CVE-2020-25829
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (6.54%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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).
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 6.54% probability · 94th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Affected
- powerdns/recursor · opensuse/backports sle · opensuse/leap
- Source
- cve@mitre.org
EPSS 6.5% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00036.htmlThird Party Advisory
- https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2020-07.htmlVendor Advisory
- https://security.gentoo.org/glsa/202012-19Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00036.htmlThird Party Advisory
- https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2020-07.htmlVendor Advisory
- https://security.gentoo.org/glsa/202012-19Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.