PT-2019-11613 · Cz.Nic+2 · Knot Resolver+2

Petr Špaček · Published 2019-07-10 · Updated 2024-10-01 · CVE-2019-10190

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Name of the Vulnerable Software and Affected Versions: knot resolver versions prior to 4.1.0

Description: A vulnerability was discovered in the DNS resolver component that allows remote attackers to bypass DNSSEC validation for non-existence answers. Specifically, NXDOMAIN answers would get passed through to the client even if their DNSSEC validation failed, instead of sending a SERVFAIL packet. Caching is not affected by this bug.

Recommendations: For versions prior to 4.1.0, update to version 4.1.0 or later to resolve the issue. As a temporary workaround, consider restricting the DNS resolver component to minimize the risk of exploitation.

Fix

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CVE-2019-10190

DLA-3795-1

USN-7047-1

Affected Products

Linuxmint

Ubuntu

Knot Resolver

References · 28

• https://osv.dev/vulnerability/UBUNTU-CVE-2019-10190 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VZV5YZZ5766UIG2TFLFJL6EESQNAP5X5 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2019-10190 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-12667 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-10190 · Security Note
• https://osv.dev/vulnerability/USN-7047-1 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMSSWBHINIX4WE6UDXWM66L7JYEK6XS6 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19331 · Security Note
• https://osv.dev/vulnerability/DLA-3795-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-10191 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2019-10190 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12667 · Security Note
• https://osv.dev/vulnerability/CVE-2019-10190 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-19331 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2019-10190 · Vendor Advisory