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I came across this recently:
http://www.eweek.com/security/google-reveals-critical-flaws-in-dnsmasq-software-packages?utm_medium=email&utm_campaign=EWK_NL_EP_20171006_STR2L2&dni=426558309&rni=22079222
Discussed in several threads already. https://forum.pfsense.org/index.php?topic=137418.0