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Security Activity Bulletin

McAfee VirusScan DAT Update May Cause Microsoft Windows System Failure

 
Threat Type:IntelliShield: Applied Mitigation Bulletin
IntelliShield ID:20375
Version:2
First Published:2010 April 21 18:52 GMT
Last Published:2010 April 22 14:58 GMT
Port: Not available
Urgency:Probable Use
Credibility:Confirmed
Severity:Mild Damage
 
Version Summary:

McAfee has released a knowledgebase article with workarounds to address the McAfee VirusScan DAT file update error.

 

Description
 

Reports indicate that new releases of a McAfee DAT file that was distributed to VirusScan applications has caused errors on certain Microsoft Windows XP-based systems.?

As a result of installing the 5958 DAT file and rebooting, systems may be rendered unusable.? Impacted systems may continuously reboot after reporting false virus infections related to the W32/Wecorl.a virus, which is described by McAfee in the following virus profile: W32/Wecorl.a.? Because affected systems may only become unusable after a reboot, users are advised not to restart systems with the affected DAT file.?

Administrators can remove the affected DAT file from systems by entering Microsoft Windows Safe Mode and restoring the DAT file to a previous version.

Alternately, administrators can prevent McAfee VirusScan from installing the affected updates by blocking internal clients and distribution servers from accessing McAfee update servers.? Administrators are also advised to test updates before distributing them to client systems.

McAfee has released a knowledgebase article with various workarounds at the following link: KB68780

 
Alert History
 

Version 1, April 21, 2010, 2:52 PM: A recently released McAfee DAT file may cause Microsoft Windows XP systems to continuously reboot.



Product Sets
 
The security vulnerability applies to the following combinations of products.

Primary Products:
IntelliShieldSecurity Activity Bulletin Original Release Base

Associated Products:
N/A




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