Description
A crafted response from an upstream server the recursor has been configured to forward-recurse to can cause a Denial of Service in the Recursor. The default configuration of the Recursor does not use recursive forwarding and is not affected.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| PowerDNS | Recursor | 4.8.7, 4.9.4, 5.0.3 | — |
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 | 4.9.5-1 | — |
| Debian 13 | pdns-recursor | 4.9.5-1 | — |
| Debian 12 | pdns-recursor | 4.8.8-1 | DSA-5674-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | pdns-recursor | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| 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 | — |
| Ubuntu Pro 16.04 LTS | pdns-recursor | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 15 SP5 | pdns-recursor | 4.8.8-bp155.2.6.1 | openSUSE-SU-2024:0114-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | pdns-recursor | 5.0.4-1.1 | openSUSE-SU-2024:13901-1 |
| openSUSE Leap 15.5 | pdns-recursor | 4.8.8-bp155.2.6.1 | openSUSE-SU-2024:0114-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | pdns-recursor | 5.0.4-r0 | — |
| Alpine v3.23 | pdns-recursor | 5.0.4-r0 | — |
| Alpine v3.22 | pdns-recursor | 5.0.4-r0 | — |
| Alpine v3.21 | pdns-recursor | 5.0.4-r0 | — |
| Alpine v3.20 | pdns-recursor | 5.0.4-r0 | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | pdns-recursor | 4.9.5-r0 | — |
Advisories 4
- DSA-5674-1 pdns-recursor - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:0114-1 Security update for pdns-recursor SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13901-1 pdns-recursor-5.0.4-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2024-0971 PowerDNS: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Apr 28, 2024