CVE-2021-25218

Name	CVE-2021-25218
Description	In BIND 9.16.19, 9.17.16. Also, version 9.16.19-S1 of BIND Supported Preview Edition When a vulnerable version of named receives a query under the circumstances described above, the named process will terminate due to a failed assertion check. The vulnerability affects only BIND 9 releases 9.16.19, 9.17.16, and release 9.16.19-S1 of the BIND Supported Preview Edition.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
bind9 (PTS)	bullseye	1:9.16.50-1~deb11u2	fixed
	bullseye (security)	1:9.16.50-1~deb11u3	fixed
	bookworm	1:9.18.33-1~deb12u2	fixed
	bookworm (security)	1:9.18.41-1~deb12u1	fixed
	trixie	1:9.20.11-4	fixed
	trixie (security)	1:9.20.15-1~deb13u1	fixed
	forky, sid	1:9.20.15-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
bind9	source	(unstable)	(not affected)

- bind9 <not-affected> (Vulnerable code introduced later)
https://kb.isc.org/docs/cve-2021-25218