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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2004.0536 -- US-CERT Vulnerability Note VU#432097 Novell Bordermanager VPN Service Denial of Service Vulnerability 26 August 2004 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Novell BorderManager 3.8 SP1 and prior Publisher: US-CERT Operating System: Novell Netware Impact: Denial of Service Access: Remote/Unauthenticated - --------------------------BEGIN INCLUDED TEXT-------------------- US-CERT Vulnerability Note VU#432097 Novell Bordermanager VPN Service denial-of-service vulnerability Overview A vulnerability exists in the Novell Bordermanager VPN service that could allow a remote attacker to cause a denial of service. I. Description The Novell Bordermanager product includes Virtual Private Network (VPN) capabilities, including support for the standard Internet Key Exchange (IKE) protocol. A flaw exists in the way the VPN service handles certain malformed IKE packets. This flaw creates a remotely exploitable denial of service vulnerability that could cause an affected device to crash. The specific nature of the IKE packet malformation exploiting the vulnerability is unknown. II. Impact A remote attacker with the ability to craft malformed IKE packets could cause an "abnormal ending" (abend) in the IKE.NLM module. This condition creates a denial of service on the server and causes clients previously connected to the server to hang. III. Solution A patch fixing this vulnerability is available from Novell at the following URL: http://support.novell.com/cgi-bin/search/searchtid.cgi?/10093576.htm Credit This bulletin is an edited version of US-CERT Vulnerability Note VU#432097, written by Chad R Dougherty. Thanks to the Novell product security team for reporting this vulnerability. This vulnerability was discovered using the Striker test suite from Rapid7. - --------------------------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 email@example.com 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: firstname.lastname@example.org 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 iQCVAwUBQS16Kyh9+71yA2DNAQJejwQAhPJV5NLkOnER8ogrinB2eDPlKaGsrdb3 LFHiv5WkYSHnjbH4y+vyUJFSyqvg6VCtjyvPjo1mDpfpf6pyWm7x07Neen2Wi6vU trAwM3VTlgih7CSRNhI5HexEEhpJxNjCG0YfGhvi0vPMzhF5V4e9qKArp4G9hkhS RDdv7pKPGts= =BYVp -----END PGP SIGNATURE-----