CVE-2022-40188: High severity nic Knot Resolver vulnerability

Published Sep 23, 2022
·
Updated

Knot Resolver before 5.5.3 allows remote attackers to cause a denial of service (CPU consumption) because of algorithmic complexity. During an attack, an authoritative server must return large NS sets or address sets.

Affected Software

12 affected componentsFixes available
debian/knot-resolver<=3.2.1-3, <=5.3.1-1+deb11u1
3.2.1-3+deb10u15.6.0-15.7.0-1
ubuntu/knot-resolver<5.5.1-5ubuntu0.22.10.1
5.5.1-5ubuntu0.22.10.1
ubuntu/knot-resolver<5.5.3-1
5.5.3-1
ubuntu/knot-resolver<2.1.1-1ubuntu0.1~
2.1.1-1ubuntu0.1~
ubuntu/knot-resolver<3.2.1-3ubuntu2.1
3.2.1-3ubuntu2.1
ubuntu/knot-resolver<5.4.4-1ubuntu0.1~
5.4.4-1ubuntu0.1~
ubuntu/knot-resolver<1.0.0~
1.0.0~
nic Knot Resolver<5.5.3
Fedoraproject Fedora=35
Fedoraproject Fedora=36
Fedoraproject Fedora=37
Debian Debian Linux=10.0

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade debian/knot-resolver to a version that resolves this vulnerability.

    Fixed in 3.2.1-3+deb10u1Fixed in 5.6.0-1Fixed in 5.7.0-1
  2. Upgrade

    Upgrade ubuntu/knot-resolver to a version that resolves this vulnerability.

    Fixed in 5.5.1-5ubuntu0.22.10.1
  3. Upgrade

    Upgrade ubuntu/knot-resolver to a version that resolves this vulnerability.

    Fixed in 5.5.3-1
  4. Upgrade

    Upgrade ubuntu/knot-resolver to a version that resolves this vulnerability.

    Fixed in 2.1.1-1ubuntu0.1~
  5. Upgrade

    Upgrade ubuntu/knot-resolver to a version that resolves this vulnerability.

    Fixed in 3.2.1-3ubuntu2.1
  6. Upgrade

    Upgrade ubuntu/knot-resolver to a version that resolves this vulnerability.

    Fixed in 5.4.4-1ubuntu0.1~
  7. Upgrade

    Upgrade ubuntu/knot-resolver to a version that resolves this vulnerability.

    Fixed in 1.0.0~
  8. Upgrade

    Upgrade Knot Resolver to a version that resolves this vulnerability.

    Fixed in 5.5.3

Event History

Sep 23, 2022
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
Description
Data Sourced
via NVD·04:15 PM
DescriptionSeverityWeaknessAffected Software
Jan 12, 2024
Data Sourced
via Launchpad·12:11 AM
Description

Parent advisories

This vulnerability appears in the following advisories.

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Frequently Asked Questions

1

What is CVE-2022-40188?

CVE-2022-40188 is a vulnerability in Knot Resolver before version 5.5.3 that allows remote attackers to cause a denial of service (CPU consumption) due to algorithmic complexity.

2

How severe is CVE-2022-40188?

CVE-2022-40188 has a severity rating of 7.5 (high).

3

Which software versions are affected by CVE-2022-40188?

Knot Resolver versions up to and including 5.5.1-5ubuntu0.22.10.1, 5.5.3-1, 2.1.1-1ubuntu0.1~, 3.2.1-3ubuntu2.1, 5.4.4-1ubuntu0.1~, and 1.0.0~ are affected.

4

How do I fix CVE-2022-40188?

To fix CVE-2022-40188, update Knot Resolver to version 5.5.3 or higher.

5

What is the Common Weakness Enumeration (CWE) ID for CVE-2022-40188?

The Common Weakness Enumeration (CWE) ID for CVE-2022-40188 is CWE-407.

Company

Resources

Contact

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