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AUSCERT External Security Bulletin Redistribution
ESB-2003.0504 -- Sun(sm) Alert Notification
Sun Alert ID: 55301 - Solaris 8 IPv6 Enabled Systems May Panic Handling
23 July 2003
AusCERT Security Bulletin Summary
Publisher: Sun Microsystems
Operating System: Solaris 8
Impact: Denial of Service
Access Required: Remote
Comment: Original bulletin available at:
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DOCUMENT ID: 55301
SYNOPSIS: Solaris 8 IPv6 Enabled Systems May Panic Handling Certain
Sun(sm) Alert Notification
* Sun Alert ID: 55301
* Synopsis: Solaris 8 IPv6 Enabled Systems May Panic Handling
* Category: Security
* Product: Solaris
* BugIDs: 4457722
* Avoidance: Workaround
* State: Resolved
* Date Released: 21-Jul-2003
* Date Closed: 21-Jul-2003
* Date Modified:
Solaris 8 systems configured to use Internet Protocol Version 6
(ip6(7P)) may panic when processing certain IPv6 packets. A local or
remote user may be able to send IPv6 packets which would panic the
system causing a Denial of Service.
2. Contributing Factors
This issue can occur in the following releases:
* Solaris 8 without patch 108528-21
* Solaris 8 without patch 108529-21
Note: Solaris 2.6, Solaris 7 and Solaris 9 are not impacted by this
The symptom of this issue is a sytem panic.
To work around the described issue, disable IPv6 on the system.
To determine if a system is running with IPv6 enabled, run the
$ ifconfig -a6
If entries are printed marked "UP and RUNNING" then the system is
To disable IPv6 on a system, run the following command as root:
# ifconfig -a6 down
Edit the "/etc/nsswitch.conf" file and change the ipnodes entry to be
"files" only. IPv6 will function again after a reboot.
Note: To disable IPv6 on systems across a system reboot, the
"/etc/hostname6.<interface>" files can be temporarily renamed.
This issue is addressed in the following releases:
* Solaris 8 with patch 108528-21 or later
* Solaris 8 with patch 108529-21 or later
This Sun Alert notification is being provided to you on an "AS IS"
basis. This Sun Alert notification may contain information provided by
third parties. The issues described in this Sun Alert notification may
or may not impact your system(s). Sun makes no representations,
warranties, or guarantees as to the information contained herein. ANY
AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT
YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE
OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN.
This Sun Alert notification contains Sun proprietary and confidential
information. It is being provided to you pursuant to the provisions of
your agreement to purchase services from Sun, or, if you do not have
notification may only be used for the purposes contemplated by these
Copyright 2000-2003 Sun Microsystems, Inc., 4150 Network Circle, Santa
Clara, CA 95054 U.S.A. All rights reserved.
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