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AUSCERT External Security Bulletin Redistribution
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
AusCERT Security Bulletin Summary
Publisher: Sun Microsystems
Operating System: Solaris
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Denial of Service -- Remote with User Interaction
Overwrite Arbitrary Files -- Remote with User Interaction
CVE Names: CVE-2007-4476 CVE-2007-4131
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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
Category : Security
Release Phase : Workaround
Bug Id : 6616278
Product : Solaris 9 Operating System
Solaris 10 Operating System
Date of Workaround Release : 02-Dec-2009
Two security vulnerabilities in GNU tar (see gtar(1)):
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:
* CVE-2007-4476 at:
2. Contributing Factors
These issues can occur in the following releases:
* Solaris 9
* Solaris 10 without patch 139099-03
* OpenSolaris based upon builds snv_01 through snv_115
* 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
Note 2: Solaris 8 does not include support for GNU tar utility and
therefore is not impacted by these issues.
There are no predictable symptoms that would indicate the described
issues have been exploited on a system.
Until the patches for these issues can be applied, users should avoid
using gtar(1) with archives from untrusted sources.
These issues are addressed in the following releases:
* Solaris 10 with patch 139099-03 or later
* OpenSolaris based upon builds snv_116 or later
* 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,
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AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
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NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT
YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT,
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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
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notification may only be used for the purposes contemplated by these
Copyright 2000-2009 Sun Microsystems, Inc., 4150 Network Circle, Santa
Clara, CA 95054 U.S.A. All rights reserved
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