Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2008.0349 -- [Solaris]
Security Vulnerability in inetd(1M) Daemon When Debug Logging is Enabled
4 April 2008
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: inetd
Publisher: Sun Microsystems
Operating System: Solaris 10
Impact: Denial of Service
Access: Existing Account
Original Bulletin:
http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-233284-1
- --------------------------BEGIN INCLUDED TEXT--------------------
Solution Type: Sun Alert
Solution 233284: Security Vulnerability in inetd(1M) Daemon When
Debug Logging is Enabled
Bug ID: 6657786
Product: Solaris 10 Operating System
Date of Resolved Release: 02-Apr-2008
Security Vulnerability in inetd(1M) Daemon When Debug Logging is Enabled
1. Impact
The inetd(1M) daemon will log debug messages to the log file
/var/tmp/inetd.log if this file exists. A local unprivileged user may
be able to create a link from this log file to another file on the
system, allowing the user to modify that file. This could result in a
Denial of Service (DoS).
2. Contributing Factors
This issue can occur in the following releases:
SPARC Platform
* Solaris 10 without patch 127718-05
x86 Platform
* Solaris 10 without patch 127719-05
Note: Solaris 8 and 9 are not impacted by this issue
To determine if inetd(1M) is logging messages to a file, the following
command can be run:
$ ls /var/tmp/inetd.log
The presence of the inetd.log file indicates inetd(1M) is logging
messages.
3. Symptoms
There are no predictable symptoms that would indicate the described
issue has been exploited.
4. Workaround
To prevent this issue from being exploited to modify any file on the
system, the root user (uid 0) can create the debug log file
"/var/tmp/inetd.log". If a root owned /var/tmp/inetd.log file exists,
a local unprivileged user will not be able to create a link from the
inetd debug log to another file. For example:
# /usr/bin/rm /var/tmp/inetd.log
# /usr/bin/touch /var/tmp/inetd.log
# /usr/bin/ls -l /var/tmp/inetd.log
-rw-r--r-- 1 root root 0 Feb 13 14:42 /var/tmp/inetd.log
5. Resolution
This issue is addressed in the following releases:
SPARC Platform
* Solaris 10 with patch 127718-05 or later
x86 Platform
* Solaris 10 with patch 127719-05 or later
For more information on Security Sun Alerts, see Sun Infodoc 91209.
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
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
http://www.auscert.org.au/render.html?cid=1980
If you believe that your computer system has been compromised or attacked in
any way, we encourage you to let us know by completing the secure National IT
Incident Reporting Form at:
http://www.auscert.org.au/render.html?it=3192
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
iQCVAwUBR/WDMih9+71yA2DNAQIdxgP+Kbr3Crx7glJUVjXwiaO0ldITc/bv2IQx
9u6dWYIr6QrmAR1YuTGf1XFU6IbvBPMBqUry+v9Ks3fwB9fJuF69Fyc4mVml6pmv
5YdVU2fcZCID1ROD64hBANmGwJoiQ/BhBFW4nBHky/fVfU4cSsjQwItIrj3Odflm
Mtr5HlsUywA=
=1bAK
-----END PGP SIGNATURE-----