CentOS Errata and Security Advisory 2008:0561
https://rhn.redhat.com/errata/RHSA-2008-0561.html
The following updated files have been uploaded and are currently syncing to the mirrors:
s390: updates/s390/RPMS/irb-1.8.1-7.el4_6.1.s390.rpm updates/s390/RPMS/ruby-1.8.1-7.el4_6.1.s390.rpm updates/s390/RPMS/ruby-devel-1.8.1-7.el4_6.1.s390.rpm updates/s390/RPMS/ruby-docs-1.8.1-7.el4_6.1.s390.rpm updates/s390/RPMS/ruby-libs-1.8.1-7.el4_6.1.s390.rpm updates/s390/RPMS/ruby-mode-1.8.1-7.el4_6.1.s390.rpm updates/s390/RPMS/ruby-tcltk-1.8.1-7.el4_6.1.s390.rpm
s390x: updates/s390x/RPMS/irb-1.8.1-7.el4_6.1.s390x.rpm updates/s390x/RPMS/ruby-1.8.1-7.el4_6.1.s390x.rpm updates/s390x/RPMS/ruby-devel-1.8.1-7.el4_6.1.s390x.rpm updates/s390x/RPMS/ruby-docs-1.8.1-7.el4_6.1.s390x.rpm updates/s390x/RPMS/ruby-libs-1.8.1-7.el4_6.1.s390x.rpm updates/s390x/RPMS/ruby-mode-1.8.1-7.el4_6.1.s390x.rpm updates/s390x/RPMS/ruby-tcltk-1.8.1-7.el4_6.1.s390x.rpm