{"id":"CVE-2020-8621","details":"In BIND 9.14.0 -\u003e 9.16.5, 9.17.0 -\u003e 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.","modified":"2026-05-18T05:53:29.157242377Z","published":"2020-08-21T21:15:12.167Z","related":["CGA-h7j4-xm87-743m","SUSE-SU-2020:2914-1","openSUSE-SU-2020:1699-1","openSUSE-SU-2020:1701-1","openSUSE-SU-2024:10650-1"],"database_specific":{"unresolved_ranges":[{"extracted_events":[{"last_affected":"16.04"},{"last_affected":"18.04"},{"last_affected":"20.04"}],"source":"CPE_FIELD","cpes":["cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*","cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*","cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*"],"vendor_product":"canonical:ubuntu_linux"},{"extracted_events":[{"last_affected":"15.1"},{"last_affected":"15.2"}],"source":"CPE_FIELD","cpes":["cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*","cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*"],"vendor_product":"opensuse:leap"},{"extracted_events":[{"fixed":"2.2.2-5027"}],"source":"CPE_FIELD","cpes":["cpe:2.3:a:synology:dns_server:*:*:*:*:*:*:*:*"],"vendor_product":"synology:dns_server"}]},"references":[{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.html"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.html"},{"type":"ADVISORY","url":"https://kb.isc.org/docs/cve-2020-8621"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202008-19"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20200827-0003/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4468-1/"},{"type":"ADVISORY","url":"https://www.synology.com/security/advisory/Synology_SA_20_19"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/isc-projects/bind9","events":[{"introduced":"d1e053ed8dff25af8af241cf5ee2c83bd41a25ad"},{"last_affected":"c00b4586ab21960bc2b13989f77ea8465e989187"},{"introduced":"04ca7cc4b6993f47ea61852c759d047c83be7b3f"},{"last_affected":"079e9baebe7d2b42610b9d7bdc0f8a5f78bbe2d5"}],"database_specific":{"extracted_events":[{"introduced":"9.14.0"},{"last_affected":"9.16.5"},{"introduced":"9.17.0"},{"last_affected":"9.17.3"}],"source":"CPE_FIELD","cpe":"cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*"}}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2020-8621.json"}},{"ranges":[{"type":"GIT","repo":"https://gitlab.isc.org/isc-projects/bind9","events":[{"introduced":"d1e053ed8dff25af8af241cf5ee2c83bd41a25ad"},{"last_affected":"c00b4586ab21960bc2b13989f77ea8465e989187"},{"introduced":"04ca7cc4b6993f47ea61852c759d047c83be7b3f"},{"last_affected":"079e9baebe7d2b42610b9d7bdc0f8a5f78bbe2d5"}],"database_specific":{"extracted_events":[{"introduced":"9.14.0"},{"last_affected":"9.16.5"},{"introduced":"9.17.0"},{"last_affected":"9.17.3"}],"source":"CPE_FIELD","cpe":"cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*"}}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2020-8621.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}