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.

CVSS v3.0 7.5 HIGH
CVSS v2.0 4.3 MEDIUM

7.5^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

4.3^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:N/C:N/I:N/A:P

Exploitability : 8.6 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://kb.isc.org/docs/cve-2020-8621	Vendor Advisory
https://security.netapp.com/advisory/ntap-20200827-0003/	Third Party Advisory
https://usn.ubuntu.com/4468-1/	Third Party Advisory
https://security.gentoo.org/glsa/202008-19	Third Party Advisory
https://www.synology.com/security/advisory/Synology_SA_20_19	Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.html	Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.html	Mailing List Third Party Advisory

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Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:isc:bind::::::::
	cpe:2.3:a:isc:bind::::::::

Configuration 2 (hide)

OR	cpe:2.3:o:opensuse:leap:15.1:::::::*
	cpe:2.3:o:opensuse:leap:15.2:::::::*

Configuration 3 (hide)

OR	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:::

Configuration 4 (hide)

cpe:2.3:a:synology:dns_server:*:*:*:*:*:*:*:*

Configuration 5 (hide)

cpe:2.3:a:netapp:steelstore_cloud_integrated_storage:-:*:*:*:*:*:*:*

Information

Published : 2020-08-21 14:15

Updated : 2022-04-28 11:27

NVD link : CVE-2020-8621

Mitre link : CVE-2020-8621

JSON object : View

CWE

CWE-617

Reachable Assertion

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Products Affected

netapp

steelstore_cloud_integrated_storage

canonical

ubuntu_linux

synology

dns_server

opensuse

leap

isc

bind

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