allowing an attacker to perform actions as the targeted user.
 
Safeguards
Administrators are advised to apply the appropriate updates.

For additional information about cross-site scripting attacks and the methods used to exploit these vulnerabilities, see the Cisco Applied Mitigation Bulletin Understanding Cross-Site Scripting (XSS) Threat Vectors

Administrators may consider using the Microsoft Baseline Security Analyzer (MBSA) scan tool to identify common security misconfigurations and missing security updates on system endpoints.

Administrators are advised to monitor affected systems.
 
Patches/Software
Microsoft customers can obtain updates directly by using the links in the security bulletin. These updates are also distributed by Windows automatic update features and available on the Microsoft Update service. Microsoft Windows Server Update Services (WSUS), Systems Management Server, and System Center Configuration Manager can assist administrators in deploying software updates.
 
Alert History
 
Initial Release


Product Sets
 
The security vulnerability applies to the following combinations of products.

Primary Products:
Microsoft, Inc.Office SharePoint Server 2010 SP1

Associated Products:
N/A




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The urgency and severity ratings of this alert are not tailored to individual users; users may value alerts differently based upon their network configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.
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