CVE-2020-8619

Name	CVE-2020-8619
Description	In ISC BIND9 versions BIND 9.11.14 -> 9.11.19, BIND 9.14.9 -> 9.14.12, BIND 9.16.0 -> 9.16.3, BIND Supported Preview Edition 9.11.14-S1 -> 9.11.19-S1: Unless a nameserver is providing authoritative service for one or more zones and at least one zone contains an empty non-terminal entry containing an asterisk ("*") character, this defect cannot be encountered. A would-be attacker who is allowed to change zone content could theoretically introduce such a record in order to exploit this condition to cause denial of service, though we consider the use of this vector unlikely because any such attack would require a significant privilege level and be easily traceable.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DSA-4752-1

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~deb11u1	fixed
	bookworm, bookworm (security)	1:9.18.28-1~deb12u2	fixed
	sid, trixie	1:9.20.3-1	fixed

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

Package	Type	Release	Fixed Version	Origin
bind9	source	jessie	(not affected)
bind9	source	stretch	(not affected)
bind9	source	buster	1:9.11.5.P4+dfsg-5.1+deb10u2	DSA-4752-1
bind9	source	(unstable)	1:9.16.4-1

Notes

[stretch] - bind9 <not-affected> (Vulnerable code introduced later)
[jessie] - bind9 <not-affected> (Vulnerable code introduced later)
https://kb.isc.org/docs/cve-2020-8619
https://gitlab.isc.org/isc-projects/bind9/-/issues/1718
https://gitlab.isc.org/isc-projects/bind9/commit/0854f631149848b64cc193979d0b0edf39159330 (v9_17_3)
https://gitlab.isc.org/isc-projects/bind9/commit/90a7416d1599df7aa1cdfac33b2da9352eeec4b0 (v9_11_21)