CVE-2020-25829

Name	CVE-2020-25829
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).
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-3855-1
Debian Bugs	972159

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
pdns-recursor (PTS)	bullseye	4.4.2-3	fixed
	bookworm, bookworm (security)	4.8.8-1+deb12u1	fixed
	trixie	5.2.4-2	fixed
	forky, sid	5.3.0-5	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
pdns-recursor	source	buster	4.1.11-1+deb10u2		DLA-3855-1
pdns-recursor	source	(unstable)	4.3.5-1			972159

Notes

[buster] - pdns-recursor <no-dsa> (Minor issue)
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2020-07.html
https://github.com/PowerDNS/pdns/commit/77409aab0be43071b365760213894d6388c3df30 (rec-4.1.18)