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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2012.0540 Vulnerabilities in Lync Could Allow Remote Code Execution (2707956) 13 June 2012 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Lync Publisher: Microsoft Operating System: Windows Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction Access Confidential Data -- Remote with User Interaction Cross-site Scripting -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2012-1858 CVE-2012-1849 CVE-2012-0159 CVE-2011-3402 Reference: ESB-2012.0534 ESB-2012.0444 ESB-2011.1235.2 ESB-2011.1106 Original Bulletin: http://technet.microsoft.com/en-us/security/bulletin/MS12-039 - --------------------------BEGIN INCLUDED TEXT-------------------- Microsoft Security Bulletin MS12-039 - Important Vulnerabilities in Lync Could Allow Remote Code Execution (2707956) Published Date: June 12, 2012 | Updated Date: Unspecified 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). 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. Affected Software Microsoft Communicator 2007 R2 Microsoft Lync 2010 (32-bit) Microsoft Lync 2010 (64-bit) Microsoft Lync 2010 Attendee Microsoft Lync 2010 Attendant (32-bit) Microsoft Lync 2010 Attendant (64-bit) Vulnerability Information TrueType Font Parsing Vulnerability - CVE-2011-3402 A remote code execution vulnerability exists in the way that affected components handle shared content that contains specially crafted TrueType fonts. The vulnerability could allow remote code execution if a user views shared content that contains specially crafted TrueType fonts. 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. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. To view this vulnerability as a standard entry in the Common Vulnerabilities and Exposures list, see CVE-2011-3402. TrueType Font Parsing Vulnerability - CVE-2012-0159 A remote code execution vulnerability exists in the way that affected components handle shared content that contains specially crafted TrueType fonts. The vulnerability could allow remote code execution if a user views shared content that contains specially crafted TrueType fonts. 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. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. To view this vulnerability as a standard entry in the Common Vulnerabilities and Exposures list, see CVE-2012-0159. Lync Insecure Library Loading Vulnerability - CVE-2012-1849 A remote code execution vulnerability exists in the way that Microsoft Lync handles the loading of DLL files. 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. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. To view this vulnerability as a standard entry in the Common Vulnerabilities and Exposures list, see CVE-2012-1849. HTML Sanitization Vulnerability - CVE-2012-1858 An information disclosure vulnerability exists in the way that HTML is filtered that could allow an attacker to perform cross-site scripting attacks and run script in the security context of the current user. To view this vulnerability as a standard entry in the Common Vulnerabilities and Exposures list, see CVE-2012-1858. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBT9f5ru4yVqjM2NGpAQIazQ/9Gz2SkLCWW7NeNfve6llcsq4KMEn95kxE 3yrJtWZiuPG1DtsZTeTKrefECE2Fh6tPlkcOYtxKhTqFvwDQV29P0Pr1bvzKOQv4 BIV3klLJEBvWEd4AP8z0V96j+rdcnplYVp98SbrXcxfOL2r5ivZrnr/lOZSfFe7C U/MJvc0ZMUNsZFbqaXuSQT5+ja+YHVkpKJNpQVJZMlD9W77CqR15OMk5nsQdK4wk yr2AHX8ZMHo26wubj63DZ/2aCq84eh+RbtbX2VtE1xVpr4FQQoE9Ur0/57gwNzaq fWl6LdgyaOecwvdn72L/nFzN2jqapIzIBEodRv/Dkqm89CoJbht1OEOqfdnouh7C gdoHj1ASMnZ8vuT5Zc62Bn31j+adJN3WlpGqNXqNSoonwNmmxEHQKlPStx6jq4yp 0FU7fX9ue456DKybowr+Q58jCTs1Q66VYAAd1FFGQzKowlfJQWVURn8yXpk8z/Zd jokCVKqAckV0Yxvz3pLF5VoSJJIGztZpTgkGWeJjaTNMVKH0t/b/NLCFs7qM94tX U2E3sB0ODbrtwM1MPqTmBdXmee0CgEX0zXWMF6WRSW9jxkI7R2YuOTDG4GoHiZ3x er7oHWzX0xOxIXk0qzQotHAOII+RzeMyKaBgO7WzrKreZlCcBrQCZ7htTWw6xLaP HamZfw9Ne68= =njwM -----END PGP SIGNATURE-----