Microsoft security alert.

Advisory overview

Qualys Vulnerability R&D Lab has released new vulnerability checks in the Enterprise TruRisk Platform to protect organizations against 15 vulnerabilities that were fixed in 6 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 6 security bulletins to fix newly discovered flaws in their software. Qualys has released the following checks for these new vulnerabilities:

• Microsoft Fraudulent Digital Certificates Spoofing Vulnerability (2616676)

  Severity

  Critical 4

  Qualys ID

  100109

  Vendor Reference

  KB2607712, KB2616676

  CVE Reference

  N/A

  CVSS Scores

  Base 8.3 / Temporal 6.5

  Description

  Microsoft is aware of at least one fraudulent digital certificate issued by DigiNotar, a certification authority present in the Trusted Root Certification Authorities Store, on all supported releases of Microsoft Windows.
  The update revokes the trust of the following DigiNotar root certificates by putting them in the Microsoft Untrusted Certificate Store:
  * DigiNotar Root CA Issued by Entrust (2 certificates)
  * DigiNotar Services 1024 CA Issued by Entrust
  * DigiNotar Cyber CA Issued by GTE CyberTrust (3 certificates)
  

  Affected Versions:
  All supported releases of Microsoft Windows.

  Consequence

  An attacker could use these certificates to spoof content, perform phishing attacks, or perform man-in-the-middle attacks against all Web browser users including users of Internet Explorer.

  Solution

  Patch:
  Refer to the following links for downloading patches to fix the vulnerabilities:
  KB2616676 and KB2607712

• Microsoft WINS Elevation of Privilege Vulnerability (MS11-070)

  Severity

  Critical 4

  Qualys ID

  119593

  Vendor Reference

  MS11-070

  CVE Reference

  CVE-2011-1984

  CVSS Scores

  Base 7.2 / Temporal 5.6

  Description

  Windows Internet Name Service (WINS) is a protocol designed specifically to support NetBIOS over TCP/IP (NetBT).

  An elevation of privilege vulnerability exists in the WINS Server, due to improperly processing crafted packets over the loopback interface.

  Consequence

  Exploitation could result in elevation of privilege, which could allow execution of arbitrary code on the local system.

  Solution

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

  Windows Server 2003 Service Pack 2

  Windows Server 2003 x64 Edition Service Pack 2

  Windows Server 2003 with SP2 for Itanium-based Systems

  Windows Server 2008 for 32-bit Systems Service Pack 2

  Windows Server 2008 for x64-based Systems Service Pack 2

  Windows Server 2008 R2 for x64-based Systems and Windows Server 2008 R2 for x64-based Systems Service Pack 1

  Refer to Microsoft Security Bulletin MS11-070 for further details.

• Microsoft Windows Components Remote Code Execution Vulnerability (MS11-071)

  Severity

  Critical 4

  Qualys ID

  90740

  Vendor Reference

  MS11-071

  CVE Reference

  CVE-2011-1991

  CVSS Scores

  Base 9.3 / Temporal 7.7

  Description

  Microsoft Display Panning CPL Extension (deskpan.dll), Microsoft EAPHost Authenticator Service, Microsoft Management Console, Folder Redirection, the Japanese Input Method Editor, and HyperTerminal components are prone to a remote code execution vulnerability.

  The vulnerability occurs when specific Windows components incorrectly restrict the path used for loading external libraries. (CVE-2011-1991)

  Affected Software:
  Windows XP Service Pack 3
  Windows XP Professional x64 Edition Service Pack 2
  Windows Server 2003 Service Pack 2
  Windows Server 2003 x64 Edition Service Pack 2
  Windows Server 2003 with SP2 for Itanium-based Systems
  Windows Vista Service Pack 2
  Windows Vista x64 Edition Service Pack 2
  Windows Server 2008 for 32-bit Systems Service Pack 2
  Windows Server 2008 for x64-based Systems Service Pack 2
  Windows Server 2008 for Itanium-based Systems Service Pack 2
  Windows 7 for 32-bit Systems and Windows 7 for 32-bit Systems Service Pack 1
  Windows 7 for x64-based Systems and Windows 7 for x64-based Systems Service Pack 1
  Windows Server 2008 R2 for x64-based Systems and Windows Server 2008 R2 for x64-based Systems Service Pack 1
  Windows Server 2008 R2 for Itanium-based Systems and Windows Server 2008 R2 for Itanium-based Systems Service Pack 1

