Revision History
None

Risk Impact
Medium

Remote Access	No
Local Access	Yes
Authentication Required	Yes
Exploit publicly available	Yes*

Overview
Some versions of Symantec’s device driver SPBBCDRV.SYS contain a vulnerability which, if successfully exploited, could allow a local attacker to cause the system to crash.

Affected Products

Product	Version	Solution(s)
Norton 360	1.x	Run LiveUpdate in Interactive Mode
Norton AntiSpam	2004, 2005	Run LiveUpdate in Interactive Mode
Norton AntiVirus	2004 through 2008	Run LiveUpdate in Interactive Mode
Norton Internet Security	2004 through 2008	Run LiveUpdate in Interactive Mode
Norton Personal Firewall	2004, 2005, 2006	Run LiveUpdate in Interactive Mode
Norton System Works	2004, 2005, 2006	Run LiveUpdate in Interactive Mode
Symantec AntiVirus Corporate Edition	10.0.x, all	SAV 10.1 MR7 and later
	10.1.x, all versions prior to the fix
Symantec Client Security	3.0.x	SCS 3.1 MR7 and later
	3.1.x ,all versions prior to the fix

Unaffected Products

Product	Version	Build
Norton 360	2.x	all
Norton Confidential	all	all
Norton AntiVirus	2009 and later	all
Norton AntiVirus Gaming Edition	all	all
Norton Internet Security	2009 and later	all
Norton Personal Firewall	2009 and later	all
Symantec AntiVirus Corporate Edition	9.x	all
Symantec AntiVirus Corporate Edition	10.2	all
Symantec AntiVirus for Linux	1.x	all
Symantec Client Security	2.x	all
Symantec Endpoint Protection	11.x	all

Details
Symantec was notified of a potential Denial of Service (DoS) vulnerability in the Symantec device driver SPBBCDRV.SYS. The vulnerability is caused by a failure to validate arguments sent to NtCreateMutant and NtOpenEvent.

A potential attacker must be logged into the target computer to attempt an exploit. A successful exploit of this vulnerability could potentially allow that user to crash their computer.

Symantec response
Symantec engineers have verified that the vulnerability exists in the products listed in the Affected Products table above, and have provided updates to correct the problem.

Symantec is not aware of any customers impacted by this issue, or of any attempts to exploit the issue

Updating Consumer (Norton) products
Symantec Norton product users who regularly launch and run LiveUpdate should already have received an updated (non-vulnerable) version of SPBBCDRV.SYS. However, to ensure all available updates have been applied, users can run a manual LiveUpdate as follows:

• Open any installed Norton product
• Click LiveUpdate
• Run LiveUpdate until all available product updates are downloaded and installed
• A system reboot is required for this update

Best Practice
Symantec recommends any affected customers update their product to protect against potential attempts to exploit this issue. As part of normal best practices, Symantec recommends the following:

• Run under the principle of least privilege to limit the impact of attempted exploits.
• Limit access to trusted users.
• Keep all operating systems and applications updated with the latest vendor patches.
• Follow a multi-layered approach to security. Run both firewall and antivirus software to provide multiple points of detection and protection from inbound and outbound threats.

Credit
This issue was reported by Matousec-Transparent.

References
This issue is a candidate for inclusion in the Common Vulnerabilities and Exposures (CVE) list (http://cve.mitre.org), which standardizes names for security problems. The CVE initiative has assigned CVE-2007-1793 to this issue.

SecurityFocus has assigned BugTraq ID (BID) 23241 to this vulnerability.

Symantec takes the security and proper functionality of our products very seriously. As founding members of the Organization for Internet Safety (OISafety), Symantec supports and follows the principles of responsible disclosure. Symantec also subscribes to the vulnerability disclosure guidelines outlined by the National Infrastructure Advisory Council (NIAC).

Please contact secure@symantec.com if you feel you have discovered a security issue in a Symantec product. A Symantec Product Security team member will contact you regarding your submission. Symantec strongly recommends using encrypted email for reporting vulnerability information to secure@symantec.com. The Symantec Product Security PGP key can be found at the end of this message.

Symantec has developed a Product Vulnerability Response document outlining the process we follow in addressing suspected vulnerabilities in our products. This document is available below.

Symantec Vulnerability Response Policy

Symantec Product Vulnerability Management PGP Key

Copyright © by Symantec Corp.
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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.

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