CVE-2020-8621
High
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.
Exploit probability
3.0%
Published
August 21, 2020
Required by
Not available
Last source change
August 7, 2026
02 / AFFECTED SOFTWARE
Affected packages
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
Open Source Vulnerabilities
CVE-2020-8621
View original source
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.
05 / REFERENCES
Further evidence
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.html
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.html
- https://kb.isc.org/docs/cve-2020-8621
- https://security.gentoo.org/glsa/202008-19
- https://security.netapp.com/advisory/ntap-20200827-0003/
- https://usn.ubuntu.com/4468-1/
- https://www.synology.com/security/advisory/Synology_SA_20_19