CVE-2019-10190
HIGHknot_resolver < 3.2.0 - DNSSEC Validation Bypass via NXDOMAIN Answer
Title source: llmDescription
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.
References (5)
Core 5
Core References
Issue Tracking, Third Party Advisory x_refsource_confirm
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10190
Release Notes, Vendor Advisory x_refsource_confirm
https://www.knot-resolver.cz/2019-07-10-knot-resolver-4.1.0.html
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VZV5YZZ5766UIG2TFLFJL6EESQNAP5X5/
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMSSWBHINIX4WE6UDXWM66L7JYEK6XS6/
Scores
CVSS v3
7.5
EPSS
0.0199
EPSS Percentile
78.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Details
CWE
CWE-20
Status
published
Products (3)
fedoraproject/fedora
29
fedoraproject/fedora
30
nic/knot_resolver
< 3.2.0
Published
Jul 16, 2019
Tracked Since
Feb 18, 2026