  Windows Embedded Systems:- For additional information regarding security updates for embedded systems, refer to the following MSDN blog(s):

  October 2011 Security Updates are Live on ECE for XPe and Standard 2009 (KB2570947)
  

  Consequence

  An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

  Solution

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

  Windows XP Service Pack 3

  Windows XP Professional x64 Edition Service Pack 2

  Windows Server 2003 Service Pack 2

  Windows Server 2003 x64 Edition Service Pack 2

  Windows Server 2003 with SP2 for Itanium-based Systems

  Windows Vista Service Pack 2

  Windows Vista x64 Edition Service Pack 2

  Windows Server 2008 for 32-bit Systems Service Pack 2

  Windows Server 2008 for x64-based Systems Service Pack 2

  Windows Server 2008 for Itanium-based Systems Service Pack 2

  Windows 7 for 32-bit Systems and Windows 7 for 32-bit Systems Service Pack 1

  Windows 7 for x64-based Systems and Windows 7 for x64-based Systems Service Pack 1

  Windows Server 2008 R2 for x64-based Systems and Windows Server 2008 R2 for x64-based Systems Service Pack 1

  Windows Server 2008 R2 for Itanium-based Systems and Windows Server 2008 R2 for Itanium-based Systems Service Pack 1

  Refer to Microsoft Security Bulletin MS11-071 for further details.

• Microsoft Excel Remote Code Execution Vulnerabilities (MS11-072)

  Severity

  Critical 4

  Qualys ID

  110144

  Vendor Reference

  MS11-072

  CVE Reference

  CVE-2011-1986, CVE-2011-1987, CVE-2011-1988, CVE-2011-1989, CVE-2011-1990

  CVSS Scores

  Base 9.3 / Temporal 7.7

  Description

  Microsoft Excel is a proprietary spreadsheet application written and distributed by Microsoft for Windows and Mac OS X.

  Microsoft Excel is vulnerable to multiple remote code execution vulnerabilities.

  This security update is rated Important for all supported editions of Microsoft Excel 2003, Microsoft Excel 2007, Microsoft Office 2007, Microsoft Excel 2010, Microsoft Office 2010, Microsoft Office 2004 for Mac, Microsoft Office 2008 for Mac, and Microsoft Office for Mac 2011; Open XML File Format Converter for Mac; and all supported versions of Microsoft Excel Viewer, Microsoft Office Compatibility Pack, Microsoft Excel Services installed on SharePoint Server 2007, Microsoft Excel Services installed on SharePoint Server 2010, and Microsoft Excel Web App 2010.

  Note: Previously this was an iDefense Exclusive vulnerability with ID:635312

  Consequence

  Successfully exploiting these vulnerabilities might allow a remote attacker to execute arbitrary code.

  Solution

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

  Microsoft Office 2003 Service Pack 3 (Microsoft Excel 2003 Service Pack 3)

  Microsoft Office 2007 Service Pack 2 (Microsoft Excel 2007 Service Pack 2)

  Microsoft Office 2007 Service Pack 2

  Microsoft Office 2010 (32-bit editions) (Microsoft Excel 2010 (32-bit editions))

  Microsoft Office 2010 Service Pack 1 (32-bit editions) (Microsoft Excel 2010 Service Pack 1 (32-bit editions))

  Microsoft Office 2010 and Microsoft Office 2010 Service Pack 1 (32-bit editions)

  Microsoft Office 2010 (64-bit editions) (Microsoft Excel 2010 (64-bit editions))

  Microsoft Office 2010 Service Pack 1 (64-bit editions) (Microsoft Excel 2010 Service Pack 1 (64-bit editions))

  Microsoft Office 2010 and Microsoft Office 2010 Service Pack 1 (64-bit editions)

  Microsoft Office 2004 for Mac

  Microsoft Office 2008 for Mac

  Microsoft Office for Mac 2011

  Open XML File Format Converter for Mac

  Microsoft Excel Viewer Service Pack 2

  Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats Service Pack 2

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

  For a complete list of patch download links, please refer to Microsoft Security Bulletin MS11-072.

  Workaround:
  The vulnerability occurs in the core parsing code of Excel, and this code can not be disabled; however, it is possible to disable the opening of the older binary format files and use MOICE to convert the file to the newer XML-based format.

