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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2005.0937 -- SYM05-025 Symantec Dynamic VPN Services: ISAKMP Denial of Service 23 November 2005 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Symantec Enterprise Firewall 8.0 Symantec Gateway Security 5000 Series Symantec Firewall / VPN Appliance 100, 200 and 200R Symantec Gateway Security 300 and 400 Publisher: Symantec Operating System: Windows Solaris Network appliances Impact: Denial of Service Access: Remote/Unauthenticated Ref: AL-2005.0039 Original Bulletin: http://securityresponse.symantec.com/avcenter/security/Content/2005.11.21.html - --------------------------BEGIN INCLUDED TEXT-------------------- SYM05-025 November 21, 2005 Symantec Dynamic VPN Services: ISAKMP Denial of Service Revision History None Severity Medium Remote Access Yes Local Access No Authentication Required No Exploit publicly available No Overview The NISCC (National Infrastructure Security Co-ordination Centre) a UK-sponsored inter-departmental agency has identified nearly five-thousand potential ISAKMP vulnerabilities. Test for these vulnerabilities were created by the NISCC and distributed to an unspecified number of vendors including Symantec. While proactively testing our products against these vulnerabilities, Symantec uncovered a buffer overflow in two out of the five-thousand tests that can lead to a denial of service of the dynamic VPN services. Affected Product(s) Product Model/Platform Version Solution Symantec Enterprise Firewall Windows 8.0 SEF8.0-20051114-00 Solaris 8.0 SEF8.0-20051114-00 Symantec Gateway Security 5000 Series 3.0 SGS3.0-2005114-02 5400 2.0.1 SGS2.0.1-20051114-00 5310 1.0 SG7004-20051114-00 5200/5300 1.0 SG7004-20051114-00 5100 SG7004-20051114-00 Symantec Firewall /VPN Appliance 200/200R All Build 1.8F 100 All Build 1.8F Symantec Gateway Security 400 2.0 Build 1103 300 2.0 Build 1103 Not Affected Product(s) Product Model Version Symantec Clientless VPN Gateway 4400 5.0 Details Association and Key Management Protocol), a standard protocol that provides the framework for establishing, negotiating, modifying, and deleting security associations. The ISAKMP service listens on UDP port 500 on all the affected security gateways. Under certain conditions a malformed ISAKMP packet can potentially cause the ISAKMP service to crash therefore affecting the ability and stability of dynamic VPN tunnels. Symantec Response Symantec engineers created patches to correct this issue. The patches listed above are available via the Symantec Enterprise Support site: http://www.symantec.com/techsupp/enterprise/select_product_updates.html Symantec is not aware of any active attempts against or customers impacted by this issue. M As a part of normal best practices, users should keep vendor-supplied patches for all application software and operating systems up-to-date. Symantec strongly recommends any affected customers update their product immediately to protect against these types of threats. Symantec takes the security and proper functionality of its products very seriously. As founding members of the Organization for Internet Safety (OISafety), Symantec follows the principles of responsible disclosure. Symantec also subscribes to the vulnerability guidelines outlined by the National Infrastructure Advisory Council (NIAC). Please contact secure@symantec.com if you feel you have discovered a potential or actual security issue with a Symantec product. A Symantec Product Security team member will contact you regarding your submission. Symantec has developed a Product Vulnerability Handling Process document outlining the process we follow in addressing suspected vulnerabilities in our products. We support responsible disclosure of all vulnerability information in a timely manner to protect Symantec customers and the security of the Internet as a result of vulnerability. This document is available from the location provided below. Symantec strongly recommends using encrypted email for reporting vulnerability information to secure@symantec.com. The Symantec Product Security PGP key can be obtained from the location provided below. Symantec-Product-Vulnerability-Response Symantec Vulnerability Response Policy Symantec Product Vulnerability Management PGP Key Symantec Product Vulnerability Management PGP Key Copyright (c) 2005 by Symantec Corp. Permission to redistribute this alert electronically is granted as long as it is not edited in any way unless authorized by Symantec Security Response. Reprinting the whole or part of this alert in any medium other than electronically requires permission from secure@symantec.com. Disclaimer The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information. Symantec, Symantec products, Symantec Security Response, and SymSecurity are registered trademarks of Symantec Corp. and/or affiliated companies in the United States and other countries. All other registered and unregistered trademarks represented in this document are the sole property of their respective companies/owners. - --------------------------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 iQCVAwUBQ4PFpCh9+71yA2DNAQL7OgQAmPfkZ+xWOxnhkdAkOJxXQ186a8JxxXHk HmKxJWwojurDar9a8FH/vh3w9YrhZhynoKUE+IfoyJ//fUO/bkCSQAFR4llKBb9g RfZRa1XR01CCzL6dl0dh0krIIBFYGy6uhAJH9TZ0jXEFnc7liT5FzVt+we1WBzrd GquQXVTn/Fw= =7csT -----END PGP SIGNATURE-----