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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2008.0358 -- [Win] MS08-020 Vulnerability in DNS Client Could Allow Spoofing 9 April 2008 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: DNS Client Publisher: Microsoft Operating System: Windows Vista Windows Vista x64 Windows Server 2003 SP2 Windows Server 2003 SP1 Windows Server 2003 x64 SP2 Windows Server 2003 x64 Windows Server 2003 Itanium SP2 Windows Server 2003 Itanium SP1 Windows XP SP2 Windows XP Professional x64 SP2 Windows XP Professional x64 Windows 2000 SP4 Impact: Provide Misleading Information Access: Remote/Unauthenticated CVE Names: CVE-2008-0087 Original Bulletin: http://www.microsoft.com/technet/security/bulletin/ms08-020.mspx - --------------------------BEGIN INCLUDED TEXT-------------------- MS08-020 Vulnerability in DNS Client Could Allow Spoofing This security update resolves a privately reported vulnerability. This spoofing vulnerability exists in Windows DNS clients and could allow an attacker to send specially crafted responses to DNS requests, thereby spoofing or redirecting Internet traffic from legitimate locations. This is an important security update for Windows Vista and all supported editions of Microsoft Windows 2000, Windows XP, and Windows Server 2003. This security update addresses the vulnerability by increasing the randomness of DNS transaction IDs. Microsoft recommends that customers apply the update at the earliest opportunity. Affected Software o Windows Vista o Windows Vista x64 Edition o Windows Server 2003 Service Pack 2 o Windows Server 2003 Service Pack 1 o Windows Server 2003 x64 Edition Service Pack 2 o Windows Server 2003 x64 Edition o Windows Server 2003 with SP2 for Itanium-based Systems o Windows Server 2003 with SP1 for Itanium-based Systems o Windows XP Service Pack 2 o Windows XP Professional x64 Edition Service Pack 2 o Windows XP Professional x64 Edition o Microsoft Windows 2000 Service Pack 4 Non-Affected Software o Windows Server 2008 (all editions) o Windows Vista Service Pack 1 (all editions) Vulnerability Information DNS Spoofing Attack Vulnerability CVE-2008-0087 A spoofing vulnerability exists in Windows DNS clients. The vulnerability could allow an unauthenticated attacker to send malicious responses to DNS requests made by vulnerable clients, thereby spoofing or redirecting Internet traffic from legitimate locations. - --------------------------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 iQCVAwUBR/wWdSh9+71yA2DNAQJ5ugP9G1nXgUOsGsVKdnH2bo5NErpEwL+E6bD0 tMucAHSiwpva3a80j0ezE0xTLKNbf9GYp8P0Q7/R2M3qzWgCSAZo/w8fEY7p13iJ 0KzmUHAPYHERShz2f92PJ1Zrin92mJM+FF3ZdNQPPLEDCgdglXBaU9lN9IaTc+yL wCXUc+p9/iA= =Dy4l -----END PGP SIGNATURE-----