The following security updates has been released for CentOS 6:

CESA-2017:1267 Important CentOS 6 rpcbind Security Update
CESA-2017:1268 Important CentOS 6 libtirpc Security Update

CESA-2017:1267 Important CentOS 6 rpcbind Security Update

CentOS Errata and Security Advisory 2017:1267 Important

Upstream details at : https://rhn.redhat.com/errata/RHSA-2017-1267.html

The following updated files have been uploaded and are currently
syncing to the mirrors: ( sha256sum Filename )

i386:
9c11e7bbce5dab16b850853f4326f33f964dbfbb37f74b73b8db6f9f0f7d5f63 rpcbind-0.2.0-13.el6_9.i686.rpm

x86_64:
6d58fc80fd6222919987dae28bb21027ec7847004e8ec8981b0fa92861d090a2 rpcbind-0.2.0-13.el6_9.x86_64.rpm

Source:
b0176907e5c14eb295702cd39ada3f60cdbf05010508420a68696bfd206d6489 rpcbind-0.2.0-13.el6_9.src.rpm

CESA-2017:1268 Important CentOS 6 libtirpc Security Update

CentOS Errata and Security Advisory 2017:1268 Important

Upstream details at : https://rhn.redhat.com/errata/RHSA-2017-1268.html

The following updated files have been uploaded and are currently
syncing to the mirrors: ( sha256sum Filename )

i386:
3684bcc6ce857f6c24a6af3dde4d99b2004cf1d99d6597d43342dfd84d57b719 libtirpc-0.2.1-13.el6_9.i686.rpm
4cd594d71db84acf14778290e41e881bd59a0888fd43ebadba1fc2a1ec71bd32 libtirpc-devel-0.2.1-13.el6_9.i686.rpm

x86_64:
3684bcc6ce857f6c24a6af3dde4d99b2004cf1d99d6597d43342dfd84d57b719 libtirpc-0.2.1-13.el6_9.i686.rpm
2c3d4212c9f672ce596a588e4b3842e345e6dc1912e73c0f3ce6923d0e7564b4 libtirpc-0.2.1-13.el6_9.x86_64.rpm
4cd594d71db84acf14778290e41e881bd59a0888fd43ebadba1fc2a1ec71bd32 libtirpc-devel-0.2.1-13.el6_9.i686.rpm
95b3827651bf9ec144bc231d1694161e9528179a29f2bf54728e7e39b60f32c3 libtirpc-devel-0.2.1-13.el6_9.x86_64.rpm

Source:
e2b020c0ae829d04df4c22787a637f11d066b958e091d986f6661f0fc70d893a libtirpc-0.2.1-13.el6_9.src.rpm