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CVE-2017-3143

HighPublished

An error in TSIG authentication can permit unauthorized dynamic updates

Published: Jan 16, 2019
Updated: Sep 16, 2024
Assigning CNA: isc
Evidence observed: Aug 4, 2026

Primary CVSS

7.5/ 10High

nvd · CVSS 3.0

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS probability estimate

16.5%

Moderate · next 30 days

Percentile: 96.9%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

An attacker who is able to send and receive messages to an authoritative DNS server and who has knowledge of a valid TSIG key name for the zone and service being targeted may be able to manipulate BIND into accepting an unauthorized dynamic update. Affects BIND 9.4.0->9.8.8, 9.9.0->9.9.10-P1, 9.10.0->9.10.5-P1, 9.11.0->9.11.1-P1, 9.9.3-S1->9.9.10-S2, 9.10.5-S1->9.10.5-S2.

Sources

CVE-2017-3143Exploit
Exploit for TSIG bypass vulnerabilities in Bind (CVE-2017-3143) and Knot DNS (CVE-2017-11104)

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