An issue has been found in PowerDNS Recursor before 4.1.18, 4.2.x before 4.2.5, and 4.3.x before 4.3.5. A remote attacker can cause the cached records for a given name to be updated to the Bogus DNSSEC validation state, instead of their actual DNSSEC Secure state, via a DNS ANY query. This results in a denial of service for installation that always validate (dnssec=validate), and for clients requesting validation when on-demand validation is enabled (dnssec=process).
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Recursor | Powerdns | * | 4.1.18 (excluding) |
| Recursor | Powerdns | 4.2.0 (including) | 4.2.5 (excluding) |
| Recursor | Powerdns | 4.3.0 (including) | 4.3.5 (excluding) |
| Pdns-recursor | Ubuntu | bionic | * |
| Pdns-recursor | Ubuntu | groovy | * |
| Pdns-recursor | Ubuntu | trusty | * |
| Pdns-recursor | Ubuntu | xenial | * |