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UNIRAS Brief - 297/06 - Sun Security Bulletin: Sun Alert ID: 102282 - Security Vulnerability May Allow 'sh'



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   UNIRAS (UK Govt CERT) Briefing Notice - 297/06 dated 21.04.06  Time: 11:25 
  UNIRAS is part of NISCC (National Infrastructure Security Co-ordination Centre)
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  UNIRAS material is also available from its website at www.uniras.gov.uk and
         Information about NISCC is available from www.niscc.gov.uk
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Title
=====

Sun Security Bulletin: Sun Alert ID: 102282 - Security Vulnerability May Allow 'sh' 
Process to be Crashed Causing a Denial of Service

Detail
====== 

A security vulnerability in the Bourne shell may allow an unprivileged
local user to cause sh(1) processes to crash while creating temporary
files. This can lead to a Denial of Service (DoS) for scripts or for
users (such as 'root') that use sh(1).


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===========================================================================
             

                        ESB-2006.0273 -- [Solaris]
        Security Vulnerability May Allow 'sh' Process to be Crashed
                        Causing a Denial of Service
                               20 April 2006

===========================================================================

       

Product:           Bourne shell (sh)
Publisher:         Sun Microsystems
Operating System:  Solaris 8,9,10
Impact:            Denial of Service
Access:            Existing Account

Original Bulletin: 
http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-102282-1

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Sun(sm) Alert Notification
     * Sun Alert ID: 102282
     * Synopsis: Security Vulnerability May Allow 'sh' Process to be
       Crashed Causing a Denial of Service
     * Category: Security
     * Product: Solaris 9 Operating System, Solaris 10 Operating System,
       Solaris 8 Operating System
     * BugIDs: 6277636
     * Avoidance: Patch
     * State: Resolved
     * Date Released: 11-Apr-2006
     * Date Closed: 11-Apr-2006
     * Date Modified: 

1. Impact

   A security vulnerability in the Bourne shell may allow an unprivileged
   local user to cause sh(1) processes to crash while creating temporary
   files. This can lead to a Denial of Service (DoS) for scripts or for
   users (such as 'root') that use sh(1).

2. Contributing Factors

   This issue can occur in the following releases:

   SPARC Platform
     * Solaris 8 without patch 109324-09
     * Solaris 9 without patch 118535-03
     * Solaris 10 without patch 121004-01

   x86 Platform
     * Solaris 8 without patch 109325-09
     * Solaris 9 without patch 118536-03
     * Solaris 10 without patch 121005-01

3. Symptoms

   There are no predictable symptoms that would indicate this issue has
   been exploited to cause a shell to crash. 

4. Relief/Workaround

   There is no workaround. Please see the "Resolution" section below.

5. Resolution

   This issue is addressed in the following releases:

   SPARC Platform
     * Solaris 8 with patch 109324-09 or later
     * Solaris 9 with patch 118535-03 or later
     * Solaris 10 with patch 121004-01 or later

   x86 Platform
     * Solaris 8 with patch 109325-09 or later
     * Solaris 9 with patch 118536-03 or later
     * Solaris 10 with patch 121005-01 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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UNIRAS wishes to acknowledge the contributions of Sun for the information 
contained in this Briefing. 
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This Briefing contains the information released by the original author. Some 
of the information may have changed since it was released. If the vulnerability 
affects you, it may be prudent to retrieve the advisory from the site of the
original source to ensure that you receive the most current information concerning 
that problem.

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and has contacts with other international Incident Response Teams (IRTs) in 
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members and the community at large. 
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<End of UNIRAS Briefing>

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