CVE-2021-25215

Name	CVE-2021-25215
Description	In BIND 9.0.0 -> 9.11.29, 9.12.0 -> 9.16.13, and versions BIND 9.9.3-S1 -> 9.11.29-S1 and 9.16.8-S1 -> 9.16.13-S1 of BIND Supported Preview Edition, as well as release versions 9.17.0 -> 9.17.11 of the BIND 9.17 development branch, when a vulnerable version of named receives a query for a record triggering the flaw described above, the named process will terminate due to a failed assertion check. The vulnerability affects all currently maintained BIND 9 branches (9.11, 9.11-S, 9.16, 9.16-S, 9.17) as well as all other versions of BIND 9.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-2647-1, DSA-4909-1, ELA-418-1
Debian Bugs	987742

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
bind9 (PTS)	jessie, jessie (lts)	1:9.9.5.dfsg-9+deb8u30	fixed
	stretch (security)	1:9.10.3.dfsg.P4-12.3+deb9u12	fixed
	stretch (lts), stretch	1:9.10.3.dfsg.P4-12.3+deb9u15	fixed
	buster	1:9.11.5.P4+dfsg-5.1+deb10u7	fixed
	buster (security)	1:9.11.5.P4+dfsg-5.1+deb10u10	fixed
	bullseye	1:9.16.44-1~deb11u1	fixed
	bullseye (security)	1:9.16.48-1	fixed
	bookworm	1:9.18.19-1~deb12u1	fixed
	bookworm (security)	1:9.18.24-1	fixed
	sid, trixie	1:9.19.21-1	fixed

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

Package	Type	Release	Fixed Version	Origin	Debian Bugs
bind9	source	jessie	1:9.9.5.dfsg-9+deb8u22	ELA-418-1
bind9	source	stretch	1:9.10.3.dfsg.P4-12.3+deb9u9	DLA-2647-1
bind9	source	buster	1:9.11.5.P4+dfsg-5.1+deb10u5	DSA-4909-1
bind9	source	(unstable)	1:9.16.15-1		987742

https://kb.isc.org/docs/cve-2021-25215
https://gitlab.isc.org/isc-projects/bind9/commit/dde958717c9bfdc8679764c045c226e3a1468334 (v9_16_15)