In Ceph before 12.2.3 and 13.x through 13.0.1, the rgw_civetweb.cc RGWCivetWeb::init_env function in radosgw doesn’t handle malformed HTTP headers properly, allowing for denial of service.
tracker.ceph.com/issues/23039
access.redhat.com/errata/RHSA-2018:0546
access.redhat.com/errata/RHSA-2018:0548
bugzilla.redhat.com/show_bug.cgi?id=1546611
github.com/ceph/ceph/pull/20488
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/74VI6EPZ6LD2O4JJXJBTYQ4U4VUO2ZDO/