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AUSCERT External Security Bulletin Redistribution
ESB-2006.0723 -- [Solaris]
Vulnerability With Solaris IPv6 May Allow a Remote User the
Ability to Create a Denial of Service Condition
2 October 2006
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AusCERT Security Bulletin Summary
---------------------------------
Product: IPv6
Publisher: Sun Microsystems
Operating System: Solaris 10
Solaris 9
Solaris 8
Impact: Denial of Service
Access: Remote/Unauthenticated
Ref: ESB-2006.0705
Original Bulletin:
http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-102144-1
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Sun(sm) Alert Notification
* Sun Alert ID: 102144
* Synopsis: Vulnerability With Solaris IPv6 May Allow a Remote User
the Ability to Create a Denial of Service Condition
* Category: Security
* Product: Solaris 9 Operating System, Solaris 10 Operating System,
Solaris 8 Operating System
* BugIDs: 6241739
* Avoidance: Patch
* State: Resolved
* Date Released: 28-Sep-2006
* Date Closed: 28-Sep-2006
* Date Modified:
1. Impact
On Solaris 8, 9 and 10 systems utilizing an IPv6 address, a remote
unprivileged user may be able to panic the system, causing a Denial of
Service (DoS) condition.
2. Contributing Factors
This issue can occur in the following releases:
SPARC Platform
* Solaris 8 without patch 116965-22
* Solaris 9 without patch 114344-20
* Solaris 10 without patch 119075-13
x86 Platform
* Solaris 8 without patch 116966-21
* Solaris 9 without patch 119435-10
* Solaris 10 without patch 119076-11
Solaris systems are only impacted by this issue if they have an IPv6
address configured. If an IPv6 address is configured, the ifconfig(1M)
command will show an output line which contains the word "IPv6" as in
the following example:
# /usr/sbin/ifconfig -a | /usr/bin/grep IPv6
eri0: flags=2000840<RUNNING,MULTICAST,IPv6> mtu 1500 index 2
3. Symptoms
The system may panic with a stack trace similar to the following:
...
msgdsize+0x54()
ip_rput_frag_v6+0x9d4()
ip_rput_data_v6+0x1254()
putnext+0x450()
...
4. Relief/Workaround
There is no workaround if the system under consideration is using the
IPv6 address for network communications. If an IPv6 address is enabled
but not being used, then disabling the IPv6 address will prevent this
issue from occurring on the system.
To disable the IPv6 address, use the ifconfig(1M) command. For
example, If "eri0" is the network interface, then the following
command will disable the IPv6 address:
# /usr/sbin/ifconfig eri0 inet6 unplumb
5. Resolution
This issue is addressed in the following releases:
SPARC Platform
* Solaris 8 with patch 116965-22 or later
* Solaris 9 with patch 114344-20 or later
* Solaris 10 with patch 119075-13 or later
x86 Platform
* Solaris 8 with patch 116966-21 or later
* Solaris 9 with patch 119435-10 or later
* Solaris 10 with patch 119076-11 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
such an agreement, the Sun.com Terms of Use. This Sun Alert
notification may only be used for the purposes contemplated by these
agreements.
Copyright 2000-2006 Sun Microsystems, Inc., 4150 Network Circle, Santa
Clara, CA 95054 U.S.A. All rights reserved
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