CVE
DEBIAN-CVE-2026-71193
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.
In OpenStack Designate before 22.0.1, zone creation checks (issubzone, issuperzone, 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.
Package Versions Affected
Package Version
patch Availability
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CVSS Version
Severity
Base Score
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Score Vector
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3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H
C
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Related Resources
No items found.
References
https://security-tracker.debian.org/tracker/CVE-2026-71193