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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).
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade pdns-recursor | Oct 22, 2020 | Oct 16, 2020 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Oct 16, 2020 |
| Debian | — | Upgrade pdns-recursor | Jul 3, 2024 | Oct 16, 2020 |
| Freebsd | — | Upgrade powerdns-recursor | Dec 10, 2025 | Oct 14, 2020 |
| Gentoo Linux | — | Upgrade net-dns/pdns-recursor. | Dec 29, 2020 | Oct 16, 2020 |
| Suse | — | Upgrade pdns-recursor | May 11, 2021 | Oct 16, 2020 |
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