Provide references for CVE-2017-15864.
Where can I find more information about CVE-2017-15864?
References are available at: https://www.debian.org/security/2017/dsa-4047, https://www.otrs.com/security-advisory-2017-06-security-update-otrs-3-3/, https://lists.debian.org/debian-lts-announce/2017/12/msg00015.html.