I. BACKGROUND
Internet Security
Systems (ISS) has developed a suite of tools aimed at
securing server and desktop systems. A
flaw exists within a central
module to these components that can allow unprivileged users to
obtain
complete control of the machine.
http://www.iss.net/products_services/produc
ts.php
II. DESCRIPTION
Local exploitation of a
design error in the multiple Internet Security
Systems (ISS) products may allow a user to gain
System level privileges.
Exploitation of this issue is trival and can be done
manually.
This exploit has been confirmed in ISS BlackIce 3.6 product and
is
reportedly also found in the following products:
- BlackICE PC Protection
(Consumer)
- BlackICE Server Protection (Consumer)
- BlackICE Agent for Server
(Corporate)
- RealSecure Desktop 3.6 and 7.0 (Corporate)
To exploit this condition you
must first trigger an action that would
initiate the Application Protection Module to display a
warning. For the
BlackIce product, this can be initiated by launching any executable
moved
or installed after the product itselft was first installed.
From the "Application Protection"
dialog press the "More Info" button
with will bring up a secondary form. With this form active,
pressing the
F1 key will bring up the standard Windows Open File dialog prompting the
user
to manually locate the help file for the application.
The problem arises when the BlackIce
process fails to drop
permissions before launching the help dialog. If a user resets
the
dialog file mask by entering *.exe [enter] they can then launch any
executable on the
system from the dialog by right clicking on it and
choosing "open". Applications run in this manner
will be executed with
System level rights.
III.
ANALYSIS
Successful exploitation allows a local attacker to execute
arbitrary
commands as the System Administrator user. This allows complete
system
compromise including the installation and removal of applications, and
ability to
read and write any file on the system.
IV.
DETECTION
iDefense has confirmed this vulnerability exists in version 3.6 of
ISS
BlackIce PC Desktop for Windows with all current updates applied.
V.
WORKAROUND
There is currently no known work around for this
issue.
VI. VENDOR RESPONSE
"This issue does not
affect Proventia Desktop, which is a replacement
product for and a free upgrade from RealSecure
Desktop 3.6 and 7.0. Nor
does this issue affect Proventia Server, which is a replacement
product
for and a free upgrade from BlackICE Agent for Server. There are no
other ISS
products that use the components described."
VII. CVE
INFORMATION
The Common Vulnerabilities and Exposures (CVE) project has
assigned the
name CAN-2005-2711 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
08/23/2005
Initial vendor notification
08/24/2005 Initial vendor response
03/23/2005 Public
disclosure
IX. CREDIT
The discoverer of this
vulnerability wishes to remain anonymous.
Get paid for vulnerability
research
http://www.idefense.com/poi/teams/vcp.jsp
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X. LEGAL
NOTICES
Copyright (c) 2006 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 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.
