While waiting for Update Rollup 2 for System Center 2012 SP1 it seems System Center 2012 without SP1 received its UR5. In this update only two of the components receive fixes:
Virtual Machine Manager (KB2824618)
A host that is put into maintenance mode does not load-balance virtual machines in a cluster during evacuation. This causes host reserve saturation.
Operations Manager (KB2831729)
The Solaris agent could run out of file descriptors when many multi-version file systems (MVFS) are mounted.
Logical and physical disks are not discoverable on AIX-based computers when a disk device file is contained in a subdirectory.
Rules and monitors that were created by using the UNIX/Linux Shell Command templates do not contain overridable ShellCommand and Timeout parameters.
Process monitors that were created by using the UNIX/Linux Process Monitoring template cannot save in an existing management pack that has conflicting references to library management packs.
The Linux agent cannot install on a CentOS or Oracle Linux host by using the FIPS version of OpenSSL 0.9.8.
Full description of the update and download links you kind find in KB article.
Read carefully the installation instructions as the update for SCOM has some special instructions. I would also wait System Center Monitoring Pack for UNIX and Linux Operating Systems to be updated because it is part of the update. The current download is still from 01.08.2013.