It has been released Configuration Manager 2012 SP1 Cumulative Update 3.
Three issues were fixed in this post update, the most important one
is the SQL Update part of the Cumulative Update 3 installation that
fails when the date format on the instance of Microsoft SQL Server is
defined in the DD/MM/YYYY format. (which is commonly used in Europe)
Get more information about the update and download it from here:
http://support.microsoft.com/kb/2894539
Otherwise if you want a tutorial that show how install CU3 and verify that everythings it's ok I suggest you this article:
How to install CU3 and recognize the update afterwards