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CVE-2023-26249

Date: February 20, 2023

Knot Resolver before 5.6.0 enables attackers to consume its resources, launching amplification attacks and potentially causing a denial of service. Specifically, a single client query may lead to a hundred TCP connection attempts if a DNS server closes connections without providing a response.

Language: C

Severity Score

Related Resources (5)

https://people.canonical.com/~ubuntu-security/cve/CVE-2023-26249
https://nvd.nist.gov/vuln/detail/CVE-2023-26249
https://security-tracker.debian.org/tracker/CVE-2023-26249
https://www.knot-resolver.cz/2023-01-26-knot-resolver-5.6.0.html
https://www.mend.io/vulnerability-database/CVE-2023-26249

Severity Score

Weakness Type (CWE)

Allocation of Resources Without Limits or Throttling

CWE-770

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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