CVE-2020-8621

NameCVE-2020-8621
DescriptionIn BIND 9.14.0 -> 9.16.5, 9.17.0 -> 9.17.3, If a server is configured with both QNAME minimization and 'forward first' then an attacker who can send queries to it may be able to trigger the condition that will cause the server to crash. Servers that 'forward only' are not affected.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
bind9 (PTS)stretch1:9.10.3.dfsg.P4-12.3+deb9u6fixed
stretch (security)1:9.10.3.dfsg.P4-12.3+deb9u7fixed
buster, buster (security)1:9.11.5.P4+dfsg-5.1+deb10u2fixed
bullseye, sid1:9.16.6-3fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
bind9sourcestretch(not affected)
bind9sourcebuster(not affected)
bind9source(unstable)1:9.16.6-1

Notes

[buster] - bind9 <not-affected> (Vulnerable code introduced in 9.14.x)
[stretch] - bind9 <not-affected> (Vulnerable code introduced in 9.14.x)
https://kb.isc.org/docs/cve-2020-8621
https://gitlab.isc.org/isc-projects/bind9/commit/81514ff925dfc6e0c293745e0fc8320a8af95586 (v9_16_6)

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