Home / vulnerabilities 04.03.07-6.txt
Posted on 05 April 2007
Source : packetstormsecurity.org Link
Kaspersky Internet Security Suite klif.sys Heap Overflow Vulnerability
iDefense Security Advisory 04.03.07
http://labs.idefense.com/intelligence/vulnerabilities/
Apr 03, 2007
I. BACKGROUND
Kaspersky Internet Security Suite is a combination of Kaspersky
anti-virus, anti-spam, and personal firewall in one product. For more
information see the vendor's website at the following URL.
http://www.kaspersky.com/
II. DESCRIPTION
Local exploitation of a heap overflow vulnerability in Kaspersky Lab's
Internet Security Suite klif.sys could allow an attacker to execute
arbitrary code within kernel context.
The klif.sys driver is part of the "anti-hacker" proactive protection.
As part of this defense, the driver hooks and screens various system
calls, such as registry functions.
The hook function for the _NtSetValueKey() function is vulnerable to an
integer overflow that leads to a kernel heap overflow. Passing a large
unsigned value for the data size argument results in an arithmetic
overflow when calculating the amount of memory to allocate. A copy
operation into this buffer results in corruption of kernel memory.
III. ANALYSIS
Exploitation allows an attacker to execute code with kernel privileges.
This vulnerability lets an attacker overwrite a nearly arbitrary amount
of kernel heap memory with arbitrary data. Exploitation of kernel heap
based buffer overflows is both difficult and unreliable. However, there
are documented methods for exploiting these types of overflows.
IV. DETECTION
iDefense confirmed this vulnerability in Kaspersky Internet Security
6.0.1.411 for Windows. Previous versions may also be affected.
V. WORKAROUND
iDefense is currently unaware of any workarounds for this issue.
VI. VENDOR RESPONSE
Kaspersky has addressed this vulnerability within Maintenance Pack 2.
More information is available from the vendor's advisory at the
following URLs.
http://www.kaspersky.com/technews?id=203038693
http://www.kaspersky.com/technews?id=203038694
VII. CVE INFORMATION
A Mitre Corp. Common Vulnerabilities and Exposures (CVE) number has not
been assigned yet.
VIII. DISCLOSURE TIMELINE
01/24/2007 Initial vendor notification
03/02/2007 Second vendor notification
03/05/2007 Initial vendor response
04/03/2007 Coordinated public disclosure
IX. CREDIT
The discoverer of this vulnerability wishes to remain anonymous.
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X. LEGAL NOTICES
Copyright © 2007 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.
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