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             AUSCERT External Security Bulletin Redistribution

                               ESB-2009.1595
      Two Security Vulnerabilities in GNU tar May Lead to Files Being
  Overwritten, Execution of Arbitrary Code, or a Denial of Service (DoS)
                              4 December 2009

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           gtar
Publisher:         Sun Microsystems
Operating System:  Solaris
                   OpenSolaris
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
                   Denial of Service               -- Remote with User Interaction
                   Overwrite Arbitrary Files       -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2007-4476 CVE-2007-4131 

Reference:         ESB-2007.1053

Original Bulletin: 
   http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-273551-1

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Two Security Vulnerabilities in GNU tar (see gtar(1)) May Lead to
Files Being Overwritten, Execution of Arbitrary Code, or a Denial of
Service (DoS)
  _________________________________________________________________

Category : Security
Release Phase : Workaround
Bug Id : 6616278
Product : Solaris 9 Operating System
Solaris 10 Operating System
OpenSolaris
Date of Workaround Release : 02-Dec-2009

Two security vulnerabilities in GNU tar (see gtar(1)):

1. Impact

Two security vulnerabilities have been found in the GNU tar gtar(1)
archiving program bundled with Solaris 9, Solaris 10 and OpenSolaris.
The first issue is a directory traversal vulnerability that may allow
a local or remote unprivileged user who provides a specially crafted
archive to overwrite arbitrary files which the user executing gtar(1)
has permission to modify.
The second issue is a buffer overflow which may allow a local or
remote unprivileged user who provides a specially crafted tar archive
to execute arbitrary commands with the privileges of the user
executing gtar(1) or to cause gtar(1) to crash.  The ability to cause
a program crash is a type of Denial of Service (DoS).
Additional information regarding these issues is available at:
  * CVE-2007-4131 at:
    http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4131
  * CVE-2007-4476 at:
    http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4476

2. Contributing Factors

These issues can occur in the following releases:
SPARC Platform
  * Solaris 9
  * Solaris 10 without patch 139099-03
  * OpenSolaris based upon builds snv_01 through snv_115

x86 Platform
  * Solaris 9
  * Solaris 10 without patch 139100-03
  * OpenSolaris based upon builds snv_01 through snv_11

Note 1: OpenSolaris distributions may include additional bug fixes
above and beyond the build from which it was derived. To determine the
base build of  OpenSolaris, the following command can be used:
 $ uname -v
 snv_86

Note 2: Solaris 8 does not include support for GNU tar utility and
therefore is not impacted by these issues.

3. Symptoms

There are no predictable symptoms that would indicate the described
issues have been exploited on a system.

4. Workaround

Until the patches for these issues can be applied, users should avoid
using gtar(1) with archives from untrusted sources.

5. Resolution

These issues are addressed in the following releases:

SPARC Platform
  * Solaris 10 with patch 139099-03 or later
  * OpenSolaris based upon builds snv_116 or later

x86 Platform
  * Solaris 10 with patch 139100-03 or later
  * OpenSolaris based upon builds snv_116 or later

A final resolution is pending completion for Solaris 9.
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

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