CVE-2020-8621

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.

• CWE-617

• http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.htmlMailing List, Third Party Advisory
• https://kb.isc.org/docs/cve-2020-8621Vendor Advisory
• https://security.gentoo.org/glsa/202008-19Third Party Advisory
• https://security.netapp.com/advisory/ntap-20200827-0003/Third Party Advisory
• https://usn.ubuntu.com/4468-1/Third Party Advisory
• https://www.synology.com/security/advisory/Synology_SA_20_19Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.htmlMailing List, Third Party Advisory
• https://kb.isc.org/docs/cve-2020-8621Vendor Advisory
• https://security.gentoo.org/glsa/202008-19Third Party Advisory
• https://security.netapp.com/advisory/ntap-20200827-0003/Third Party Advisory
• https://usn.ubuntu.com/4468-1/Third Party Advisory
• https://www.synology.com/security/advisory/Synology_SA_20_19Third Party Advisory

Published

Aug 21, 2020

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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• CVE-2020-8618An attacker who is permitted to send zone data to a server v…4.9
• CVE-2020-8619In ISC BIND9 versions BIND 9.11.14 -> 9.11.19, BIND 9.14.9 -…4.9
• CVE-2020-8620In BIND 9.15.6 -> 9.16.5, 9.17.0 -> 9.17.3, An attacker who …7.5
• CVE-2020-8622In BIND 9.0.0 -> 9.11.21, 9.12.0 -> 9.16.5, 9.17.0 -> 9.17.3…6.5
• CVE-2020-8623In BIND 9.10.0 -> 9.11.21, 9.12.0 -> 9.16.5, 9.17.0 -> 9.17.…7.5
• CVE-2020-8624In BIND 9.9.12 -> 9.9.13, 9.10.7 -> 9.10.8, 9.11.3 -> 9.11.2…4.3
• CVE-2020-8625BIND servers are vulnerable if they are running an affected …8.1
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• CVE-2020-8627Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. Reason: T…