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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2015.2076 Microsoft Security Bulletin MS15-092: Vulnerabilities in .NET Framework Could Allow Elevation of Privilege (3086251) 12 August 2015 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Microsoft .NET Framework Publisher: Microsoft Operating System: Windows Impact/Access: Increased Privileges -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2015-2481 CVE-2015-2480 CVE-2015-2479 Original Bulletin: https://technet.microsoft.com/en-us/library/security/MS15-092 - --------------------------BEGIN INCLUDED TEXT-------------------- Microsoft Security Bulletin MS15-092: Vulnerabilities in .NET Framework Could Allow Elevation of Privilege (3086251) Bulletin Number: MS15-092 Bulletin Title: Vulnerabilities in .NET Framework Could Allow Elevation of Privilege Severity: Important KB Article: 3086251 Version: 1.0 Published Date: August 11, 2015 Executive Summary This security update resolves vulnerabilities in Microsoft .NET Framework. The vulnerabilities could allow elevation of privilege if a user runs a specially crafted .NET application. However, in all cases, an attacker would have no way to force users to run the application; an attacker would have to convince users to do so. This security update is rated Important for Microsoft .NET Framework 4.6 on all supported releases of Microsoft Windows except Itanium editions. For more information, see the Affected Software section. Affected Software Windows Vista Windows Vista Service Pack 2 Windows Vista x64 Edition Service Pack 2 Windows Server 2008 Windows Server 2008 for 32-bit Systems Service Pack 2 Windows Server 2008 for x64-based Systems Service Pack 2 Windows 7 Windows 7 for 32-bit Systems Service Pack 1 Windows 7 for x64-based Systems Service Pack 1 Windows Server 2008 R2 Windows Server 2008 R2 for x64-based Systems Service Pack 1 Windows 8 and Windows 8.1 Windows 8 for 32-bit Systems Windows 8 for x64-based Systems Windows 8.1 for 32-bit Systems Windows 8.1 for x64-based Systems Windows Server 2012 and Windows Server 2012 R2 Windows Server 2012 Windows Server 2012 R2 Windows RT and Windows RT 8.1 Windows RT[1] Windows RT 8.1[1] Windows 10 Windows 10 for 32-bit Systems[2] Windows 10 for x64-based Systems[2] Server Core installation option Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) Windows Server 2012 (Server Core installation) Windows Server 2012 R2 (Server Core installation) [1]The security updates for Windows RT operating systems are available via Windows Update only. [2]The Windows 10 update is cumulative. In addition to containing non-security updates, it also contains all of the security fixes for all of the Windows 10-affected vulnerabilities shipping with this months security release. The update is available via the Windows Update Catalog only. See Microsoft Knowledge Base Article 3081435 for more information and download links. Vulnerability Information Multiple RyuJIT Optimization Elevation of Privilege Vulnerabilities Elevation of privilege vulnerabilities exist in Microsoft .NET Framework when the RyuJIT compiler improperly optimizes certain parameters resulting in a code generation error. 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 exploit these vulnerabilities, an attacker would need to host a specially crafted .NET application and convince users to run the application. However, in all cases, an attacker would have no way to force users to run the application; an attacker would have to convince users to do so. The security update addresses the vulnerabilities by correcting RyuJIT compiler optimization for .NET Framework. The following tables contain links to the standard entry for each vulnerability in the Common Vulnerabilities and Exposures list: Vulnerability Title CVE Number Publicly Disclosed Exploited RyuJIT Optimization Elevation CVE-2015-2479 No No of Privilege Vulnerability RyuJIT Optimization Elevation CVE-2015-2480 No No of Privilege Vulnerability RyuJIT Optimization Elevation CVE-2015-2481 No No of Privilege Vulnerability - --------------------------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. 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If you have any questions or need further information, please contact them directly. 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 iQIVAwUBVcqOQH6ZAP0PgtI9AQJsPg//XypYgHV9xc0/4q/wmnHjQxhgs+ySqdMY X1hbobwPVOtqmlzvTjFS88Eow+k1DI7i3AOUt7CK1PpQQ1T9AWYOVNfiWawdrw2O rDMj90slplw7cHHkICSVWS/JHBcsvaDovyjA25mdY5RG5JNE6a3Me1nv2BX7mesp ovL21dtlO7nZG7b4sKBBKe9kRiVAmS28eGy5zvx0B4q9fSPcfzn20CyDO7HDVTT+ RSb+HHhAyZWE2cD9l5EWTHsU/ZupuK9CjSv3yWUUY8rQXlPM+Lne0Cqdf5kfVq+A pT1mkxtYWZLoAkATrzOTnz2C1qswsjSqnjH5MAffchvYvtZa4F7HzY8BaVF8qoKF AjQdKHi2TcmlzWe30PqMUoD2peHPb0KU5pis9ono5pCwilnIJmYsu4XA98zPWSQz MXr3YcBy1veLLCll5aiODNquSNI9PWf1rbud5NJlWXGpoTVwvsDAVQ1AXf5qgQgq A1vlem7wKF0Y9Fcvffe879YduzcRShd+O8plePU8BJtaUMA07+RWO6+oLr5NqQMp wntqoBMmFFF8BZ04/HvDHPRC79kcDZTj/KOBg6tTqLNjJk0qM5EC2NGm+FxYOW+c Cb1OUSNz3gsb8UmMdgGQ33Bshqbr9YF3vY77G37z0ujc37WMSCtiGqa1BvkyowRv URC8+XbvOx8= =EgnD -----END PGP SIGNATURE-----