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PowerDNS before 2.9.18, when allowing recursion to a restricted range of IP addresses, does not properly handle questions from clients that are denied recursion, which could cause a "blank out" of answers to those clients that are allowed to use recursion.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade pdns | Jul 30, 2024 | Jul 19, 2005 |
| Freebsd | — | Upgrade powerdns | Dec 10, 2025 | Jul 21, 2005 |
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