CVE-2020-8620 - CVE House
Back to Database
Status published High CVE-2020-8620

In BIND 9.15.6 -> 9.16.5, 9.17.0 -> 9.17.3, An attacker...

Vulnerability Description

In BIND 9.15.6 -> 9.16.5, 9.17.0 -> 9.17.3, An attacker who can establish a TCP connection with the server and send data on that connection can exploit this to trigger the assertion failure, causing the server to exit.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2020-8620

Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • ISC would like to thank Emanuel Almeida of Cisco Systems, Inc. for bringing this vulnerability to our attention.

References

More from ISC

View All →
CVE-2025-8696
DoS attack against the Stork UI from an unauthenticated user
High 7.5
CVE-2025-8677
Resource exhaustion via malformed DNSKEY handling
High 7.5
CVE-2025-40780
Cache poisoning due to weak PRNG
High 8.6
CVE-2025-40779
Kea crash upon interaction between specific client options and subnet selection
High 7.5
CVE-2025-40778
Cache poisoning attacks with unsolicited RRs
High 8.6

Affected Vendor

Affected Software

BIND9
Vulnerable Versions:
9.15.6

Timeline

Official Publish: August 21st, 2020
Last Modified: September 17th, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.