WelcomeEnterpriseSmall BusinessHome & Home OfficePartnersAbout Symantec
September 05, 2007
Symantec SYMTDI.SYS Device Driver Local Denial of Service

Revision History

Risk Impact

Remote AccessNo
Local AccessYes
Authentication RequiredYes, to the local system
Exploit availableNo

Some versions of Symantecís device driver SYMTDI.SYS contain a vulnerability which, if successfully exploited, could allow a local attacker to cause the system to crash.

Affected Products
Norton AntiSpam2005Run LiveUpdate in Interactive Mode
Norton AntiVirus2005,2006Run LiveUpdate in Interactive Mode
Norton Internet Security2005,2006Run LiveUpdate in Interactive Mode
Norton Personal Firewall2005,2006Run LiveUpdate in Interactive Mode
Norton System Works2005,2006Run LiveUpdate in Interactive Mode
Symantec AntiVirus Corporate Edition10.0.xSAV 10.1 MR6 MP1 or later
Symantec AntiVirus Corporate Edition9.x SAV 9 MR6 MP1
Symantec Client Security 3.1.xSCS 3.1 MR6 MP1 or later
Symantec Client Security2.xSCS 2.0 MR6 MP1

All builds prior to the listed solution are affected by this issue. For additional information on updating Symantec Client Security and Symantec AntiVirus Corporate Edition, please see this Knowledgebase article:

Unaffected Products
Norton 360allall
Norton AntiBotallall
Norton Confidentialallall
Norton AntiVirus2007and laterall
Norton Internet Security2007and laterall
Symantec AntiVirus Corporate Edition10.2.xall
Symantec AntiVirus for Linux10.xall

Symantec was notified of a potential denial of service vulnerability in the device driver SYMTDI.SYS. A specially crafted IRP sent to an IOCTL handler function could allow memory to be overwritten because the address space was not properly validated in some versions of the driver. A potential attacker must be logged into the 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 SYMTDI.SYS. However, to ensure all available updates have been applied, users can run a manual LiveUpdate as follows:

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

Best Practices
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 exploits.
  • Restrict access to computer systems to trusted users only.
  • 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.

This issue was reported by Matousec-Transparent.

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-2007-1476 to this issue.
SecurityFocus has assigned BID 22977 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.

PDF Symantec Vulnerability Response Policy PGP Symantec Product Vulnerability Management PGP Key

Copyright © by Symantec Corp.
Permission to redistribute this alert electronically is granted as long as it is not edited in any way unless authorized by Symantec Security Response. Reprinting the whole or part of this alert in any medium other than electronically requires permission from secure@symantec.com.

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.

Symantec, Symantec products, Symantec Security Response, and secure@symantec.com are registered trademarks of Symantec Corp. and/or affiliated companies in the United States and other countries. All other registered and unregistered trademarks represented in this document are the sole property of their respective companies/owners.

Initial Post on: Wednesday, 05-Sep-07 11:50:00
Last modified on: Thursday, 06-Sep-07 07:23:27