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CVE-2020-8621

Published: 20 August 2020

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.

Notes

Author	Note
alexmurray	Affects versions 9.14.0 -> 9.16.5, 9.17.0 -> 9.17.3

Priority

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package	Release	Status
bind9 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (code not present)
	focal	Released (1:9.16.1-0ubuntu2.3)
	trusty	Not vulnerable (code not present)
	upstream	Needs triage
	xenial	Not vulnerable (code not present)

Severity score breakdown

Parameter	Value
Base score	7.5
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

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