high
7.5
CWE
407
Advisory Published
Updated

CVE-2022-40188

First published: Fri 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.

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Nic Knot Resolver<5.5.3
Fedoraproject Fedora=35
Fedoraproject Fedora=36
Fedoraproject Fedora=37
Debian Debian Linux=10.0
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~
debian/knot-resolver<=3.2.1-3<=5.3.1-1+deb11u1
3.2.1-3+deb10u1
5.6.0-1
5.7.0-1
<5.5.3
=35
=36
=37
=10.0

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • 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.

  • How severe is CVE-2022-40188?

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

  • 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.

  • How do I fix CVE-2022-40188?

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

  • 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.

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