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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2010.0921 Vulnerability in SChannel Could Allow Denial of Service 13 October 2010 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Internet Information Services (ISS) Publisher: Microsoft Operating System: Windows Vista Windows 7 Windows Server 2008 Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2010-3229 Original Bulletin: http://www.microsoft.com/technet/security/bulletin/MS10-085.mspx - --------------------------BEGIN INCLUDED TEXT-------------------- Microsoft Security Bulletin MS10-085 - Important Vulnerability in SChannel Could Allow Denial of Service (2207566) Version: 1.0 General Information Executive Summary This security update resolves a privately reported vulnerability in the Secure Channel (SChannel) security package in Windows. The vulnerability could allow denial of service if an affected Internet Information Services (IIS) server hosting a Secure Sockets Layer (SSL)-enabled Web site received a specially crafted packet message. By default, IIS is not configured to host SSL Web sites. This security update is rated Important for all supported editions of Windows Vista, Windows Server 2008, Windows 7, and Windows Server 2008 R2. For more information, see the subsection, Affected and Non-Affected Software, in this section. Affected Software 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 7 for 32-bit Systems Windows 7 for x64-based Systems 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 Server 2008 R2 for x64-based Systems Windows Server 2008 R2 for Itanium-based Systems Vulnerability Information TLSv1 Denial of Service Vulnerability - CVE-2010-3229 A denial of service vulnerability exists in the way that SChannel processes client certificates in implementations of Internet Information Services (IIS) 7.0 on Windows Server 2008 and Windows Vista, and in IIS 7.5 on Windows Server 2008 R2 and Windows 7. A remote, anonymous attacker could send a specially crafted network packet to the affected system that would cause the LSASS service to stop responding and the system to restart. Systems are only affected if SSL is enabled, which is not a default configuration. - --------------------------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 iD8DBQFMtOpR/iFOrG6YcBERAvQHAKDFTUnIT3aiBEDnc6YC/wN6sSISFgCcDiaA epC+0Fj5e2ElHKSPezXsneE= =hlVa -----END PGP SIGNATURE-----