Microsoft has released SP1 to SCCM 2012 R2 – see this article : http://blogs.technet.com/b/configmgrteam/archive/2015/05/14/announcing-the-availability-of-sysctr-2012-r2-configmgr-sp1-and-sysctr-2012-configmgr-sp2.aspx Download from: https://www.microsoft.com/en-us/evalcenter/evaluate-system-center-2012-r2-configuration-manager-and-endpoint-protection Take a backup of your SCCM enviroment before upgrading. Extract the downloaded file – SC2012_SP2_Configmgr_SCEP.exe Run the .\SC2012_SP2_Configmgr_SCEP\SMSSETUP\BIN\X64\setupdl.exe for downloading the prereq files. After downloading the prereq files your ready to upgrade the SCCM enviroment. Start the .\SC2012_SP2_Configmgr_SCEP\splash.hta as an administrator
Click install
Click Next
Click Next
Click “I accept these license terms” Click next
Accept all 3 license Terms Click Next
Enter the download place for the previous downloaded prereq Click Next
Click Next
Click Next
Click Next
Click Next
Click “Begin Install”
Click view log to show what happens in the bagground
Close the log file
Click close after end installation
And now the SCCM site has version 5.00.8239.1000 – and are ready for SCCM client upgrade.
How to upgrade SCCM 2012 R2 to SCCM 2012 R2 Sp1

Worked out exactly as posted here, Just follow the install notes and you will be fine.