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CVE-2019-10190

HIGH
7.5
CVSS Score
Published: July 16, 2019 at 05:50 PM UTC
Updated: June 17, 2026 at 02:10 AM UTC
3 products affected across 3 vendorsFedoraKnot ResolverKnot Resolver

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Severity
HIGH7.5
Exploit prediction
EPSS 2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Fedora· Fedora Projectrpm
95%
2930
Knot Resolver· Nic
95%
v ≤ 3.2.04.0.0 ≤ v < 4.1.0
Affected range stops below 4.1.0, so it looks safe — our inference, not a vendor statement
Knot Resolver· Cz Nic
60%
3.2.0 ≤ v < 4.1.0
Affected range stops below 4.1.0, so it looks safe — our inference, not a vendor statement

References (5)

x_refsource_CONFIRMIssue TrackingThird Party Advisory
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10190
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2024/04/msg00017.html
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMSSWBHINIX4WE6UDXWM66L7JYEK6XS6/
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VZV5YZZ5766UIG2TFLFJL6EESQNAP5X5/
x_refsource_CONFIRMRelease NotesVendor Advisory
Source: [email protected]
https://www.knot-resolver.cz/2019-07-10-knot-resolver-4.1.0.html

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-20

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