• Microsoft Office Remote Code Execution Vulnerability (MS11-073)

  Severity

  Critical 4

  Qualys ID

  110157

  Vendor Reference

  MS11-073

  CVE Reference

  CVE-2011-1980, CVE-2011-1982

  CVSS Scores

  Base 9.3 / Temporal 7.7

  Description

  This security update resolves two privately reported vulnerabilities in Microsoft Office.
  The security update addresses the vulnerabilities by correcting the way Microsoft Office loads external libraries and initializes objects.
  This security update is rated Important for all supported editions of Microsoft Office 2003, Microsoft Office 2007, and Microsoft Office 2010.

  Consequence

  The vulnerabilities could allow remote code execution if a user opens a specially crafted Office file or if a user opens a legitimate Office file that is located in the same network directory as a specially crafted library file. An attacker who successfully exploited either of the vulnerabilities could gain the same user rights as the logged on user.

  Solution

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

  Microsoft Office 2003 Service Pack 3

  Microsoft Office 2007 Service Pack 2

  Microsoft Office 2010 (32-bit editions)

  Microsoft Office 2010 Service Pack 1 (32-bit editions)

  Microsoft Office 2010 (64-bit editions)

  Microsoft Office 2010 Service Pack 1 (64-bit editions)

  Refer to Microsoft Security Bulletin MS11-073 for further details.

  Workaround:
  1) Avoid opening Office files received from un-trusted sources.

  2) Use Microsoft Office File Block policy to block the opening of Office 2003 and earlier documents from unknown or untrusted sources and locations. For more information on how to apply file block Policy, refer to cc179230.

  Impact of workaround #2:
  IFor Microsoft Office 2007, users who have configured the File Block policy and have not configured a special exempt directory or have not moved files to a trusted location will be unable to open Office 2003 files or earlier versions. (see KB922850)

  3) Disable loading of libraries from WebDAV and remote network shares.

  4) Disable the WebClient service.

  Impact of workaround #5:
  When the WebClient service is disabled, Web Distributed Authoring and Versioning (WebDAV) requests are not transmitted. In addition, any services that explicitly depend on the Web Client service will not start, and an error message will be logged in the System log.

  5) Block TCP ports 139 and 445 at the firewall.

  Impact of workaround #6:
  Several Windows services use the affected ports. Blocking connectivity to the ports may cause various applications or services to not function.

• Microsoft SharePoint Elevation of Privilege Vulnerability (MS11-074)

  Severity

  Critical 4

  Qualys ID

  110159

  Vendor Reference

  MS11-074

  CVE Reference

  CVE-2011-0653, CVE-2011-1252, CVE-2011-1890, CVE-2011-1891, CVE-2011-1892, CVE-2011-1893

  CVSS Scores

  Base 4.3 / Temporal 3.6

  Description

  Microsoft SharePoint is prone to multiple vulnerabilities that could allow an attacker to conduct privilege escalation attacks.

  Microsoft has released a security update that addresses the vulnerabilities by modifying the way Microsoft SharePoint validates and sanitizes user input, parses malicious XML and XSL files, and handles script contained inside specific request parameters.

  This security update is rated Important for Microsoft Office Groove 2007, Microsoft SharePoint Workspace 2010, Microsoft Office Forms Server 2007, Microsoft Office SharePoint Server 2007, Microsoft Office SharePoint Server 2010, Microsoft Office Groove Data Bridge Server 2007, Microsoft Office Groove Management Server 2007, Microsoft Groove Server 2010, Microsoft SharePoint Services 2.0, Microsoft SharePoint Services 3.0, Microsoft SharePoint Foundation 2010, Microsoft Office Web Apps 2010, and Microsoft Word Web App 2010.

  Consequence

  Exploitation could result in elevation of privilege or information disclosure.

  Solution

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

  Microsoft Office Groove 2007 Service Pack 2

  Microsoft SharePoint Workspace 2010 and Microsoft SharePoint Workspace 2010 Service Pack 1 (32-bit editions)

  Microsoft SharePoint Workspace 2010 and Microsoft SharePoint Workspace 2010 Service Pack 1 (64-bit editions)

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

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

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

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

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

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

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

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

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

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

  For a complete list of patch download links, please refer to Microsoft Security Bulletin MS11-074.

  Workaround:
  1) Enable Internet Explorer 8 and Internet Explorer 9 XSS filter in the Local intranet security zone

  Impact of workaround #1: Internal sites not previously flagged as being XSS risks could be flagged.

Access for Qualys Customers

Platforms and Platform Identification

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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.