Provide references for CVE-2018-12557.
Where can I find more information about CVE-2018-12557?
References are available at: http://lists.zuul-ci.org/pipermail/zuul-announce/2018-June/000015.html, https://storyboard.openstack.org/#%21/story/2002177, https://git.zuul-ci.org/cgit/zuul/commit/?id=ffe7278c08e6e36bf8b18f732c764e00ff51551e.