Microsoft security alert.

Advisory overview

Qualys Vulnerability R&D Lab has released new vulnerability checks in the Enterprise TruRisk Platform to protect organizations against 3 vulnerabilities that were fixed in 1 bulletins announced today by Microsoft. Customers can immediately audit their networks for these and other new vulnerabilities by accessing their Qualys subscription. Visit Qualys Security Blog to prioritize remediation.

Non-Qualys customers can audit their network for these and other vulnerabilities by signing up for a Qualys Free Trial, or by trying Qualys Community Edition.

Vulnerability details

Microsoft has released 1 security bulletins to fix newly discovered flaws in their software. Qualys has released the following checks for these new vulnerabilities:

• Microsoft SharePoint Elevation of Privilege Vulnerability (MS10-039 and KB983438)

  Severity

  Critical 4

  Qualys ID

  90600

  Vendor Reference

  KB983438, MS10-039

  CVE Reference

  CVE-2010-0817, CVE-2010-1257, CVE-2010-1264

  CVSS Scores

  Base 4.3 / Temporal 3.6

  Description

  Windows SharePoint Services 3.0 provides a platform for collaborative applications, offering a common framework for document management and a common repository for storing documents of all types. Microsoft Office SharePoint Server 2007 is an integrated suite of server capabilities built on top of Windows SharePoint Services 3.0.

  SharePoint is prone to the following vulnerabilities:

  - Microsoft Windows SharePoint Services 3.0 and Microsoft Office SharePoint Server 2007 do not properly validate input that is provided to an HTML query before sending this input to the browser.

  - A vulnerability is caused by the way that the toStaticHTML API sanitizes HTML on a SharePoint site.

  - A vulnerability exists due to the way that Microsoft SharePoint handles specially crafted requests sent to the Help page.

  Microsoft has released a security update that addresses these vulnerabilities by modifying the way that Microsoft SharePoint validates input that is provided to an HTTP query, the way that toStaticHTML sanitizes HTML content in Microsoft SharePoint, and the way that Microsoft SharePoint handles specially crafted requests to the Help page.

  This security update also addresses the vulnerability first described in Microsoft Security Advisory 983438.

  Consequence

  The vulnerability could allow an attacker to run arbitrary script that could result in elevation of privilege within the SharePoint site, as opposed to elevation of privilege within the workstation or server environment.

  Solution

  Patch:
  Following are links for downloading patches to fix the vulnerabilities:

  Microsoft Office InfoPath 2003 Service Pack 3

  Microsoft Office InfoPath 2007 Service Pack 1 and Microsoft Office InfoPath 2007 Service Pack 2

  Microsoft Office SharePoint Server 2007 Service Pack 1 (32-bit editions)

  Microsoft Office SharePoint Server 2007 Service Pack 2 (32-bit editions)

  Microsoft Office SharePoint Server 2007 Service Pack 1 (64-bit editions)

  Microsoft Office SharePoint Server 2007 Service Pack 2 (64-bit editions)

  Microsoft Windows SharePoint Services 3.0 Service Pack 1 and Microsoft Windows SharePoint Services 3.0 Service Pack 2 (32-bit versions)

  Microsoft Windows SharePoint Services 3.0 Service Pack 1 and Microsoft Windows SharePoint Services 3.0 Service Pack 2 (64-bit versions)

  Refer to Microsoft Security Bulletin MS10-039 for further details.

  Workaround:
  - Restrict Access to SharePoint Help.aspx
  An administrator can apply an access control list to SharePoint Help.aspx to ensure that it can no longer be loaded. This effectively prevents exploitation of the vulnerability using this attack vector.

  Impact of the workaround: This workaround will disable all help functionality from the SharePoint server.

  - Set Internet and Local intranet security zone settings to "High" to prompt before running ActiveX Controls and Active Scripting.

  Impact of the workaround: On visiting Web sites on the Internet or Intranet that use ActiveX or Active Scripting to provide additional functionality, you will be prompted frequently when you enable this workaround.

Access for Qualys Customers

Platforms and Platform Identification

Technical Support

For more information, customers may contact Qualys Technical Support.

About Qualys

The Enterprise TruRisk Platform and its integrated suite of security and compliance applications provides organizations of all sizes with a global view of their security and compliance solutions, while drastically reducing their total cost of ownership. Qualys solutions include: continuous monitoring, vulnerability management, policy compliance, PCI compliance, security assessment questionnaire, web application scanning, web application firewall, malware detection and SECURE Seal for security testing of web sites.