Is CVE-2020-8622 in the CISA KEV catalog?

No. CVE-2020-8622 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-8622?

CVE-2020-8622 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2020-8622?

CVE-2020-8622 has an EPSS score of 5.54% (92th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-8622?

Upgrade bind9 on debian 11 to 1:9.16.6-1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2020-8622

MEDIUMEPSS 92th pctl

6.5

CVSS v3

NVD

Description

In BIND 9.0.0 -> 9.11.21, 9.12.0 -> 9.16.5, 9.17.0 -> 9.17.3, also affects 9.9.3-S1 -> 9.11.21-S1 of the BIND 9 Supported Preview Edition, An attacker on the network path for a TSIG-signed request, or operating the server receiving the TSIG-signed request, could send a truncated response to that request, triggering an assertion failure, causing the server to exit. Alternately, an off-path attacker would have to correctly guess when a TSIG-signed request was sent, along with other characteristics of the packet and message, and spoof a truncated response to trigger an assertion failure, causing the server to exit.

CWE-617

How to fix

Remediation Available

bind9Debian

Fixed in:1:9.16.6-1CVE-2020-8622

bind9Ubuntu

Fixed in:1:9.9.5.dfsg-3ubuntu0.19+esm3USN-4468-2

Fixed in:1:9.10.3.dfsg.P4-8ubuntu1.17USN-4468-1

Fixed in:1:9.11.3+dfsg-1ubuntu1.13USN-4468-1

Fixed in:1:9.16.1-0ubuntu2.3USN-4468-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

5.54%probability of exploitation in 30 days

92ndpercentile

High risk: more likely to be exploited than 92% of all known CVEs.

References

Patch1

oracle.com

Vendor Advisory1

kb.isc.org

Third-Party Advisory9

Other references2

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.