CVE-2020-8621
7.5 · HIGHOverview
CVE-2020-8621 is a high-severity vulnerability affecting isc bind. It was published on August 21, 2020 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
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.
Remediation
Check the references section for vendor advisories and patches from isc. Update bind to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| isc | bind | 9.14.0 | Affected |
| synology | dns_server | >= 0, < 2.2.2-5027 | Affected |
References
Frequently Asked Questions
What is CVE-2020-8621?
CVE-2020-8621 is a high-severity vulnerability affecting isc bind. It was published on August 21, 2020 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2020-8621?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2020-8621?
Check the references section for vendor advisories and patches from isc. Update bind to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2020-8621?
CyberStrike's AI-powered security agents can automatically detect CVE-2020-8621 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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