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Symantec AntiVirus Remote Stack Buffer Overflow Vulnerability

Risk

High

Date Discovered

May 24, 2006

Description

Multiple Symantec products are prone to a remote stack buffer-overflow vulnerability. This issue allows remote attackers to execute arbitrary machine code with SYSTEM-level privileges, facilitating the complete compromise of affected computers. Symantec AntiVirus Corporate Edition 10.1 and Symantec Client Security 3.1 are currently known to be vulnerable to this issue. All supported platforms are affected including Microsoft Windows and Novell Netware.

Technologies Affected

  • Symantec AntiVirus Corporate Edition 10.0.0
  • Symantec AntiVirus Corporate Edition 10.0.2 .2001
  • Symantec AntiVirus Corporate Edition 10.0.2.2000
  • Symantec AntiVirus Corporate Edition 10.0.2.2010
  • Symantec AntiVirus Corporate Edition 10.0.2.2020
  • Symantec AntiVirus Corporate Edition 10.1
  • Symantec AntiVirus Corporate Edition 10.1.0.394
  • Symantec AntiVirus Corporate Edition 10.1.0.400
  • Symantec Client Security 3.0.0
  • Symantec Client Security 3.0.2.2000
  • Symantec Client Security 3.0.2.2001
  • Symantec Client Security 3.0.2.2010
  • Symantec Client Security 3.0.2.2020
  • Symantec Client Security 3.1
  • Symantec Client Security 3.1.0.394
  • Symantec Client Security 3.1.0.400

Recommendations

Block external access at the network boundary, unless external parties require service.

If global access isn't required, filter access to the affected computer at the network boundary. Restricting access to only trusted computers and networks might greatly reduce the likelihood of exploits.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.

Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity. This includes but is not limited to requests that include NOP sleds and unexplained incoming and outgoing traffic. This may indicate exploitation attempts or activity that results from successful exploitation.

Implement multiple redundant layers of security.

Various memory-protection schemes (such as nonexecutable and randomly mapped memory segments) may hinder an attacker's ability to exploit this vulnerability to execute arbitrary code.

Modify default configuration files to disable any unwanted behavior.

Disable the remote management interface of the vulnerable application if it isn't required.
Symantec has released an advisory with more information regarding this issue. Fixes for all supported platforms, including Microsoft Windows and Novell NetWare, are available from the following URI: http://www.symantec.com/techsupp/enterprise/select_product_updates.html Fixes for localized versions are available from the following URI: http://service1.symantec.com/SUPPORT/ent-security.nsf/docid/2006052609181248 NOTE: Given the recent spike in exploit activity in the wild by 'W32.Sagevo', customers running vulnerable versions of the affected software should install fixes as soon as possible.

Credits

Derek Soeder is credited with the discovery of this vulnerability.
Copyright © Symantec Corporation.
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.

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.
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.

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