Provide references for CVE-2019-6339.
Where can I find more information about CVE-2019-6339?
References are available at: https://www.debian.org/security/2019/dsa-4370, https://www.drupal.org/sa-core-2019-002, https://lists.debian.org/debian-lts-announce/2019/02/msg00004.html.