-----BEGIN PGP SIGNED MESSAGE-----
AUSCERT External Security Bulletin Redistribution
ESB-2006.0241 -- [Solaris]
Security Vulnerability With The "/usr/ucb/ps" Command
29 March 2006
AusCERT Security Bulletin Summary
Publisher: Sun Microsystems
Operating System: Solaris 9
Impact: Read-only Data Access
Access: Existing Account
- --------------------------BEGIN INCLUDED TEXT--------------------
Sun(sm) Alert Notification
* Sun Alert ID: 102215
* Synopsis: Security Vulnerability With The "/usr/ucb/ps" Command
* Category: Security
* Product: Solaris 9 Operating System, Solaris 8 Operating System
* BugIDs: 4798073
* Avoidance: Patch, Workaround
* State: Resolved
* Date Released: 27-Mar-2006
* Date Closed: 27-Mar-2006
* Date Modified:
A security vulnerability in the "/usr/ucb/ps" (see ps(1B)) command may
allow unprivileged local users the ability to see environment
variables and their values for processes which belong to other users.
2. Contributing Factors
This issue can occur in the following releases:
* Solaris 8 without patch 109023-05
* Solaris 9 without patch 120240-01
* Solaris 8 without patch 109024-05
* Solaris 9 without patch 120239-01
Note 1: Solaris 10 is not affected by this issue.
Note 2: The ps(1m) command is used for reporting process status. The
full path for this command is "/usr/bin/ps". In addition, there is
"/usr/ucb/ps" which is documented in the ps(1b) manual page. Only the
"/usr/ucb/ps" command is affected by the vulnerability described in
this Sun Alert.
In general users will use the "/usr/bin/ps" version as most will not
have the directory "/usr/ucb" in their command search path (see the
appropriate PATH section of relevant shell manual pages).
As an unprivileged user, running the "/usr/ucb/ps axe" command shows
all processes, and with the "e" flags, it also includes their
$ /usr/ucb/ps axe
PID TT S TIME COMMAND
53 ? S 0:00 /usr/lib/devfsadm/devfseventd LD_LIBRARY_PATH= PATH=/sb
/usr/sbin:/usr/bin TZ=GB-Eire _INIT_PREV_LEVEL=0
In the example above we can see a root owned daemon, along with its
environment variables and their values.
To work around the described issue, remove the set-id bit from
This issue is addressed in the following releases:
* Solaris 8 with patch 109023-05 or later
* Solaris 9 with patch 120240-01 or later
* Solaris 8 with patch 109024-05 or later
* Solaris 9 with patch 120239-01 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
notification may only be used for the purposes contemplated by these
Copyright 2000-2006 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 firstname.lastname@example.org
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:
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:
Australian Computer Emergency Response Team
The University of Queensland
Internet Email: email@example.com
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-----
-----END PGP SIGNATURE-----