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  3. Microsoft SharePoint XML Handling Remote File Disclosure Vulnerability

Microsoft SharePoint XML Handling Remote File Disclosure Vulnerability

Risk

Medium

Date Discovered

September 13, 2011

Description

Microsoft SharePoint is prone to a vulnerability that lets attackers access local files. An attacker can exploit this vulnerability to retrieve local files from a vulnerable computer in the context of the vulnerable service. Information obtained may aid in further attacks.

Technologies Affected

  • Microsoft Groove 2007 SP2
  • Microsoft Groove Server 2010
  • Microsoft Groove Server 2010 SP1
  • Microsoft Office Forms Server 2007 SP2
  • Microsoft Office Groove Data Bridge Server 2007 SP2
  • Microsoft Office Groove Management Server 2007 SP2
  • Microsoft Office Web Apps 2010
  • Microsoft Office Web Apps 2010 SP1
  • Microsoft SharePoint Foundation 2010
  • Microsoft SharePoint Server 2007 SP2
  • Microsoft SharePoint Server 2007 x64 SP2
  • Microsoft SharePoint Server 2010 Enterprise Edition
  • Microsoft SharePoint Server 2010 SP1
  • Microsoft SharePoint Server 2010 Standard Edition
  • Microsoft SharePoint Services 3.0 SP2
  • Microsoft SharePoint Services 64-bit 3.0 SP2
  • Microsoft SharePoint Workspace 2010
  • Microsoft SharePoint Workspace 2010 SP1

Recommendations

Block external access at the network boundary, unless external parties require service.

Filter access to the affected computer at the network boundary if global access isn't required. Restricting access to only trusted computers and networks might greatly reduce the likelihood of a successful exploit.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.

Deploy NIDS to detect and block attacks and anomalous activity. Review logs from network devices regularly.

Run all software as a nonprivileged user with minimal access rights.

Run all server software in a closed or restricted environment such as chroot or jail to limit the consequences of a successful exploit.

Permit privileged access for trusted individuals only.

Allow privileged access to software and resources to known and trusted individuals only.
Vendor updates are available. Please see the references for more information.

Credits

Nicolas Grégoire of Agarri
Copyright © Symantec Corporation.
Permission to redistribute this alert electronically is granted as long as it is not edited in any way unless authorized by Symantec Security Response. Reprinting the whole or part of this alert in any medium other than electronically requires permission from secure@symantec.com.

Disclaimer
The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information.
Symantec, Symantec products, Symantec Security Response, and secure@symantec.com are registered trademarks of Symantec Corp. and/or affiliated companies in the United States and other countries. All other registered and unregistered trademarks represented in this document are the sole property of their respective companies/owners.

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