McAfee VirusScan DAT Update May Cause Microsoft Windows System Failure
IntelliShield: Applied Mitigation Bulletin
2010 April 21 18:52 GMT
2010 April 22 14:58 GMT
McAfee has released a knowledgebase article with workarounds to address the McAfee VirusScan DAT file update error.
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
Version 1, April 21, 2010, 2:52 PM: A recently released McAfee DAT file may cause Microsoft Windows XP systems to continuously reboot.
The security vulnerability applies to the following combinations of products.
Security Activity Bulletin
Original Release Base
The urgency and severity ratings of this alert are not tailored to individual users; users may value alerts differently based upon their network configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.