CVE-2024-33655

high

Description

The DNS protocol in RFC 1035 and updates allows remote attackers to cause a denial of service (resource consumption) by arranging for DNS queries to be accumulated for seconds, such that responses are later sent in a pulsing burst (which can be considered traffic amplification in some cases), aka the "DNSBomb" issue.

References

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QITY2QBX2OCBTZIXD2A5ES62STFIA4AL/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3TBXPRJ2Q235YUZKYDRWOSYNDFBJQWJ3/

https://dnsbomb.net/

https://www.isc.org/blogs/2024-dnsbomb/

https://sp2024.ieee-security.org/accepted-papers.html

https://nlnetlabs.nl/projects/unbound/security-advisories/

https://nlnetlabs.nl/downloads/unbound/CVE-2024-33655.txt

https://meterpreter.org/researchers-uncover-dnsbomb-a-new-pdos-attack-exploiting-legitimate-dns-features/

https://lists.fedoraproject.org/archives/list/[email protected]/message/QITY2QBX2OCBTZIXD2A5ES62STFIA4AL/

https://lists.fedoraproject.org/archives/list/[email protected]/message/3TBXPRJ2Q235YUZKYDRWOSYNDFBJQWJ3/

https://lists.debian.org/debian-lts-announce/2025/08/msg00019.html

https://gitlab.isc.org/isc-projects/bind9/-/issues/4398

https://github.com/TechnitiumSoftware/DnsServer/blob/master/CHANGELOG.md#version-120

https://github.com/NLnetLabs/unbound/commit/c3206f4568f60c486be6d165b1f2b5b254fea3de

https://datatracker.ietf.org/doc/html/rfc1035

https://alas.aws.amazon.com/ALAS-2024-1934.html

Details

Source: Mitre, NVD

Published: 2024-06-06

Updated: 2025-11-04

Named Vulnerability: DNSBomb

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity: High

EPSS

EPSS: 0.02717