Microsoft Windows SMBv2 Code Signing Remote Code Execution Vulnerability



Date Discovered

December 11, 2007


Microsoft Windows is prone to a remote code-execution vulnerability because it fails to properly validate digital signatures. Successfully exploiting this issue allows remote attackers to execute arbitrary machine code in the context of logged-in users. This facilitates the remote compromise of affected computers.

Technologies Affected

  • HP Storage Management Appliance 2.1
  • HP Storage Management Appliance I
  • HP Storage Management Appliance II
  • HP Storage Management Appliance III
  • Microsoft Windows Vista
  • Microsoft Windows Vista Business
  • Microsoft Windows Vista Enterprise
  • Microsoft Windows Vista Home Basic
  • Microsoft Windows Vista Home Premium
  • Microsoft Windows Vista Ultimate
  • Microsoft Windows Vista x64 Edition


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 unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from a successful exploit.

Run all software as a nonprivileged user with minimal access rights.
Running all applications with the least amount of privileges possible can reduce the impact of a successful exploit.

Microsoft has released an advisory along with fixes to address this issue. Please see the references for more information.



The vendor disclosed this vulnerability.

© 1995- 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


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 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.