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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2012.0968 Vulnerability in Kerberos Could Allow Denial of Service (2743555) 10 October 2012 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Microsoft Windows Publisher: Microsoft Operating System: Windows 7 Windows Server 2008 Windows Server 2008 R2 Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2012-2551 Original Bulletin: http://technet.microsoft.com/en-us/security/bulletin/MS12-069 - --------------------------BEGIN INCLUDED TEXT-------------------- Microsoft Security Bulletin MS12-069 - Important Vulnerability in Kerberos Could Allow Denial of Service (2743555) Published Date: October 9, 2012 Version: 1.0 General Information Executive Summary This security update resolves a privately reported vulnerability in Microsoft Windows. The vulnerability could allow denial of service if a remote attacker sends a specially crafted session request to the Kerberos server. 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. This security update is rated Important for all supported editions of Windows 7 and Windows Server 2008 R2. For more information, see the subsection, Affected and Non-Affected Software, in this section. Affected Software 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 Windows Server 2008 R2 for x64-based Systems (Server Core installation) Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) Vulnerability Information Kerberos NULL Dereference Vulnerability - CVE-2012-2551 A denial of service vulnerability exists when the Microsoft Kerberos implementation fails to properly handle a specially crafted session. An attacker who successfully exploited this vulnerability could cause the system to stop responding and restart. - --------------------------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 iQIVAwUBUHTFEO4yVqjM2NGpAQJPahAAo/4Mqd/C5sX7Y3rEBUH7EhoMshGH88gc mu9Xo+5diH8iAz/cIedEALhw27PGPxjhwA9quVp+nMkLZUHBGR/u+fW58bJfTouK ojKGNibNAUCo/DHiuMOahAGLslSny6OVMGQyIxfMNXdv2M/kZaYxZ7ls76394BHG mhO1dSpj+nc7mh1ha7OvFn6gU1m0VSUO/lGb8Q3B23XFI2OxMMC1MvDe3NSlLliQ YXDX2Rr9etq7xzrTeUQzZixcGuj//KaE0EuyNn+bDf7SuNBhj4Pz1OWRvga1Rwsa TQpIDzt7ICirhJiLUZ2Ja9c2kJA3tdU4vqiJJ4Ui1mX+SzvDX4QYVFPJEuBS3fcE vLGEjOebuTIxNAf+hkXXtZjQFC9gE1IvlSdHFhSYi9YM280G5aEClDgqijVXnm/p 4jKQdnxZ7ShoJEL7FfNElzqs9xZ39p38PfaUHQVSGbSfv7guyTC7tXK4Qqai8HxY 0BOAmchExLqr/C9C1GxAer4tOe3mcmNPEuwMYtGfyZhf6QtMFjQ36N2SIlIQUe3P uL+7cuucfhg7pUu47RdUCnXBoJQSUFZ/ymM7Pu9g4SSOqke++4ka0aw6QYmZzE2Q ZBzmSX5J77FL7hGEOVizzcerYOF+PHVRJOCRxOzWNaXH6cOZKHQ50iB5SYjhM0/T KbsO8CufWQo= =rJuT -----END PGP SIGNATURE-----