Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2008.0497 -- [Win]
Microsoft Windows I2O Filter Utility Driver (i2omgmt.sys)
Local Privilege Escalation Vulnerability
13 May 2008
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Intelligent Input/Output (I2O)
Publisher: iDEFENSE
Operating System: Windows
Impact: Administrator Compromise
Access: Existing Account
CVE Names: CVE-2008-0322
Original Bulletin:
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=699
- --------------------------BEGIN INCLUDED TEXT--------------------
iDefense Security Advisory 05.12.08
http://labs.idefense.com/intelligence/vulnerabilities/
May 12, 2008
I. BACKGROUND
Intelligent Input/Output (I2O) is a defunct computer input/output (I/O)
specification. i2omgmt.sys is a Windows driver for the I2O Utility
Filter. For more background information about I2O, see following
website.
http://en.wikipedia.org/wiki/I2O
II. DESCRIPTION
Local exploitation of an input validation vulnerability within version
5.1.2600.2180 of i2omgmt.sys, as included with Microsoft Corp's Windows
XP operating system, could allow an attacker to execute arbitrary code
in the context of the kernel.
This vulnerability specifically exists due to insecure permissions on
the \\.\I2OExc device interface. The permissions on this device allow
"Everyone" write access. This could allow a locally logged-in user to
access functionality designed for privileged use only.
Additionally, the IOCTL handlers for this device interface do not
properly validate user-mode buffer passed to them, so an attacker can
supply a fake DeviceObject pointer to a user-mode address. As such, it
is possible to overwrite arbitrary memory or execute attacker-supplied
code in the context of the kernel.
III. ANALYSIS
Exploitation allows an attacker to elevate privileges by overwriting
arbitrary system memory or executing code within kernel context. An
attacker needs to log-in to the target machine to exploit this
vulnerability.
This driver is related to I2O protocol and RAID devices. It is not
present by default on every Windows installation. However, iDefense
found this driver loaded on several systems we tested.
IV. DETECTION
iDefense has confirmed the existence of this vulnerability in
i2omgmt.sys version 5.1.2600.2180 as installed on some Windows XP SP2
systems. All other Windows releases with this driver, including
previous versions, are suspected to be vulnerable.
V. WORKAROUND
Removing write permissions for "Everyone" appears to prevent access to
the vulnerable code. Although no side effects were witnessed in lab
tests, normal functionality may be hindered.
VI. VENDOR RESPONSE
Microsoft has addressed this issue within Windows XP Service Pack 3. To
obtain Microsoft XP Service Pack 3, visit the following URL.
http://www.microsoft.com/downloads/details.aspx?FamilyID=5b33b5a8-5e76-401f-be08-1e1555d4f3d4
VII. CVE INFORMATION
The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2008-0322 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org/), which standardizes names for
security problems.
VIII. DISCLOSURE TIMELINE
03/20/2007 Initial vendor notification
03/20/2007 Initial vendor response
05/12/2008 Coordinated public disclosure
IX. CREDIT
This vulnerability was reported to iDefense by Rubén Santamarta of
reversemode.com.
Get paid for vulnerability research
http://labs.idefense.com/methodology/vulnerability/vcp.php
Free tools, research and upcoming events
http://labs.idefense.com/
X. LEGAL NOTICES
Copyright © 2008 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 e-mail customerservice@idefense.com 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, this information.
- --------------------------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
iQCVAwUBSCjy1yh9+71yA2DNAQIfyQP+OhN/qzAaIH1y29Ra+K6nv0QYXrk2D+Wp
CurLrBgJjqq1cf/yXs1/Uca43BRKH252uKQfJN+6bLFfgB4zdlSX55Ja3J6/AUXF
+eCGtbfSb3NXx5pX41mzUcL2AYxUdRvwv2FA9HGwfbti/KBC1bzNUR9V7eXYQOcf
wkIP56fW7e0=
=Vs44
-----END PGP SIGNATURE-----