An attacker can publish a zone containing specific Resource Record Sets. Processing and caching results for these sets can lead to an illegal memory accesses and crash of the Recursor, causing a denial of service.
The remedy is: upgrade to the patched 5.2.1 version.
We would like to thank Volodymyr Ilyin for bringing this issue to our attention.
CVSS Details
- CVSS 3.1 Base Score: 7.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade pdns-recursor | Aug 8, 2025 | Apr 7, 2025 |
| Debian | — | Upgrade pdns-recursor | Jul 23, 2026 | Jul 23, 2026 |
| Freebsd | — | Upgrade powerdns-recursor | May 2, 2025 | Apr 22, 2025 |
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