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

RHSA-2007:0731-01 Important: tetex security update

Files available:
tetex-1.0.7-38.5E.11.i386.rpm
tetex-afm-1.0.7-38.5E.11.i386.rpm
tetex-doc-1.0.7-38.5E.11.i386.rpm
tetex-dvilj-1.0.7-38.5E.11.i386.rpm
tetex-dvips-1.0.7-38.5E.11.i386.rpm
tetex-fonts-1.0.7-38.5E.11.i386.rpm
tetex-latex-1.0.7-38.5E.11.i386.rpm
tetex-xdvi-1.0.7-38.5E.11.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