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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2005.0626 -- Microsoft Security Bulletin MS05-042 Vulnerabilities in Kerberos Could Allow Denial of Service, Information Disclosure, and Spoofing (899587) 10 August 2005 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Kerberos Publisher: Microsoft Operating System: Windows Server 2003 Windows XP Windows 2000 Impact: Access Confidential Data Denial of Service Provide Misleading Information Access: Remote/Unauthenticated CVE Names: CAN-2005-1982 CAN-2005-1981 Original Bulletin: http://www.microsoft.com/technet/security/Bulletin/MS05-042.mspx - --------------------------BEGIN INCLUDED TEXT-------------------- MS05-042 - Vulnerabilities in Kerberos Could Allow Denial of Service, Information Disclosure, and Spoofing (899587) - Affected Software: - Windows 2000 Service Pack 4 - Windows XP Service Pack 1 - Windows XP Service Pack 2 - Windows XP Professional x64 Edition - Windows Server 2003 - Windows Server 2003 Service Pack 1 - Windows Server 2003 for Itanium-based Systems - Windows Server 2003 with SP1 for Itanium-based Systems - Windows Server 2003 x64 Edition - Impact: Remote Code Execution - Version Number: 1.0 Vulnerability Details Kerberos Vulnerability - CAN-2005-1981: A denial of service vulnerability exists that could allow an attacker to send a specially crafted message to a Windows domain controller that could cause the service that is responsible for authenticating users in an Active Directory domain to stop responding. PKINIT Vulnerability - CAN-2005-1982: This is an information disclosure and spoofing vulnerability. This vulnerability could allow an attacker to tamper with certain information that is sent from a domain controller and potentially access sensitive client network communication. Users could believe they are accessing a trusted server when in reality they are accessing a malicious server. However, an attacker would first have to inject themselves into the middle of an authentication session between a client and a domain controller. - --------------------------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 iQCVAwUBQvmk/yh9+71yA2DNAQKaAwQAnH9AQzEdlDtPy+6skZ8+DwkQJ78AVdtS HUK+fNtF5c6AdYZa1fiJVV2XkzJ+fkch30tyEBXN8CV1+WA85DGvZhzsnbMmNRai z9WB8BDlAkdBOuLSd+vKgZZtd9xEnlbZ5WJ/DIRUotSEp2HuaAA662hwn4q6sWtz 3B62ntm4IT8= =D+Jf -----END PGP SIGNATURE-----