Multiple Cisco VPN 3000 Vulnerabilities

Risk
High

Date Discovered
09-03-2002

Description
Cisco has reported a number of vulnerabilities in the VPN 3000 series concentrators. These issues affect models 3005, 3015, 3030, 3060, 3080 and the Cisco VPN 3002 Hardware Client.

The nature of these issues varies from disclosure of sensitive information, to denial of service. Some of these issues may allow for remote unauthorized access to the device or the network to occur.

Components Affected
Cisco VPN 3000 Concentrator 2.5.2 (F)
Cisco VPN 3000 Concentrator 2.5.2 (D)
Cisco VPN 3000 Concentrator 2.5.2 (C)
Cisco VPN 3000 Concentrator 2.5.2 (B)
Cisco VPN 3000 Concentrator 2.5.2 (A)
Cisco VPN 3000 Concentrator 3.0.3 (A)
Cisco VPN 3000 Concentrator 3.1.1
Cisco VPN 3000 Concentrator 3.5 (Rel)
Cisco VPN 3000 Concentrator 3.5.3
Cisco VPN 3000 Concentrator 3.5.4
Cisco VPN 3000 Concentrator 3.6 (Rel)
Cisco VPN 3002 Hardware Client

Recommendations
Block external access at the network boundary, unless service is required by external parties.
Filter untrusted network traffic at border routers and network firewalls.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Use network intrusion detection systems to identify attempted attacks and their origins.

Cisco has made patches available on the basis of specific issues. Please see the referenced advisory for information regarding fixes for your specific platform:

Cisco VPN 3000 Concentrator 2.5.2 (F)
Cisco VPN 3000 Concentrator 2.5.2 (D)
Cisco VPN 3000 Concentrator 2.5.2 (C)
Cisco VPN 3000 Concentrator 2.5.2 (B)
Cisco VPN 3000 Concentrator 2.5.2 (A)
Cisco VPN 3000 Concentrator 3.0.3 (A)
Cisco VPN 3000 Concentrator 3.1.1
Cisco VPN 3000 Concentrator 3.5 (Rel)
Cisco VPN 3000 Concentrator 3.5.3
Cisco VPN 3000 Concentrator 3.5.4
Cisco VPN 3000 Concentrator 3.6 (Rel)
Cisco VPN 3002 Hardware Client

References
Source: Cisco 20020903 Cisco VPN 3000 Concentrator Multiple Vulnerabilities
URL: http://online.securityfocus.com/advisories/4446

Credits
Vulnerability announced in a Cisco Security Advisory.

Copyright (c) 2002 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 symsecurity@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.

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