-----BEGIN PGP SIGNED MESSAGE-----
AUSCERT External Security Bulletin Redistribution
ESB-2005.0040 -- iDEFENSE Security Advisory 01.13.05
SGI IRIX inpview Design Error Vulnerability
14 January 2005
AusCERT Security Bulletin Summary
Operating System: IRIX
Impact: Root Compromise
Access: Existing Account
Original Bulletin: http://www.idefense.com/application/poi/display?id=182
- --------------------------BEGIN INCLUDED TEXT--------------------
SGI IRIX inpview Design Error Vulnerability
iDEFENSE Security Advisory 01.13.05
January 13, 2005
The inpview program is a setuid root application that is included in the
InPerson networked multimedia conferencing tool. InPerson networked
multimedia conferencing tool is included in SGI IRIX.
Local exploitation of a design error vulnerability in the inpview
command included in multiple versions of Silicon Graphics Inc.'s IRIX
could allow for arbitrary code execution as the root user.
The vulnerability specifically exists due to the fact that inpview
trusts the user environment and does not drop privileges. When the
environment variable SUN_TTSESSION_CMD is something such as "cp /bin/jsh
/tmp/jsh;chmod 6755 /tmp/jsh;killall -9 inpview," the chain of commands
will be executed with root permissions, thus allowing a regular user to
drop a setuid and setgid shell to /tmp.
All that is required to exploit this vulnerability is a local account
and an open X display, which could be the attacker's home machine or
another compromised system. Exploitation does not require any knowledge
of application internals, making privilege escalation trivial, even for
iDEFENSE has confirmed the existence of this vulnerability in SGI IRIX
version 6.5.9 (feature) and 6.5.22 (maintenance). It is suspected that
previous and later versions of both the feature and maintenance
revisions of IRIX 6.5 are also vulnerable.
Only allow trusted users local access to security critical systems.
Alternately, remove the setuid bit from inpview:
chmod u-s /usr/lib/InPerson/inpview
VI. VENDOR RESPONSE
Support for the InPerson product did not extend beyond 02/2002 as noted
in the following publication:
As a result, no patch will be issued for this vulnerability.
VII. CVE INFORMATION
A Mitre Corp. Common Vulnerabilities and Exposures (CVE) number has not
been assigned yet.
VIII. DISCLOSURE TIMELINE
01/06/2005 Initial vendor notification
01/07/2005 Initial vendor response
01/13/2005 Public disclosure
iDEFENSE Labs is credited with this discovery.
Get paid for vulnerability research
X. LEGAL NOTICES
Copyright (c) 2004 iDEFENSE, Inc.
Permission is granted for the redistribution of this alert
electronically. It may not be edited in any way without the express
written consent of iDEFENSE. If you wish to reprint the whole or any
part of this alert in any other medium other than electronically, please
email firstname.lastname@example.org for permission.
Disclaimer: The information in the advisory is believed to be accurate
at the time of publishing based on currently available information. Use
of the information constitutes acceptance for use in an AS IS condition.
There are no warranties with regard to this information. Neither the
author nor the publisher accepts any liability for any direct, indirect,
or consequential loss or damage arising from use of, or reliance on,
- --------------------------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 email@example.com
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: firstname.lastname@example.org
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-----