Knot Resolver up to 4.0.x DNS Resolver DNSSEC input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Knot Resolver up to 4.0.x. Affected by this vulnerability is an unknown functionality of the component DNS Resolver. This manipulation causes input validation (DNSSEC). This vulnerability appears as CVE-2019-10190. The attack may be initiated remotely. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Knot Resolver up to 4.0.x. It has been declared as critical. Affected by this vulnerability is some unknown processing of the component DNS Resolver. The manipulation with an unknown input leads to a input validation vulnerability (DNSSEC). The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was presented 07/16/2019 as not defined bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. This vulnerability is known as CVE-2019-10190 since 03/27/2019. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 207977 (Ubuntu 20.04 LTS : Knot Resolver vulnerabilities (USN-7047-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.1.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (207977). See VDB-138194 for similar entry. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 5.4
CNA Vector (Red Hat, Inc.): 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Name: DNSSEC
Class: Input validation / DNSSEC
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 207977
Nessus Name: Ubuntu 20.04 LTS : Knot Resolver vulnerabilities (USN-7047-1)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Resolver 4.1.0

Timelineinfo

03/27/2019 🔍
07/16/2019 +111 days 🔍
07/17/2019 +1 days 🔍
10/02/2024 +1904 days 🔍

Sourcesinfo

Advisory: FEDORA-2019-20f95b0b39
Status: Not defined
Confirmation: 🔍

CVE: CVE-2019-10190 (🔍)
GCVE (CVE): GCVE-0-2019-10190
GCVE (VulDB): GCVE-100-138193
See also: 🔍

Entryinfo

Created: 07/17/2019 22:24
Updated: 10/02/2024 07:13
Changes: 07/17/2019 22:24 (60), 07/07/2020 16:11 (1), 11/01/2023 06:50 (4), 11/01/2023 07:03 (12), 10/02/2024 07:13 (16)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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