Description
A remote attacker might be able to cause infinite recursion in PowerDNS Recursor 4.8.0 via a DNS query that retrieves DS records for a misconfigured domain, because QName minimization is used in QM fallback mode. This is fixed in 4.8.1.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | pdns-recursor | 4.8.1-1 | — |
| Debian 13 | pdns-recursor | 4.8.1-1 | — |
| Debian 12 | pdns-recursor | 4.8.1-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 22.04 LTS | pdns-recursor | No fix yet | — |
| Ubuntu Pro 20.04 LTS | pdns-recursor | No fix yet | — |
| Ubuntu Pro 18.04 LTS | pdns-recursor | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | pdns-recursor | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | pdns-recursor | 4.8.1-1.1 | openSUSE-SU-2024:12628-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | pdns-recursor | 4.8.1-r0 | — |
| Alpine v3.23 | pdns-recursor | 4.8.1-r0 | — |
| Alpine v3.22 | pdns-recursor | 4.8.1-r0 | — |
| Alpine v3.21 | pdns-recursor | 4.8.1-r0 | — |
| Alpine v3.20 | pdns-recursor | 4.8.1-r0 | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | pdns-recursor | 4.8.1-r0 | — |
| Alpine v3.18 | pdns-recursor | 4.8.1-r0 | — |
Advisories 2
- openSUSE-SU-2024:12628-1 pdns-recursor-4.8.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2023-0171 PowerDNS: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Jan 22, 2023