Bug Id
6762012

Product
OpenSolaris

Date of Resolved Release
21-Jan-2009

A Solaris Kernel Security Vulnerability on Systems Using the Sun UltraSPARC T2 and T2+ Processors May Allow Denial of Service (DoS)

1. Impact

A security vulnerability in the sun4v kernel for Sun UltraSPARC T2 and UltraSPARC T2+ systems may allow a local unprivileged user to panic the system, which is a type of Denial of Service (DoS).

2. Contributing Factors

This issue can occur in the following releases: 

SPARC Platform

• OpenSolaris based upon builds snv_100 through snv_102

for Sun UltraSPARC T2 and UltraSPARC T2+ systems.

Notes:

1. Solaris 8 and 9 do not support the Sun UltraSPARC T2 or UltraSPARC T2+ processor and thus are not impacted by this issue.

2. Solaris 10 is not impacted by this issue.

3. This issue only affects systems with a Sun UltraSPARC T2 or UltraSPARC T2+ processor and therefore does not affect the x86 platform.

To determine if a system has either a Sun UltraSPARC T2 or UltraSPARC T2+ processor, the following command can be run:

$ modinfo | grep SUNW,UltraSPARC-T2

If output is returned similiar to the following:

3  12c3d40   5450   -   0  SUNW,UltraSPARC-T2 ()

or:

4  121c460   6520   -   0  SUNW,UltraSPARC-T2+ ()

then the system has a Sun UltraSPARC T2 or UltraSPARC T2+ processor.

3. Symptoms

If the described issue occurs, the system may panic with a stack trace similar to the following:

panic[cpu16]/thread=30005406e80: bad stack overflow at TL 1

hat_memload_array_region()
segvn_fault_vnodepages()
segvn_fault()
as_fault()
pagefault()
trap()
utl0()

4. Workaround

There is no workaround for this issue. Please see the Resolution section below.

5. Resolution

This issue is addressed in the following release:

SPARC Platform

• OpenSolaris based upon builds snv_103 or later

For more information on Security Sun Alerts, see 1009886.1.

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 2000-2009 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, CA 95054 U.S.A. All rights reserved.





24-Mar-2009:
This security issue was caused by the putback for 6368478.











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