Bug Id
6673119

Product
Solaris 10 Operating System
OpenSolaris

Date of Resolved Release
11-Jun-2008

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

1. Impact

A security vulnerability in the processor specific kernel module 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

• Solaris 10 without patch 137111-01           
• OpenSolaris based upon builds snv_64 through snv_92

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. 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 such as:

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

or:

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

   
is seen, 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 strace similar to the following:

panicsys()
vpanic()
panic()
die(0 
trap()
ktl0()
kcopy_nta() 
uiomove()
writerp()
nfs3_write()
vnext_write()
port_fop_write()
vhead_write() 
fop_write()
vn_rdwr()
core_write()        
elf32core() 
do_core()
core()     
psig()
post_syscall()
syscall_trap32()

4. Workaround

To prevent this issue from occurring until patches can be applied, the system-wide core file options can be modified to disable core dumps using coreadm(1M) as in the following example:

# coreadm -d process -d global -d global-setid -d proc-setid

5. Resolution

This issue is addressed in the following releases:

SPARC Platform

• Solaris 10 with patch 137111-01 or later
• OpenSolaris based upon builds snv_93 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.

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References

137111-01





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