CVE-2019-19331

Name	CVE-2019-19331
Description	knot-resolver before version 4.3.0 is vulnerable to denial of service through high CPU utilization. DNS replies with very many resource records might be processed very inefficiently, in extreme cases taking even several CPU seconds for each such uncached message. For example, a few thousand A records can be squashed into one DNS message (limit is 64kB).
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
Debian Bugs	946181

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
knot-resolver (PTS)	buster	3.2.1-3	vulnerable
	buster (security)	3.2.1-3+deb10u1	vulnerable
	bullseye	5.3.1-1+deb11u1	fixed
	bookworm, sid	5.6.0-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
knot-resolver	source	(unstable)	5.0.1-1			946181

[buster] - knot-resolver <no-dsa> (Minor issue; can be fixed via point release)
https://www.openwall.com/lists/oss-security/2019/12/04/4