The following errata for CentOS-2 have been built and uploaded to the centos mirror:

RHSA-2008:0134-01 Moderate: tcltk security update

Files available: expect-5.38.0-75.i386.rpm itcl-3.2-75.i386.rpm tcl-8.3.3-75.i386.rpm tcllib-1.0-75.i386.rpm tclx-8.3-75.i386.rpm tix-8.2.0b1-75.i386.rpm tk-8.3.3-75.i386.rpm

More details are available from the RedHat web site at https://rhn.redhat.com/errata/rh21as-errata.html

The easy way to make sure you are up to date with all the latest patches is to run: # yum update