CentOS Errata and Security Advisory 2015:1012 Important
Upstream details at : https://rhn.redhat.com/errata/RHSA-2015-1012.html
The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename )
x86_64: 89f666c144a237773ea1e85a09c865cd4f3de35b269c6eb9699e895909ee1527 thunderbird-31.7.0-1.el7.centos.x86_64.rpm
Source: 283c1401339932a32958dd43275409bddbcd84ae7393129f22ec0c69c813432e thunderbird-31.7.0-1.el7.centos.src.rpm