CVE-2020-8622

NameCVE-2020-8622
DescriptionIn BIND 9.0.0 -> 9.11.21, 9.12.0 -> 9.16.5, 9.17.0 -> 9.17.3, also affects 9.9.3-S1 -> 9.11.21-S1 of the BIND 9 Supported Preview Edition, An attacker on the network path for a TSIG-signed request, or operating the server receiving the TSIG-signed request, could send a truncated response to that request, triggering an assertion failure, causing the server to exit. Alternately, an off-path attacker would have to correctly guess when a TSIG-signed request was sent, along with other characteristics of the packet and message, and spoof a truncated response to trigger an assertion failure, causing the server to exit.
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)
ReferencesDLA-2355-1, DSA-4752-1
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+deb9u6vulnerable
stretch (security)1:9.10.3.dfsg.P4-12.3+deb9u7fixed
buster1:9.11.5.P4+dfsg-5.1+deb10u1vulnerable
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
bind9sourcestretch1:9.10.3.dfsg.P4-12.3+deb9u7DLA-2355-1
bind9sourcebuster1:9.11.5.P4+dfsg-5.1+deb10u2DSA-4752-1
bind9source(unstable)1:9.16.6-1

Notes

https://kb.isc.org/docs/cve-2020-8622
https://gitlab.isc.org/isc-projects/bind9/commit/0eec632d6a5a474280017ec949d8a8014612f3b3 (v9_16_6)
https://gitlab.isc.org/isc-projects/bind9/commit/6ed167ad0a647dff20c8cb08c944a7967df2d415 (v9_11_22)

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