Description (CNA)
In OpenStack Designate before 22.0.2, the mDNS handler performs pool-blind lookups when resolving record queries and NOTIFY requests. When two zones with the same name exist across different pools, the lookup fails with a deterministic error, causing the handler to return REFUSED for all DNS queries through that path. The _handle_notify path is exploitable via a single unauthenticated UDP packet. This is independently reachable through the cross-tenant zone overlap described in a different recent CVE, and also affects legitimate same-tenant cross-pool configurations. BIND9 views do not mitigate this issue as mDNS is a shared service upstream of any view configuration.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| OpenStack / Designate | affected 1.0.0 before 20.0.2; affected 21.0.0 before 21.0.1; affected 22.0.0 before 22.0.2 |
CWE
CWE-669
References
- 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
ADP enrichment
No English description supplied.
No references supplied.