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 · 93th percentile
- CISA KEV
- Not listed
- Affected
- powerdns/recursor · opensuse/backports sle · opensuse/leap
- Source
- cve@mitre.org
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. Refreshed daily.