iDefense Security Advisory 10.19.06: Kaspersky Labs Anti-Virus IOCTL Local Privilege Escalation Vulnerability
Kaspersky Labs Anti-Virus IOCTL Local Privilege Escalation Vulnerability
iDefense Security Advisory 10.19.06
http://www.idefense.com/intelligence/vulnerabilities/
Oct 19, 2006
I. BACKGROUND
Kaspersky Anti-Virus provides virus and spyware protection. More
information about Kaspersky Labs Anti-Virus can be found by visiting
http://www.kaspersky.com/
II. DESCRIPTION
Local exploitation of a design error vulnerability in Kaspersky Labs
Anti-Virus allows an attacker to execute arbitrary code with kernel
privileges.
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.
III. ANALYSIS
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
be successful.
IV. DETECTION
iDefense has confirmed the existence of this vulnerability within
version 2.0.0.281 of the KLICK and KLIN device drivers as shipped with
6.0.0.303 of Kaspersky Labs Anti-Virus. Previous versions are suspected
to be vulnerable as well.
V. WORKAROUND
iDefense is currently unaware of any effective workaround for this
issue.
VI. VENDOR RESPONSE
Kaspersky Labs has addressed this vulnerability with version 2.0.0.333
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
security problems.
VIII. DISCLOSURE TIMELINE
09/18/2006 Initial vendor notification
09/19/2006 Initial vendor response
10/19/2006 Coordinated public disclosure
IX. CREDIT
This vulnerability was reported to iDefense by Rubén Santamarta of
reversemode.com.
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X. LEGAL NOTICES
Copyright © 2006 iDefense, Inc.
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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.