{"id":"DEBIAN-CVE-2026-71193","details":"In OpenStack Designate before 22.0.1, zone creation checks (_is_subzone, _is_superzone, and the duplicate-zone DB constraint) are scoped to the target pool only. An authenticated user can bypass these checks by scheduling a zone to a different pool via the AttributeFilter scheduler, creating an overlapping zone that conflicts with another tenant's zone. This enables cross-tenant DNS hijack (redirecting traffic to attacker-controlled IPs) and DNS denial of service (NODATA responses). Exploitation requires a multi-pool deployment with AttributeFilter enabled in scheduler_filters, which is a non-default but documented and supported configuration for self-service tiering.","modified":"2026-09-10T08:47:27.595246149Z","published":"2026-08-12T23:17:22.030Z","upstream":["CVE-2026-71193"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-71193"}],"affected":[{"package":{"name":"designate","ecosystem":"Debian:12","purl":"pkg:deb/debian/designate?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:15.0.2-0+deb11u1"}]}],"versions":["1:15.0.0-4"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-71193.json"}},{"package":{"name":"designate","ecosystem":"Debian:13","purl":"pkg:deb/debian/designate?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:20.0.0-2+deb13u1"}]}],"versions":["1:20.0.0-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-71193.json"}},{"package":{"name":"designate","ecosystem":"Debian:14","purl":"pkg:deb/debian/designate?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:22.0.0-2"}]}],"versions":["1:20.0.0-2","1:21.0.0-1","1:21.0.0-2","1:21.0.0~rc1-1","1:21.0.0~rc1-2","1:21.0.0~rc1-3","1:21.0.0~rc1-4","1:22.0.0-1","1:22.0.0~rc1-1","1:22.0.0~rc1-2","1:22.0.0~rc1-3"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-71193.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H"}]}