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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2011.0419 Vulnerability in DNS Resolution Could Allow Remote Code Execution (2509553) 13 April 2011 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Microsoft Windows Publisher: Microsoft Operating System: Windows XP Windows Server 2003 Windows Vista Windows Server 2008 Windows 7 Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2011-0657 Original Bulletin: http://www.microsoft.com/technet/security/Bulletin/MS11-030.mspx - --------------------------BEGIN INCLUDED TEXT-------------------- Microsoft Security Bulletin MS11-030 - Critical Vulnerability in DNS Resolution Could Allow Remote Code Execution (2509553) Version: 1.0 General Information Executive Summary This security update resolves a privately reported vulnerability in Windows DNS resolution. The vulnerability could allow remote code execution if an attacker gained access to the network and then created a custom program to send specially crafted LLMNR broadcast queries to the target systems. Firewall best practices and standard default firewall configurations can help protect networks from attacks that originate outside the enterprise perimeter. Best practices recommend that systems that are connected to the Internet have a minimal number of ports exposed. In this case, the LLMNR ports should be blocked from the Internet. This security update is rated Critical for all supported editions of Windows Vista, Windows Server 2008, Windows 7, and Windows Server 2008 R2. The security update is rate Important for all supported editions of Windows XP and Windows Server 2003. For more information, see the subsection, Affected and Non-Affected Software, in this section. Affected Software 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 1 and Windows Vista Service Pack 2 Windows Vista x64 Edition Service Pack 1 and Windows Vista x64 Edition Service Pack 2 Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit Systems Service Pack 2* Windows Server 2008 for x64-based Systems and Windows Server 2008 for x64-based Systems Service Pack 2* Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for Itanium-based Systems Service Pack 2 Windows 7 for 32-bit Systems and Windows 7 for 32-bit Systems Service Pack 1 Windows 7 for x64-based Systems and Windows 7 for x64-based Systems Service Pack 1 Windows Server 2008 R2 for x64-based Systems and Windows Server 2008 R2 for x64-based Systems Service Pack 1* Windows Server 2008 R2 for Itanium-based Systems and Windows Server 2008 R2 for Itanium-based Systems Service Pack 1 * Server Core installation affected. This update applies, with the same severity rating, to supported editions of Windows Server 2008 or Windows Server 2008 R2 as indicated, whether or not installed using the Server Core installation option. Vulnerability Information DNS Query Vulnerability - CVE-2011-0657 A remote code execution vulnerability exists in the way that the DNS client service handles specially crafted LLMNR queries. An attacker who successfully exploited this vulnerability could run arbitrary code in the context of the NetworkService account. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. - --------------------------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 iD8DBQFNpNz//iFOrG6YcBERAsLOAKCQIFAnElT5+9nPzpSD2l0cHkEvOACg15F4 xIZIygtJ6xhqtotXFiSmvGY= =HNQ8 -----END PGP SIGNATURE-----