CVE-2023-26249: Knot Resolver before 5.6.0 enables attackers to consume its resources, launching amplification attacks and potentially causing a denial of service…

PriorityP336high7.5CVSS 3.1

AVNACLPRNUINSUCNINAH

EPSS

0.71%

48.9th percentile

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.

Affected

5 ranges

Vendor	Product	Version range	Fixed in
cz.nic	knot-resolver	>= 0 < 5.6.0-1	5.6.0-1
cz.nic	knot-resolver	>= 0 < 5.6.0-1	5.6.0-1
cz.nic	knot-resolver	>= 0 < 5.6.0-1	5.6.0-1
debian	knot-resolver	< knot-resolver 5.6.0-1 (bookworm)	knot-resolver 5.6.0-1 (bookworm)
nic	knot_resolver	< 5.6.0	5.6.0

CVSS provenance

nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

osv7.5HIGH

vendor_debian7.5HIGH

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