Date Discovered October 14, 2008
Description Microsoft Windows is prone to a remote code execution vulnerability caused by a buffer-underflow condition in the SMB (Server Message Block) protocol implementation.
To exploit the issue, an attacker must first successfully authenticate as a legitimate user or a Guest user on the affected computer. A successful exploit will completely compromise the affected computer.
Block external access at the network boundary, unless external parties require service. Block remote access to SMB services at the network perimeter. Permit access for trusted computers and networks only.
Deploy network intrusion detection systems to monitor network traffic for malicious activity. Deploy NIDS to monitor network traffic for signs of suspicious or anomalous activity. This may help detect malicious actions that an attacker may take after successfully exploiting vulnerabilities.
Change default user IDs and passwords.
Ensure that the guest user account is disabled. This will limit exposure to this and other potential vulnerabilities.
Microsoft has released a security bulletin and fixes to address this vulnerability.
Credits Joshua Morin of Codenomicon
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 email@example.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 firstname.lastname@example.org
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.