| Name | CVE-2020-8621 |
| Description | In 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
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+deb8u31 | fixed |
| stretch (security) | 1:9.10.3.dfsg.P4-12.3+deb9u12 | fixed |
| stretch (lts), stretch | 1:9.10.3.dfsg.P4-12.3+deb9u16 | fixed |
| buster, buster (lts) | 1:9.11.5.P4+dfsg-5.1+deb10u13 | fixed |
| buster (security) | 1:9.11.5.P4+dfsg-5.1+deb10u11 | fixed |
| bullseye | 1:9.16.50-1~deb11u2 | fixed |
| bullseye (security) | 1:9.16.50-1~deb11u1 | fixed |
| bookworm (security), bookworm | 1:9.18.28-1~deb12u2 | fixed |
| sid, trixie | 1:9.20.2-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| bind9 | source | jessie | (not affected) | | | |
| bind9 | source | stretch | (not affected) | | | |
| bind9 | source | buster | (not affected) | | | |
| bind9 | source | (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)
[jessie] - bind9 <not-affected> (Vulnerable code introduced 9.14)