CentOS Errata and Security Advisory 2005:748
https://rhn.redhat.com/errata/RHSA-2005-748.html
The following updated files have been uploaded and are currently syncing to the mirrors:
files: updates/i386/RPMS/php-4.3.2-25.ent.i386.rpm updates/i386/RPMS/php-devel-4.3.2-25.ent.i386.rpm updates/i386/RPMS/php-imap-4.3.2-25.ent.i386.rpm updates/i386/RPMS/php-ldap-4.3.2-25.ent.i386.rpm updates/i386/RPMS/php-mysql-4.3.2-25.ent.i386.rpm updates/i386/RPMS/php-odbc-4.3.2-25.ent.i386.rpm updates/i386/RPMS/php-pgsql-4.3.2-25.ent.i386.rpm
To apply these run: yum update php*
-sv