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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2012.0760 Cumulative Security Update for Internet Explorer (2722913) 15 August 2012 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cumulative Security Update for Internet Explorer (2722913) Publisher: Microsoft Operating System: Windows XP Windows Server 2003 Windows Vista Windows Server 2008 Windows Server 2008 R2 Windows 7 Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2012-2523 CVE-2012-2522 CVE-2012-2521 CVE-2012-1526 Original Bulletin: http://technet.microsoft.com/en-us/security/bulletin/MS12-052 - --------------------------BEGIN INCLUDED TEXT-------------------- Microsoft Security Bulletin MS12-052 - Critical Cumulative Security Update for Internet Explorer (2722913) Published Date: August 14, 2012 Version: 1.0 General Information Executive Summary This security update resolves four privately reported vulnerabilities in Internet Explorer. The most severe vulnerabilities could allow remote code execution if a user views a specially crafted webpage using Internet Explorer. An attacker who successfully exploited any of these vulnerabilities could gain the same user rights as the current user. 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. This security update is rated Critical for Internet Explorer 6, Internet Explorer 7, Internet Explorer 8, and Internet Explorer 9 on Windows clients and Moderate for Internet Explorer 6, Internet Explorer 7, Internet Explorer 8, and Internet Explorer 9 on Windows servers. For more information, see the subsection, Affected and Non-Affected Software, in this section. Affected Software Internet Explorer 6 Internet Explorer 7 Internet Explorer 8 Internet Explorer 9 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 Windows 7 for 32-bit Systems Service Pack 1 Windows 7 for x64-based Systems Windows 7 for x64-based Systems Service Pack 1 Windows Server 2008 R2 for x64-based Systems Windows Server 2008 R2 for x64-based Systems Service Pack 1 Windows Server 2008 R2 for Itanium-based Systems Windows Server 2008 R2 for Itanium-based Systems Service Pack 1 Vulnerability Information Layout Memory Corruption Vulnerability - CVE-2012-1526 A remote code execution vulnerability exists in the way that Internet Explorer accesses an object that has not been correctly initialized or has been deleted. The vulnerability may corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. Asynchronous NULL Object Access Remote Code Execution Vulnerability - CVE-2012-2521 A remote code execution vulnerability exists in the way that Internet Explorer accesses an object that has been deleted. The vulnerability may corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. Virtual Function Table Corruption Remote Code Execution Vulnerability - CVE-2012-2522 A remote code execution vulnerability exists in the way that Internet Explorer accesses a corrupted virtual function table that has been deleted. The vulnerability may corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. JavaScript Integer Overflow Remote Code Execution Vulnerability - CVE-2012-2523 A remote code execution vulnerability exists in the way that Internet Explorer calculates the size of an object in memory during a copy operation. The vulnerability may corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. - --------------------------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. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. 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 iQIVAwUBUCrwxe4yVqjM2NGpAQJk+w//cQCDFHJHXZOpeeIgE019N0nyyEJ5Rmeo LFa2C89yMcxjsrurnEti4jJlxRbi8TWmbK9+kYu2Vqv+N0AHybBcSHW7bKxfUKFY 6GiXKeHfgxVOcGAfkekHhYk2TW1qq00StVMNNDmCP+m8fk33oJB6nXla1iKyy13T WTmHkyGqdLCneFDKSuRJYe6uymHhHFQ34XkukfsbkwYoCLJmitaKn0CWvyTJKsDv zYEUFQYm83nLG5ten2Dab14T5AVcA8eh/5XDaXE/AhtorveyJmIJQO016c4vsrBT e4jxHpYgIkJHJD3YZRNiG7fi6TYursJlsOhcsCU5kNiYR1X4Lrgb/CIsEONcYH7F GRt1DNIceugYbnAgtgGSbj67dqxf0ybDwQfQnxkSvtwn5bagE9oru0lzWpmn49Yy FZMeLu9+i1JHdkYbusOMiBMTzStnvdi+CfqkIzuxWKoofkLaYQ12AEackxhy1Ck9 iXKQtci27fTKHZfUDzm6Ca69kt6QseoVVH8P2L6nQm747uOLP/dw6YakoRXbwzCj u7nEhhyCruSgod+FBE1R8W92H/wGYldSXhwrzG18seo6QslYQGyYysUAFCQ/lNfV +cYQJDqLkbIAO7lXUWAcqXUaKpg1Wzk92WfgXWnkci/1Wrs0nEKdWG/+6DTL5me6 RHYvROrHTeY= =+M/H -----END PGP SIGNATURE-----