Microsoft Security Bulletin MS12-026 - Important

Vulnerabilities in Forefront Unified Access Gateway (UAG) Could Allow Information Disclosure (2663860)

Published: Tuesday, April 10, 2012 | Updated: Wednesday, April 18, 2012

Version: 1.1

General Information

Executive Summary

This security update resolves two privately reported vulnerabilities in Microsoft Forefront Unified Access Gateway (UAG). The more severe of the vulnerabilities could allow information disclosure if an attacker sends a specially crafted query to the UAG server.

This security update is rated Important for Microsoft Forefront Unified Access Gateway 2010 Service Pack 1 and Microsoft Forefront Unified Access Gateway 2010 Service Pack 1 Update 1. For more information, see the subsection, Affected and Non-Affected Software, in this section.

The security update addresses the vulnerabilities by modifying UAG code to require further verification before redirecting a user to another website, and by modifying the UAG server's default binding settings to not allow unfiltered access to internal resources. For more information about the vulnerabilities, see the Frequently Asked Questions (FAQ) subsection for the specific vulnerability entry under the next section, Vulnerability Information.

Recommendation. Microsoft recommends that customers apply the update at the earliest opportunity.

See also the section, Detection and Deployment Tools and Guidance, later in this bulletin.

Known Issues. Microsoft Knowledge Base Article 2663860 documents the currently known issues that customers may experience when installing this security update. The article also documents recommended solutions for these issues. When currently known issues and recommended solutions pertain only to specific releases of this software, this article provides links to further articles.

Affected and Non-Affected Software

The following software have been tested to determine which versions or editions are affected. Other versions or editions are either past their support life cycle or are not affected. To determine the support life cycle for your software version or edition, visit Microsoft Support Lifecycle.

Affected Software

Software	Maximum Security Impact	Aggregate Severity Rating	Updates Replaced
Microsoft Forefront Unified Access Gateway 2010 Service Pack 1^[1] (KB2649261)	Information Disclosure	Important	KB2522485 in MS11-079 replaced by KB2649261
Microsoft Forefront Unified Access Gateway 2010 Service Pack 1 Update 1^[1] (KB2649262)	Information Disclosure	Important	None

^[1]This update is available from the Microsoft Download Center only. Please see the next section, Frequently Asked Questions (FAQ) Related to This Security Update.

Non-Affected Software

Software
Microsoft Forefront Unified Access Gateway 2010
Microsoft Forefront Unified Access Gateway 2010 Update 1
Microsoft Forefront Unified Access Gateway 2010 Update 2

Frequently Asked Questions (FAQ) Related to This Security Update

Why are the updates only available from the Microsoft Download Center?
Microsoft is releasing these updates to the Microsoft Download Center so that customers can begin updating their systems as soon as possible.

Where are the file information details?
Refer to the reference tables in the Security Update Deployment section for the location of the file information details.

I am running software that is listed in the Affected Software table. Why am I not being offered the update?
This update is offered via the download center only and will not be offered through Microsoft Update.

Why does this update address several reported security vulnerabilities?
This update contains support for several vulnerabilities because the modifications that are required to address these issues are located in related files. Instead of having to install several updates that are almost the same, customers need to install this update only.

Do administrators need to perform any additional actions after installing this update?
Yes. After installing this update, the UAG administrator needs to open the Forefront UAG Management console and activate the configuration for customers to be protected from the vulnerabilities described in this bulletin.

I am using an older release of the software discussed in this security bulletin. What should I do?
The affected software listed in this bulletin have been tested to determine which releases are affected. Other releases are past their support life cycle. For more information about the product lifecycle, visit the Microsoft Support Lifecycle website.

It should be a priority for customers who have older releases of the software to migrate to supported releases to prevent potential exposure to vulnerabilities. To determine the support lifecycle for your software release, see Select a Product for Lifecycle Information. For more information about service packs for these software releases, see Service Pack Lifecycle Support Policy.

Customers who require custom support for older software must contact their Microsoft account team representative, their Technical Account Manager, or the appropriate Microsoft partner representative for custom support options. Customers without an Alliance, Premier, or Authorized Contract can contact their local Microsoft sales office. For contact information, visit the Microsoft Worldwide Information website, select the country in the Contact Information list, and then click Go to see a list of telephone numbers. When you call, ask to speak with the local Premier Support sales manager. For more information, see the Microsoft Support Lifecycle Policy FAQ.

