Security readout for executives and security teams
CVE-2020-8622 is a denial-of-service flaw in ISC BIND 9. A malformed truncated response to a TSIG-signed DNS request can crash the DNS server process. The business impact is service availability: DNS outages can disrupt applications, mail, VPN, and internal name resolution. Exposure is most likely where BIND 9 uses TSIG-signed DNS traffic, such as trusted server-to-server DNS operations. The named affected ranges include 9.0.0-9.11.21, 9.12.0-9.16.5, 9.17.0-9.17.3, and supported preview 9.9.3-S1-9.11.21-S1. Treat as a moderate availability risk. Patch exposed or business-critical DNS infrastructure on the normal security maintenance track, with faster handling for TSIG-heavy environments or DNS servers supporting critical production services. Mitigation focus: Inventory BIND 9 versions against the affected ranges.; Apply ISC or operating-system vendor security updates for CVE-2020-8622.; Prioritize DNS servers using TSIG-signed server-to-server traffic..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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CVE-2020-8622 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
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CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H2.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://kb.isc.org/docs/cve-2020-8622CVE reference · x_refsource_CONFIRM
- FEDORA-2020-a02b7a0f21CVE reference · vendor-advisory, x_refsource_FEDORA
- USN-4468-1CVE reference · vendor-advisory, x_refsource_UBUNTU
- USN-4468-2CVE reference · vendor-advisory, x_refsource_UBUNTU
- DSA-4752CVE reference · vendor-advisory, x_refsource_DEBIAN
- FEDORA-2020-14c194e5afCVE reference · vendor-advisory, x_refsource_FEDORA
- [debian-lts-announce] 20200829 [SECURITY] [DLA 2355-1] bind9 security updateCVE reference · mailing-list, x_refsource_MLIST
- GLSA-202008-19CVE reference · vendor-advisory, x_refsource_GENTOO
- https://www.oracle.com/security-alerts/cpuoct2021.htmlCVE reference · x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20200827-0003/CVE reference · x_refsource_CONFIRM
- https://www.synology.com/security/advisory/Synology_SA_20_19CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.