Is this a Security Problem with Pfsense

[Ryu945]

https://security.googleblog.com/2016/02/cve-2015-7547-glibc-getaddrinfo-stack.html

Is this a problem with Pfsense?

What network adjustment should be done to protect devices that have not been patched?

[dotdash]

@https://blog.des.no/2016/02/freebsd-and-cve-2015-7547/:

First of all: neither FreeBSD itself nor native FreeBSD applications are affected. While the resolver in FreeBSD’s libc and GNU libc share a common ancestry, the bug was introduced when the latter was rewritten to send A and AAAA queries in parallel rather than sequentially when the application requests both.

[kpa]

The base FreeBSD has never used glibc and never will because of the licence.

[Ryu945]

What about the second question.  Is there a rule I can apply to protect unpatched devices?