Vulnerability Information

Severity Ratings and Vulnerability Identifiers

Vulnerability Severity Rating and Maximum Security Impact by Affected Software
Affected Software	UAG Blind HTTP Redirect Vulnerability - CVE-2012-0146	Unfiltered Access to UAG Default Website Vulnerability - CVE-2012-0147	Aggregate Severity Rating
Microsoft Forefront Unified Access Gateway 2010 Service Pack 1	Moderate Spoofing	Important Information Disclosure	Important
Microsoft Forefront Unified Access Gateway 2010 Service Pack 1 Update 1	Moderate Spoofing	Important Information Disclosure	Important

UAG Blind HTTP Redirect Vulnerability - CVE-2012-0146

A spoofing vulnerability exists in Forefront Unified Access Gateway (UAG) that could lead to information disclosure. The vulnerability could allow spoofing by redirecting web traffic intended for the UAG server to a malicious website. To exploit the vulnerability, an attacker could send a link that has a specially crafted URL to a user of a UAG server, and convince the user to click the link. When an authenticated UAG user clicks the link, the authenticated user's browser session could be redirected to a malicious site that is designed to impersonate a legitimate UAG web interface. By doing so, the attacker could trick the user and potentially acquire sensitive information, such as the user's credentials.

To view this vulnerability as a standard entry in the Common Vulnerabilities and Exposures list, see CVE-2012-0146.

Mitigating Factors for UAG Blind HTTP Redirect Vulnerability - CVE-2012-0146

Workarounds for UAG Blind HTTP Redirect Vulnerability - CVE-2012-0146

FAQ for UAG Blind HTTP Redirect Vulnerability - CVE-2012-0146

Unfiltered Access to UAG Default Website Vulnerability - CVE-2012-0147

A vulnerability exists in Microsoft Unified Access Gateway (UAG) that could allow an unauthenticated user to access the default website of the Microsoft UAG server from the external network.

To view this vulnerability as a standard entry in the Common Vulnerabilities and Exposures list, see CVE-2012-0147.

Mitigating Factors for Unfiltered Access to UAG Default Website Vulnerability - CVE-2012-0147

Workarounds for Unfiltered Access to UAG Default Website Vulnerability - CVE-2012-0147

FAQ for Unfiltered Access to UAG Default Website Vulnerability - CVE-2012-0147

Update Information

Detection and Deployment Tools and Guidance

Security Update Deployment

Inclusion in Future Service Packs	The update for this issue will be included in a future service pack or update rollup
Deployment
Installing without user intervention	For Forefront Unified Access Gateway 2010 Service Pack 1 (KB2649261): UAG-KB2649261-v4.0.1753.10076-ENU.msp /quiet
	For Forefront Unified Access Gateway 2010 Service Pack 1 Update 1(KB2649262): UAG-KB2649262-v4.0.1773.10190-ENU.msp /quiet
Installing without restarting	For Forefront Unified Access Gateway 2010 Service Pack 1 (KB2649261): UAG-KB2649261-v4.0.1753.10076-ENU.msp /norestart
	For Forefront Unified Access Gateway 2010 Service Pack 1 Update 1(KB2649262): UAG-KB2649262-v4.0.1773.10190-ENU.msp /norestart
Update log file	For Forefront Unified Access Gateway 2010 Service Pack 1 (KB2649261): MSI2649261.log
	For Forefront Unified Access Gateway 2010 Service Pack 1 Update 1(KB2649262): MSI2649262.log
Further information	See the subsection, Detection and Deployment Tools and Guidance
Restart Requirement
Restart required?	In some cases, this update does not require a restart. If the required files are being used, this update will require a restart. If this behavior occurs, a message appears that advises you to restart. To help reduce the chance that a restart will be required, stop all affected services and close all applications that may use the affected files prior to installing the security update. For more information about the reasons why you may be prompted to restart, see Microsoft Knowledge Base Article 887012.
HotPatching	Not applicable
Removal Information	Use the Installed Updates window as build-in Administrator or run msiexec from an elevated command line.
File Information	For Forefront Unified Access Gateway 2010 Service Pack 1 (KB2649261): See Microsoft Knowledge Base Article 2649261
	For Forefront Unified Access Gateway 2010 Service Pack 1 Update 1(KB2649262): See Microsoft Knowledge Base Article 2649262
Registry Key Verification	Not applicable

