CVE-2019-10190

Description

A vulnerability was discovered in DNS resolver component of knot resolver through version 3.2.0 before 4.1.0 which allows remote attackers to bypass DNSSEC validation for non-existence answer. NXDOMAIN answer would get passed through to the client even if its DNSSEC validation failed, instead of sending a SERVFAIL packet. Caching is not affected by this particular bug but see CVE-2019-10191.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.43%
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-2019-10190 issue tracking third party advisory
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-2019-10190?
CVE-2019-10190 has been scored as a high severity vulnerability.
How to fix CVE-2019-10190?
To fix CVE-2019-10190, 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-2019-10190 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2019-10190 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-2019-10190?
CVE-2019-10190 affects CZ.NIC knot-resolver.
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