CVE-2019-10191

Description

A vulnerability was discovered in DNS resolver of knot resolver before version 4.1.0 which allows remote attackers to downgrade DNSSEC-secure domains to DNSSEC-insecure state, opening possibility of domain hijack using attacks against insecure DNS protocol.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.50%
Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory knot-resolver.cz
Affected: CZ.NIC knot-resolver
Published at:
Updated at:

References

Link Tags
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10191 third party advisory issue tracking
https://www.knot-resolver.cz/2019-07-10-knot-resolver-4.1.0.html release notes vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VZV5YZZ5766UIG2TFLFJL6EESQNAP5X5/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMSSWBHINIX4WE6UDXWM66L7JYEK6XS6/ vendor advisory
https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html

Frequently Asked Questions

What is the severity of CVE-2019-10191?
CVE-2019-10191 has been scored as a high severity vulnerability.
How to fix CVE-2019-10191?
To fix CVE-2019-10191, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-10191 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2019-10191 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2019-10191?
CVE-2019-10191 affects CZ.NIC knot-resolver.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.