iDefense Security Advisory 06.04.08 http://labs.idefense.com/intelligence/vulnerabilities/ Jun 04, 2008 I. BACKGROUND aspersky 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 stack-based buffer overflow in Kaspersky Lab's Internet Security could allow an attacker to execute arbitrary code in the context of the kernel. The kl1.sys kernel driver distributed with Internet Security contains a stack-based buffer overflow in the handling of IOCTL 0x800520e8. This issue is caused by a failure to properly perform bounds checks on user-supplied data that is passed to the swprintf function as a source buffer. The destination buffer in this case is a 2,000 element wide-character array. If the source buffer exceeds 2,000 characters, a buffer overflow will occur leading to the execution of arbitrary code. III. ANALYSIS Exploitation of this issue allows an attacker to execute arbitrary code within the kernel. An attacker would need local access to a vulnerable computer to exploit this vulnerability. IV. DETECTION Kasperky Lab's Internet Security version 7.0.1.325 is confirmed to be vulnerable to this issue. Previous versions are also suspected to be vulnerable. V. WORKAROUND iDefense is unaware of any workaround for this issue. VI. VENDOR RESPONSE Kaspersky Lab has addressed this vulnerability by releasing updated anti-virus definition databases. For more information, refer the their article at the following URL. http://www.kaspersky.com/technews?id=203038727 VII. CVE INFORMATION The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2008-1518 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 03/19/2008 Initial vendor notification 03/20/2008 Initial vendor response 06/04/2008 Coordinated public disclosure IX. CREDIT This vulnerability was reported to iDefense by Tobias Klein. 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@xxxxxxxxxxxx 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.
