CVE-2020-8620

bind: A specially crafted large TCP payload can trigger an assertion failure in tcpdns.c

Published Aug 21, 2020 CVSS 3.1 · 7.5 High EPSS 3.9% KEV · Not listed
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.

Remediation

Vendor Solution

Upgrade to the patched release most closely related to your current version of BIND: BIND 9.16.6 BIND 9.17.4


Vendor Workaround

No workarounds known.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2020-29468 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.
Ubuntu USN Ubuntu USN USN-4468-1 Bind vulnerabilities
History

No history.

Weaknesses

Sources

Status
PUBLISHED
Assigner
isc
Published
Updated
Sep 17, 2024, 1:40 AM
Reserved
Feb 5, 2020, 12:00 AM
Status
Modified
Published
Aug 21, 2020, 9:15 PM
Modified
Jun 17, 2026, 3:26 AM
Severity
Moderate
Public date
Aug 20, 2020, 12:00 AM