Provide references for CVE-2017-16938.
Where can I find more information about CVE-2017-16938?
References are available at: https://lists.debian.org/debian-lts-announce/2017/11/msg00042.html, https://www.debian.org/security/2017/dsa-4058, https://sourceforge.net/p/optipng/bugs/69/, https://security.gentoo.org/glsa/201801-02.