Supported Security Update Installation Switches
Switch	Description
/help	Displays the command-line options.
Setup Modes
/passive	Unattended Setup mode. No user interaction is required, but installation status is displayed. If a restart is required at the end of Setup, a dialog box will be presented to the user with a timer warning that the computer will restart in 30 seconds.
/quiet	Quiet mode. This is the same as unattended mode, but no status or error messages are displayed.
Restart Options
/norestart	Does not restart when installation has completed.
/forcerestart	Restarts the computer after installation and force other applications to close at shutdown without saving open files first.
/warnrestart[:x]	Presents a dialog box with a timer warning the user that the computer will restart in x seconds. (The default setting is 30 seconds.) Intended for use with the /quiet switch or the /passive switch.
/promptrestart	Displays a dialog box prompting the local user to allow a restart.
Special Options
/overwriteoem	Overwrites OEM files without prompting.
/nobackup	Does not back up files needed for uninstall.
/forceappsclose	Forces other programs to close when the computer shuts down.
/log:path	Allows the redirection of installation log files.
/integrate:path	Integrates the update into the Windows source files. These files are located at the path that is specified in the switch.
/extract[:path]	Extracts files without starting the Setup program.
/ER	Enables extended error reporting.
/verbose	Enables verbose logging. During installation, creates %Windir%\CabBuild.log. This log details the files that are copied. Using this switch may cause the installation to proceed more slowly.

Supported Spuninst.exe Switches
Switch	Description
/help	Displays the command-line options.
Setup Modes
/passive	Unattended Setup mode. No user interaction is required, but installation status is displayed. If a restart is required at the end of Setup, a dialog box will be presented to the user with a timer warning that the computer will restart in 30 seconds.
/quiet	Quiet mode. This is the same as unattended mode, but no status or error messages are displayed.
Restart Options
/norestart	Does not restart when installation has completed
/forcerestart	Restarts the computer after installation and force other applications to close at shutdown without saving open files first.
/warnrestart[:x]	Presents a dialog box with a timer warning the user that the computer will restart in x seconds. (The default setting is 30 seconds.) Intended for use with the /quiet switch or the /passive switch.
/promptrestart	Displays a dialog box prompting the local user to allow a restart.
Special Options
/forceappsclose	Forces other programs to close when the computer shuts down.
/log:path	Allows the redirection of installation log files.

Other Information

Acknowledgments

Microsoft thanks the following for working with us to help protect customers:

Kai Wilke of ITaCS GmbH for reporting the UAG Blind HTTP Redirect Vulnerability (CVE-2012-0146)
Kai Wilke of ITaCS GmbH for reporting the Unfiltered Access to UAG Default Website Vulnerability (CVE-2012-0147)

Microsoft Active Protections Program (MAPP)

To improve security protections for customers, Microsoft provides vulnerability information to major security software providers in advance of each monthly security update release. Security software providers can then use this vulnerability information to provide updated protections to customers via their security software or devices, such as antivirus, network-based intrusion detection systems, or host-based intrusion prevention systems. To determine whether active protections are available from security software providers, please visit the active protections websites provided by program partners, listed in Microsoft Active Protections Program (MAPP) Partners.

Support

How to obtain help and support for this security update

Help installing updates: Support for Microsoft Update
Security solutions for IT professionals: TechNet Security Troubleshooting and Support
Help protect your computer that is running Windows from viruses and malware: Virus Solution and Security Center
Local support according to your country: International Support

Disclaimer

The information provided in the Microsoft Knowledge Base is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

Revisions

V1.0 (April 10, 2012): Bulletin published
V1.1 (April 18, 2012): Corrected the bulletin replacement information for Microsoft Forefront Unified Access Gateway 2010 Service Pack 1. This is a bulletin change only. There were no changes to the detection or security update files.