CVE catalog
CVE-2020-25829
pdns-recursor: CVE-2020-25829
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 6.54% · Oct 25, 2026
An issue has been found in PowerDNS Recursor before 4.1.18, 4.2.x before 4.2.5, and 4.3.x before 4.3.5. A remote attacker can cause the cached records for a given name to be updated to the Bogus DNSSEC validation state, instead of their actual DNSSEC Secure state, via a DNS ANY query. This results in a denial of service for installation that always validate (dnssec=validate), and for clients requesting validation when on-demand validation is enabled (dnssec=process).
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | pdns-recursor | sid | 5.4.9-1 | fixed |
| Debian | pdns-recursor | forky | 5.4.8-1 | fixed |
| Debian | pdns-recursor | trixie | 5.2.13-0+deb13u1 | fixed |
| Debian | pdns-recursor | trixie-security | 5.2.13-0+deb13u1 | fixed |
| Debian | pdns-recursor | bookworm | 4.8.8-1+deb12u1 | fixed |
| Debian | pdns-recursor | bookworm-security | 4.8.8-1+deb12u1 | fixed |
| Ubuntu | pdns-recursor | pro | 4.2.0-6 | vulnerable |
| Ubuntu | pdns-recursor | pro | 4.2.1-1 | vulnerable |
| Ubuntu | pdns-recursor | pro | 4.2.1-1build1 | vulnerable |
| Ubuntu | pdns-recursor | pro | 4.2.1-1build2 | vulnerable |
| Ubuntu | pdns-recursor | pro | 4.2.1-1ubuntu0.1~esm1 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | pdns-recursor | source | sid | 4.3.5-1 | not yet assigned | Not reported | [972159] |
| Debian | pdns-recursor | source | forky | 4.3.5-1 | not yet assigned | Not reported | [972159] |
| Debian | pdns-recursor | source | trixie | 4.3.5-1 | not yet assigned | Not reported | [972159] |
| Debian | pdns-recursor | source | bookworm | 4.3.5-1 | not yet assigned | Not reported | [972159] |
OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
[Debian 12 (Bookworm)]
- [pdns-recursor]Unknown
Details (4)
4.8.8-1+deb12u1· amd64 · bookwormFixed · Fixed:
4.3.5-1dsa · pdns-recursor · debian · bookworm; dsa · pdns-recursor · debian · 12
4.8.8-1+deb12u1· arm64 · bookwormFixed · Fixed:
4.3.5-1dsa · pdns-recursor · debian · bookworm; dsa · pdns-recursor · debian · 12
4.8.8-1+deb12u1· amd64 · bookworm-securityFixed · Fixed:
4.3.5-1dsa · pdns-recursor · debian · bookworm; dsa · pdns-recursor · debian · 12
4.8.8-1+deb12u1· arm64 · bookworm-securityFixed · Fixed:
4.3.5-1dsa · pdns-recursor · debian · bookworm; dsa · pdns-recursor · debian · 12
[Debian 13 (Trixie)]
- [pdns-recursor]Unknown
Details (4)
5.2.11-0+deb13u1· amd64 · trixieFixed · Fixed:
4.3.5-1dsa · pdns-recursor · debian · 13
5.2.11-0+deb13u1· arm64 · trixieFixed · Fixed:
4.3.5-1dsa · pdns-recursor · debian · 13
5.2.13-0+deb13u1· amd64 · trixie-securityFixed · Fixed:
4.3.5-1dsa · pdns-recursor · debian · 13
5.2.13-0+deb13u1· arm64 · trixie-securityFixed · Fixed:
4.3.5-1dsa · pdns-recursor · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2020_1687-1.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2020-25829]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2020-25829]
- [https://security-tracker.debian.org/tracker/CVE-2020-25829]
- [https://wid.cert-bund.de/.well-known/csaf/white/2020/wid-sec-w-2024-1478.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]