Versions mentioned in the description apply to the upstream
Remediation section below for
Ubuntu:16.04 relevant versions.
Stack-based buffer overflow in the getaddrinfo function in sysdeps/posix/getaddrinfo.c in the GNU C Library (aka glibc or libc6) allows remote attackers to cause a denial of service (crash) via vectors involving hostent conversion. NOTE: this vulnerability exists because of an incomplete fix for CVE-2013-4458.
glibc to version 2.23-0ubuntu6 or higher.