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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2008.0792 -- [Win] MS08-047 - Vulnerability in IPsec Policy Processing Could Allow Information Disclosure 13 August 2008 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: IPsec Publisher: Microsoft Operating System: Windows Server 2008 Windows Vista Impact: Access Confidential Data Access: Remote/Unauthenticated CVE Names: CVE-2008-2246 Original Bulletin: http://www.microsoft.com/technet/security/bulletin/ms08-047.mspx - --------------------------BEGIN INCLUDED TEXT-------------------- Microsoft Security Bulletin MS08-047 - Important Vulnerability in IPsec Policy Processing Could Allow Information Disclosure (953733) Published: August 12, 2008 Version: 1.0 General Information Executive Summary This update resolves a privately reported vulnerability in the way certain Windows Internet Protocol Security (IPsec) rules are applied. This vulnerability could cause systems to ignore IPsec policies and transmit network traffic in clear text. This, in turn, would disclose information intended to be encrypted on the network. An attacker viewing the traffic on the network would be able to view and possibly modify the contents of the traffic. Note that this vulnerability would not allow an attacker to execute code or to elevate their user rights directly. It could be used to collect useful information to try to further compromise the affected system or network. This update is rated Important for all supported versions of Windows Vista and Windows Server 2008. For more information, see the subsection, Affected Software, in this section. Recommendation. Microsoft recommends that customers apply the update at the earliest opportunity. Affected Software Windows Vista and Windows Vista Service Pack 1 Windows Vista x64 Edition and Windows Vista x64 Edition Service Pack 1 Windows Server 2008 for 32-bit Systems Windows Server 2008 for x64-based Systems Windows Server 2008 for Itanium-based Systems Vulnerability Information IPsec Policy Information Disclosure Vulnerability - CVE-2008-2246 An information disclosure vulnerability exists in the manner in which IPsec policies are imported to Windows Server 2008 domains from Windows Server 2003 domains. This vulnerability could cause systems to ignore IPsec policies and transmit network traffic in clear text. This, in turn, would potentially disclose information intended to be encrypted on the network. An attacker intercepting the traffic on the network would be able to view and possibly modify the contents of the traffic. Note that this vulnerability would not allow an attacker to execute code or to elevate their user rights directly. It could be used to collect useful information to try to further compromise the affected system. Workarounds for IPsec Policy Information Disclosure Vulnerability - CVE-2008-2246 Do not select the "Default Response Rule" during IPsec policy creation or uncheck this rule from existing policies as this rule is no longer valid on Windows Vista and Windows Server 2008 and is only applicable on earlier versions of Windows. To emulate this rule in Windows Vista and Windows Server 2008, refer to Microsoft Knowledge Base Article 942964. - --------------------------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 If you believe that your computer system has been compromised or attacked in any way, we encourage you to let us know by completing the secure National IT Incident Reporting Form at: http://www.auscert.org.au/render.html?it=3192 =========================================================================== 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 iQCVAwUBSKIpQSh9+71yA2DNAQKWFAP+OCW4ribMdriCZvvnX/NlqIZUEq6zjOn1 SJAQieGGh702mEMoFNelkuhbudgpPfpew/wQ9XNu6S68MsILDKlX1iL0U9kvQ6OF Y6kikGJpXMAiNJGNBT5xGQGVA/XbnmYOB/xEKJQxOJXA2OpJZPXLilaM2PZg7jLe WKlO0Bh5xto= =ZiLg -----END PGP SIGNATURE-----