Recently Googly discover glibc getaddrinfo (CVE-2015-7547) vulnerability: https://googleonlinesecurity.blogspot.co.il/2016/02/cve-2015-7547-glibc-getaddrinfo-stack.html
We run our application on CentOS 6. I found here the following: https://rhn.redhat.com/errata/RHSA-2016-0225.html
Note: this issue is only exposed when libresolv is called from the
nss_dns NSS service module. (CVE-2015-7547)
Should I update glibc if I do not configure DNS? I have the following in /etc/resolv.conf
nameserver 127.0.0.1