Kod programskog paketa Microsoft Lync uočeno je i ispravljeno više sigurnosnih propusta. Udaljeni napadač je spomenute nepravilnosti mogao iskoristiti za čitanje povjerljivih informacija te izvršavanje proizvoljnog programskog koda.

Microsoft Security Bulletin MS12-039 - Important
Vulnerabilities in Lync Could Allow Remote Code Execution (2707956)

Published: Tuesday, June 12, 2012

Version: 1.0
General Information

This security update resolves one publicly disclosed vulnerability and three privately reported vulnerabilities in Microsoft Lync. The most severe vulnerabilities could allow remote code execution if a user views shared content that contains specially crafted TrueType fonts.

This security update is rated Important for Microsoft Lync 2010, Microsoft Lync 2010 Attendee, Microsoft Lync 2010 Attendant (32-bit), and Microsoft Lync 2010 Attendant (64-bit). For more information, see the subsection, Affected and Non-Affected Software, in this section.

The security update addresses the vulnerabilities by correcting how specially crafted True Type Font files are handled, correcting the manner in which Microsoft Lync loads external libraries, and modifying the way that SafeHTML function sanitizes HTML content. 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. Customers can configure automatic updating to check online for updates from Microsoft Update by using the Microsoft Update service. Customers who have automatic updating enabled and configured to check online for updates from Microsoft Update typically will not need to take any action because this security update will be downloaded and installed automatically. Customers who have not enabled automatic updating need to check for updates from Microsoft Update and install this update manually. For information about specific configuration options in automatic updating in supported editions of Windows XP and Windows Server 2003, see Microsoft Knowledge Base Article 294871. For information about automatic updating in supported editions of Windows Vista, Windows Server 2008, Windows 7, and Windows Server 2008 R2, see Understanding Windows automatic updating.

For administrators and enterprise installations, or end users who want to install this security update manually, Microsoft recommends that customers apply the update at the earliest opportunity using update management software, or by checking for updates using the Microsoft Update service.

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

Known Issues. Microsoft Knowledge Base Article 2707956 documents the currently known issues that customers may experience when installing this security update. The article also documents recommended solutions for these issues.
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 Communicator 2007 R2
(KB2708980)	Information Disclosure	Important	None
Microsoft Lync 2010 (32-bit)
(KB2693282)	Remote Code Execution	Important	None
Microsoft Lync 2010 (64-bit)
(KB2693282)	Remote Code Execution	Important	None
Microsoft Lync 2010 Attendee
(admin level install)
(KB2696031)

Microsoft Lync 2010 Attendee[1]
(user level install)
(KB2693283)	Remote Code Execution	Important	None
Microsoft Lync 2010 Attendant (32-bit)
(KB2702444)	Remote Code Execution	Important	None
Microsoft Lync 2010 Attendant (64-bit)
(KB2702444)	Remote Code Execution	Important	None

[1]This update is available from the Microsoft Download Center only.

Non-Affected Software 
Office and Other Software
Microsoft Speech Server 2004
Microsoft Speech Server 2004 R2
Microsoft Live Meeting 2007 Console
Microsoft Live Communications Server 2003
Microsoft Live Communications Server 2005 Service Pack 1
Microsoft Communicator 2005
Microsoft Communicator 2005 Web Access
Microsoft Communicator 2007
Microsoft Communicator 2007 Web Access
Microsoft Communications Server 2007
Microsoft Communications Server 2007 Speech Server
Microsoft Communications Server 2007 R2
Microsoft Communicator 2007 R2 Attendant
Microsoft Communicator 2007 R2 Group Chat Admin
Microsoft Communicator 2007 R2 Group Chat Client
Microsoft Communicator for Mac 2011
Microsoft Lync for Mac 2011
Microsoft Lync Server 2010
Microsoft Lync Server 2010 Software Development Kit
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Frequently Asked Questions (FAQ) Related to This Security Update
Vulnerability Information
Severity Ratings and Vulnerability Identifiers
TrueType Font Parsing Vulnerability - CVE-2011-3402
TrueType Font Parsing Vulnerability - CVE-2012-0159
Lync Insecure Library Loading Vulnerability - CVE-2012-1849
HTML Sanitization Vulnerability - CVE-2012-1858
Update Information
Detection and Deployment Tools and Guidance
Security Update Deployment
Other Information
Acknowledgments

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

    hamburgers maccoy via Secunia SVCRP for reporting the Lync Insecure Library Loading Vulnerability (CVE-2012-1849)
    Adi Cohen of IBM Security Systems - Application Security for reporting the HTML Sanitization Vulnerability (CVE-2012-1858)
    Alin Rad Pop, working with Tipping Point's Zero Day Initiative, for reporting the TrueType Font Parsing Vulnerability (CVE-2012-0159)

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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.
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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

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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.
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Revisions

    V1.0 (June 12, 2012): Bulletin published.