Many words have been written about the new IE zero-day vulnerability which was used in the China attack. Microsoft will release a patch today to fix the Aurora vulnerability. I recommend to update your windows with the new patch.
Please note that we have checked all the Aurora exploit samples we received and they are all being detected by eSafe.
More from MS site: http://www.microsoft.com/technet/security/bulletin/ms10-jan.mspx
