CentOS Errata and Security Advisory 2005:748

https://rhn.redhat.com/errata/RHSA-2005-748.html

UPDATE info: This package was updated to resolve centos bug #999. The packages were not handling the mail() call correctly.

The following updated files have been uploaded and are currently syncing to the mirrors:

files:

updates/i386/RPMS/php-4.3.2-25.ent.centos.1.i386.rpm
updates/i386/RPMS/php-devel-4.3.2-25.ent.centos.1.i386.rpm
updates/i386/RPMS/php-imap-4.3.2-25.ent.centos.1.i386.rpm
updates/i386/RPMS/php-ldap-4.3.2-25.ent.centos.1.i386.rpm
updates/i386/RPMS/php-mysql-4.3.2-25.ent.centos.1.i386.rpm
updates/i386/RPMS/php-odbc-4.3.2-25.ent.centos.1.i386.rpm
updates/i386/RPMS/php-pgsql-4.3.2-25.ent.centos.1.i386.rpm

To apply these run:
yum update php\*