Description
An issue has been found in PowerDNS Recursor versions 4.1.x before 4.1.9 where records in the answer section of responses received from authoritative servers with the AA flag not set were not properly validated, allowing an attacker to bypass DNSSEC validation.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Power DNS | pdns-recursor | versions 4.1.x before 4.1.9 | — |
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 | 4.1.9-1 | — |
| Debian 13 | pdns-recursor | 4.1.9-1 | — |
| Debian 12 | pdns-recursor | 4.1.9-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| 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 | pdns-recursor | 4.1.2-bp150.2.6.1 | openSUSE-SU-2019:0107-1 |
| SUSE Package Hub 12 SP1 | pdns-recursor | 4.1.10-16.1 | openSUSE-SU-2019:0131-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | pdns-recursor | 4.5.5-1.3 | openSUSE-SU-2024:11157-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | pdns-recursor | 4.1.9-r0 | — |
| Alpine v3.23 | pdns-recursor | 4.1.9-r0 | — |
| Alpine v3.22 | pdns-recursor | 4.1.9-r0 | — |
| Alpine v3.21 | pdns-recursor | 4.1.9-r0 | — |
| Alpine v3.20 | pdns-recursor | 4.1.9-r0 | — |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | pdns-recursor | 4.1.9-r0 | — |
| Alpine v3.18 | pdns-recursor | 4.1.9-r0 | — |
| Alpine v3.17 | pdns-recursor | 4.1.9-r0 | — |
| Alpine v3.16 | pdns-recursor | 4.1.9-r0 | — |
| Alpine v3.15 | pdns-recursor | 4.1.9-r0 | — |
| Alpine v3.14 | pdns-recursor | 4.1.9-r0 | — |
| Alpine v3.13 | pdns-recursor | 4.1.9-r0 | — |
| Alpine v3.12 | pdns-recursor | 4.1.9-r0 | — |
| Alpine v3.11 | pdns-recursor | 4.1.9-r0 | — |
| Alpine v3.10 | pdns-recursor | 4.1.9-r0 | — |
| Alpine v3.9 | pdns-recursor | 4.1.9-r0 | — |
| Alpine v3.8 | pdns-recursor | 4.1.9-r0 | — |
Advisories 3
- openSUSE-SU-2019:0107-1 Security update for pdns-recursor SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:0131-1 Security update for pdns-recursor SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11157-1 pdns-recursor-4.5.5-1.3 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026