CVE-2021-25214

Name	CVE-2021-25214
Description	In BIND 9.8.5 -> 9.8.8, 9.9.3 -> 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 9 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 malformed IXFR triggering the flaw described above, the named process will terminate due to a failed assertion the next time the transferred secondary zone is refreshed.
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)
References	DLA-2647-1, DSA-4909-1
Debian Bugs	987741

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
bind9 (PTS)	buster	1:9.11.5.P4+dfsg-5.1+deb10u7	fixed
	buster (security)	1:9.11.5.P4+dfsg-5.1+deb10u8	fixed
	bullseye (security), bullseye	1:9.16.37-1~deb11u1	fixed
	bookworm	1:9.18.12-1	fixed
	sid	1:9.18.13-1	fixed

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

Package	Type	Release	Fixed Version	Origin	Debian Bugs
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		987741

Notes

https://kb.isc.org/docs/cve-2021-25214
https://gitlab.isc.org/isc-projects/bind9/commit/f68d4cba3321ed375bbc334e2333250893c4f587 (v9_16_15)
https://gitlab.isc.org/isc-projects/bind9/commit/f092fcee10a7e8b391747dbdd7e58243bff4f75c (v9_16_15)
https://gitlab.isc.org/isc-projects/bind9/commit/01a916abac22f87a248a7525d3e7408acac0804b (v9_16_15)