CVE-2023-26249
HIGHKnot Resolver < 5.6.0 - Denial of Service via TCP Connection Amplification
Title source: llmDescription
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.
References (1)
Core 1
Core References
Release Notes, Vendor Advisory
https://www.knot-resolver.cz/2023-01-26-knot-resolver-5.6.0.html
Scores
CVSS v3
7.5
EPSS
0.0071
EPSS Percentile
48.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-770
Status
published
Products (1)
nic/knot_resolver
< 5.6.0
Published
Feb 21, 2023
Tracked Since
Feb 18, 2026