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. 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.

CVSS v3 9.6 CRITICAL

9.6^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.1 / Impact : 5.8

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://launchpad.net/bugs/2160533
https://security.openstack.org/ossa/OSSA-2026-034.html
https://www.openwall.com/lists/oss-security/2026/08/11/6

Configurations

No configuration.

History

23 Oct 2026, 19:10

Type	Values Removed	Values Added
Summary		(es) En OpenStack Designate antes de 22.0.1, las comprobaciones de creación de zonas (_is_subzone, _is_superzone, y la restricción de base de datos de zona duplicada) están limitadas solo al pool de destino. Un usuario autenticado puede eludir estas comprobaciones programando una zona a un pool diferente a través del planificador AttributeFilter, creando una zona superpuesta que entra en conflicto con la zona de otro inquilino. Esto permite el secuestro de DNS entre inquilinos (redirigiendo el tráfico a IPs controladas por el atacante) y la denegación de servicio de DNS (respuestas NODATA). La explotación requiere una implementación de múltiples pools con AttributeFilter habilitado en scheduler_filters, lo cual es una configuración no predeterminada pero documentada y soportada para la estratificación de autoservicio.

Information

Published : 2026-08-12 23:17

Updated : 2026-10-24 15:10

NVD link : CVE-2026-71193

Mitre link : CVE-2026-71193

CVE.ORG link : CVE-2026-71193

JSON object : View

Products Affected

No product.

CWE

CWE-863

Incorrect Authorization

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