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AUSCERT External Security Bulletin Redistribution
ESB-2008.0569 -- [Solaris]
A Security Vulnerability in the Solaris crontab(1) utility
may allow execution of Arbitrary Code
11 August 2008
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AusCERT Security Bulletin Summary
---------------------------------
Product: crontab
Publisher: Sun Microsystems
Operating System: Solaris
Impact: Execute Arbitrary Code/Commands
Increased Privileges
Access: Remote/Unauthenticated
CVE Names: CVE-2008-2538
Original Bulletin:
http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-237864-1
Revision History: August 11 2008: Updated Patches
June 6 2008: Added CVE Reference
June 2 2008: Initial Release
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Solution Type: Sun Alert
Solution 237864 : A Security Vulnerability in the Solaris
crontab(1) utility may allow execution of Arbitrary Code
Bug ID: 6620661
Product
Solaris 8 Operating System,
Solaris 9 Operating System,
Solaris 10 Operating System
Date of Resolved Release: 30-May-2008
SA Document Body
A Security Vulnerability in the Solaris crontab(1) utility may allow
execution of Arbitrary Code
1. Impact
A race condition security vulnerability in the Solaris crontab(1)
utility may allow a local unprivileged user to inject arbitrary
cron(1M) jobs into another local user's crontab file, leading to
execution of arbitrary code with the privileges of that user. This
condition may also be exploited to inject arbitrary entries into the
root user's crontab file under certain circumstances, thereby allowing
the local unprivileged user to execute arbitrary code with the
privileges of the root user.
Sun acknowledges with thanks, Charles Morris of Old Dominion
University for discovering and reporting this issue.
2. Contributing Factors
This issue can occur in the following releases:
SPARC Platform
* Solaris 8 without patch 109007-26
* Solaris 9 without patch 122300-27
* Solaris 10 without patch 137017-02
* OpenSolaris based upon builds snv_01 through snv_91
x86 Platform
* Solaris 8 without patch 109008-26
* Solaris 9 without patch 122301-27
* Solaris 10 without patch 137018-02
* OpenSolaris based upon builds snv_01 through snv_91
Only OpenSolaris installations including the following affected
binaries are impacted by this issue:
/usr/bin/crontab
/usr/xpg4/bin/crontab
/usr/xpg6/bin/crontab
OpenSolaris distributions may include additional bug fixes above and
beyond the base build from which it was derived. The base build can be
derived as follows:
$ uname -a
SunOS phys-node-1 5.11 snv_86 i86pc i386 i86pc
3. Symptoms
There are no predictable symptoms that would indicate the described
issue has been exploited to execute arbitrary code.
4. Workaround
There is no workaround for this issue. Please see the Resolution
section below.
5. Resolution
SPARC Platform
* Solaris 8 with patch 109007-26 or later
* Solaris 9 with patch 122300-27 or later
* Solaris 10 with patch 137017-02 or later
* OpenSolaris based upon builds snv_92 or later
x86 Platform
* Solaris 8 with patch 109008-26 or later
* Solaris 9 with patch 122301-27 or later
* Solaris 10 with patch 137018-02 or later
* OpenSolaris based upon builds snv_92 or later
For more information on Security Sun Alerts, see Technical
Instruction ID 213557.
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 2000-2008 Sun Microsystems, Inc., 4150 Network Circle, Santa
Clara, CA 95054 U.S.A. All rights reserved
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