CentOS Errata and Security Advisory 2005:828
https://rhn.redhat.com/errata/RHSA-2005-828.html
The following updated files have been uploaded and are currently syncing to the mirrors:
s390: updates/s390/RPMS/libungif-4.1.3-1.el4.2.s390.rpm updates/s390/RPMS/libungif-devel-4.1.3-1.el4.2.s390.rpm updates/s390/RPMS/libungif-progs-4.1.3-1.el4.2.s390.rpm
s390x: updates/s390x/RPMS/libungif-4.1.3-1.el4.2.s390x.rpm updates/s390x/RPMS/libungif-devel-4.1.3-1.el4.2.s390x.rpm updates/s390x/RPMS/libungif-progs-4.1.3-1.el4.2.s390x.rpm