Apani Network Response to ISAKMP cert-fi:7710 Alert
APANI Networks EpiForce 1.9 and Earlier Potential Denial of Service in EpiForce
Agent
NOTICE: The information in this notice should be acted upon as soon as
possible. All affected customers have already been contacted by Apani.
Release Date: 2005-12-09
Potential Security Impact: Remote Denial of Service
Source: Apani Networks Corporation
Apani Product Support
VULNERABILITY SUMMARY
A potential denial of service vulnerability has been identified with in the
EpiForce Agent. Agents automatically restart if a failure is detected.
References: cert-fi:7710, NISCC 273756, CVE-2005-3670, CERT VU#226364
IMPACTED VERSIONS:
EpiForce Agent 1.9 and earlier versions
BACKGROUND:
The Department of Electrical and Information Engineering at the University of
Oulu in Finland began the PROTOS project in 1999. Its purpose is to "research
different approaches of testing implementations of protocols using black-box
(i.e. functional) testing methods." Black box testing means that the tester
does not have any knowledge of the internal workings of the specific
implementation of the protocol being tested.
Over time, PROTOS developed test suites for a variety of protocols. On 14
November 2005, the PROTOS project announced the availability of a test suite
for the Internet Security Association and Key Management Protocol (ISAKMP).
ISAKMP is a part of the Internet Key Exchange (IKE) protocol, which is used to
negotiate IPSec security associations between Apani EpiForce Agents. It is also
used for the same purpose in many VPN products from other companies.
The PROTOS test suite for ISAKMP contains 5000 separate tests. Apani noted that
a few tests could crash the IKE Negotiation Module (INM) in the EpiForce Agent.
Agents automatically restart INM if a failure is detected.
NOTE: Customers should be aware that EpiForce Agents do not use aggressive mode
negotiations, which was mentioned in the PROTOS announcement. In addition,
EpiForce Agents do not use preshared keys. The PROTOS tests are based on
preshared keys. EpiForce Agents ignore or quickly drop all of the negotiation
test messages that originate from the PROTOS ISAKMP test suite.
AFFECTED VERSIONS
EpiForce Version 1.9 and Earlier
MITIGATION
Upgrade to Version 2.0
RESOLUTION
Apani Networks is currently working with our customers in regards to older
versions of the product.
UPDATE HISTORY
Initial release: 1
Support: For further information, contact your Apani Networks support channel
or via the web:
http://www.apani.com/support/contact-support
Report: To report a potential security vulnerability with an Apani Networks
product, contact Apani Networks at support@xxxxxxxxxx
(c)Copyright 2005 Apani Networks