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iDefense Security Advisory 10.19.06: Kaspersky Labs Anti-Virus IOCTL Local Privilege Escalation Vulnerability
From: iDefense Labs <labs-no-reply () idefense com>
Date: Thu, 19 Oct 2006 15:49:34 -0400
Kaspersky Labs Anti-Virus IOCTL Local Privilege Escalation Vulnerability
iDefense Security Advisory 10.19.06
Oct 19, 2006
Kaspersky Anti-Virus provides virus and spyware protection. More
information about Kaspersky Labs Anti-Virus can be found by visiting
Local exploitation of a design error vulnerability in Kaspersky Labs
Anti-Virus allows an attacker to execute arbitrary code with kernel
The vulnerability specifically exists due to improper address space
validation when the KLIN and KLICK device drivers processes IOCTL
0x80052110. By passing a specially crafted Irp structure to the affected
IOCTL handler, attackers can cause the driver to execute arbitrary code
via a CALL instruction using user supplied data. Execution of data
stored in user-land buffers is trivial.
Exploitation allows attackers to gain elevated privileges by executing
code within kernel context. This allows attackers to gain control of the
affected system. However, local access is required for exploitation to
iDefense has confirmed the existence of this vulnerability within
version 184.108.40.2061 of the KLICK and KLIN device drivers as shipped with
220.127.116.113 of Kaspersky Labs Anti-Virus. Previous versions are suspected
to be vulnerable as well.
iDefense is currently unaware of any effective workaround for this
VI. VENDOR RESPONSE
Kaspersky Labs has addressed this vulnerability with version 18.104.22.1683
of the KLIN.sys and KLICK.sys device drivers. These drivers can be
obtained by utilizing Kaspersky's Update update service.
VII. CVE INFORMATION
The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2006-4926 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org), which standardizes names for
VIII. DISCLOSURE TIMELINE
09/18/2006 Initial vendor notification
09/19/2006 Initial vendor response
10/19/2006 Coordinated public disclosure
This vulnerability was reported to iDefense by Rubén Santamarta of
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X. LEGAL NOTICES
Copyright © 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,
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- iDefense Security Advisory 10.19.06: Kaspersky Labs Anti-Virus IOCTL Local Privilege Escalation Vulnerability iDefense Labs (Oct 19)