CVE-2019-10191

High

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.

SeverityHigh

CVSS7.5

Exploit probability—

Product

Nic Knot Resolver

PublishedJul 16, 2019

First seenJul 16, 2019

Weakness typeCWE-20Improper input validation

How to fix

Update

nic knot_resolver4.1.0 or later

Vendor advisories

lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VZV5YZZ5766UIG2TFLFJL6EESQNAP5X5/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMSSWBHINIX4WE6UDXWM66L7JYEK6XS6/

Affected products

Product	Affected versions	Fixed in
nic knot_resolver	v < 4.1.0	4.1.0
fedoraproject fedora	29, 30	—

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