CVE-2019-6467
An error in the nxdomain redirect feature can cause BIND to exit with an INSIST assertion failure in query.c
- Published
- Oct 9, 2019
- Updated
- Sep 17, 2024
- Assigning CNA
- isc
- Evidence observed
- Aug 8, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HLow · next 30 days
- Percentile
- 92.4%
- 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
A programming error in the nxdomain-redirect feature can cause an assertion failure in query.c if the alternate namespace used by nxdomain-redirect is a descendant of a zone that is served locally. The most likely scenario where this might occur is if the server, in addition to performing NXDOMAIN redirection for recursive clients, is also serving a local copy of the root zone or using mirroring to provide the root zone, although other configurations are also possible. Versions affected: BIND 9.12.0-> 9.12.4, 9.14.0. Also affects all releases in the 9.13 development branch.
Sources
1Dockerized proof-of-concept exploit for CVE-2019-6467, a BIND nxdomain-redirect vulnerability, enabling DNS cache poisoning via non-existent domain queries.
Responsible use
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