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3COM: Security Advisory (fwd)
From: monti () MAIL NETURAL COM (Eric Monti)
Date: Thu, 14 May 1998 21:41:17 -0500


3Com® Security Advisory for CoreBuilder and SuperStack II Customers

3Com is issuing a security advisory affecting select CoreBuilder LAN
switches and
SuperStack II Switch products. This is in response to the widespread
distribution of special
logins intended for service and recovery procedures issued only by 3Com's
Service Organization under conditions of extreme emergency, such as in the
event of a
customer losing passwords.

Due to this disclosure some 3Com switching products may be vulnerable to
breaches caused by unauthorized access via special logins.

To address these issues, customers should immediately log in to their
switches via the
following usernames and passwords. They should then proceed to change the
via the appropriate Password parameter to prevent unauthorized access.

CoreBuilder 6000/2500

- username: debug password: synnet
CoreBuilder 7000

- username: tech password: tech
SuperStack II Switch 2200

- username: debug password: synnet
SuperStack II Switch 2700

- username: tech password: tech

The CoreBuilder 3500, SuperStack II Switch 3900 and 9300 also have these
mechanisms, but
the special login password is changed to match the admin level password
when the admin
level password is changed.

Customers should also immediately change the SNMP Community string from the
default to
a proprietary and confidential identifier known only to authorized network
staff. This is due to the fact that the admin password is available through
a specific
proprietary MIB variable when accessed through the read/write SNMP
community string.

This issue applies only to the CoreBuilder 2500/6000/3500 and SuperStack II

Fixed versions of software will be available from 3Com for all of these
products by
Wednesday 20th May 1998.

General administration of these systems should still be performed through
the normal
documented usernames and passwords. Other facilities found under these
special logins are
for diagnostic purposes and should only be used under specific guidance
from 3Com's
Customer Service Organization.

For more information 3Com has dedicated a hotline at 1-888-225-1733, or you
can contact
your local 3Com Customer Service location.

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