CVE-2024-33655

EUVD-2024-31371
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 75%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
technitiumdns_server
𝑥
≤ 1.19.3
ADP
Debian logo
Debian Releases
Debian Product
Codename
unbound
bookworm
1.17.1-2+deb12u3
fixed
bookworm (security)
1.17.1-2+deb12u3
fixed
bullseye
vulnerable
bullseye (security)
1.13.1-1+deb11u7
fixed
buster
ignored
forky
1.24.2-1
fixed
sid
1.24.2-1
fixed
trixie
1.22.0-2
fixed
trixie (security)
1.22.0-2+deb13u1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
unbound
bionic
needs-triage
focal
Fixed 1.9.4-2ubuntu1.6
released
jammy
Fixed 1.13.1-1ubuntu5.5
released
mantic
Fixed 1.17.1-2ubuntu0.2
released
noble
Fixed 1.19.2-1ubuntu3.1
released
oracular
Fixed 1.20.0-1ubuntu1
released
plucky
Fixed 1.20.0-1ubuntu1
released
questing
Fixed 1.20.0-1ubuntu1
released
trusty
needs-triage
xenial
needs-triage
Red Hat logo
Red Hat Enterprise Linux Releases
Red Hat Product
Release
python3-unbound
RHEL 9
0:1.24.2-2.el9
fixed
unbound
RHEL 9
0:1.24.2-2.el9
fixed
unbound-devel
RHEL 9
0:1.24.2-2.el9
fixed
unbound-dracut
RHEL 9
0:1.24.2-2.el9
fixed
unbound-libs
RHEL 9
0:1.24.2-2.el9
fixed
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
python2-unbound
Amazon Linux 2
0:1.7.3-15.amzn2.0.8
fixed
python3-unbound
Amazon Linux 2
0:1.7.3-15.amzn2.0.8
fixed
Amazon Linux 2023
0:1.17.1-1.amzn2023.0.4
fixed
python3-unbound-debuginfo
Amazon Linux 2023
0:1.17.1-1.amzn2023.0.4
fixed
unbound
Amazon Linux 1
0:1.6.6-1.6.amzn1
fixed
Amazon Linux 2
0:1.7.3-15.amzn2.0.8
fixed
Amazon Linux 2023
0:1.17.1-1.amzn2023.0.4
fixed
unbound-anchor
Amazon Linux 2023
0:1.17.1-1.amzn2023.0.4
fixed
unbound-anchor-debuginfo
Amazon Linux 2023
0:1.17.1-1.amzn2023.0.4
fixed
unbound-debuginfo
Amazon Linux 1
0:1.6.6-1.6.amzn1
fixed
Amazon Linux 2
0:1.7.3-15.amzn2.0.8
fixed
Amazon Linux 2023
0:1.17.1-1.amzn2023.0.4
fixed
unbound-debugsource
Amazon Linux 2023
0:1.17.1-1.amzn2023.0.4
fixed
unbound-devel
Amazon Linux 1
0:1.6.6-1.6.amzn1
fixed
Amazon Linux 2
0:1.7.3-15.amzn2.0.8
fixed
Amazon Linux 2023
0:1.17.1-1.amzn2023.0.4
fixed
unbound-libs
Amazon Linux 1
0:1.6.6-1.6.amzn1
fixed
Amazon Linux 2
0:1.7.3-15.amzn2.0.8
fixed
Amazon Linux 2023
0:1.17.1-1.amzn2023.0.4
fixed
unbound-libs-debuginfo
Amazon Linux 2023
0:1.17.1-1.amzn2023.0.4
fixed
unbound-python
Amazon Linux 1
0:1.6.6-1.6.amzn1
fixed
unbound-utils
Amazon Linux 2023
0:1.17.1-1.amzn2023.0.4
fixed
unbound-utils-debuginfo
Amazon Linux 2023
0:1.17.1-1.amzn2023.0.4
fixed
Azure Linux logo
Azure Linux Releases
Azure Package
Release
unbound
Azure Linux 3.0
0:1.19.1-3.azl3
fixed
CBL-Mariner 2.0
0:1.19.1-3.cm2
fixed
Common Weakness Enumeration
References
https://alas.aws.amazon.com/ALAS-2024-1934.html
https://datatracker.ietf.org/doc/html/rfc1035
https://github.com/NLnetLabs/unbound/commit/c3206f4568f60c486be6d165b1f2b5b254fea3de
https://github.com/TechnitiumSoftware/DnsServer/blob/master/CHANGELOG.md#version-120
https://gitlab.isc.org/isc-projects/bind9/-/issues/4398
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3TBXPRJ2Q235YUZKYDRWOSYNDFBJQWJ3/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QITY2QBX2OCBTZIXD2A5ES62STFIA4AL/
https://meterpreter.org/researchers-uncover-dnsbomb-a-new-pdos-attack-exploiting-legitimate-dns-features/
https://nlnetlabs.nl/downloads/unbound/CVE-2024-33655.txt
https://nlnetlabs.nl/projects/unbound/security-advisories/
https://sp2024.ieee-security.org/accepted-papers.html
https://www.isc.org/blogs/2024-dnsbomb/
https://alas.aws.amazon.com/ALAS-2024-1934.html
https://datatracker.ietf.org/doc/html/rfc1035
https://github.com/NLnetLabs/unbound/commit/c3206f4568f60c486be6d165b1f2b5b254fea3de
https://github.com/TechnitiumSoftware/DnsServer/blob/master/CHANGELOG.md#version-120
https://gitlab.isc.org/isc-projects/bind9/-/issues/4398
https://lists.debian.org/debian-lts-announce/2025/08/msg00019.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3TBXPRJ2Q235YUZKYDRWOSYNDFBJQWJ3/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QITY2QBX2OCBTZIXD2A5ES62STFIA4AL/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3TBXPRJ2Q235YUZKYDRWOSYNDFBJQWJ3/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QITY2QBX2OCBTZIXD2A5ES62STFIA4AL/
https://meterpreter.org/researchers-uncover-dnsbomb-a-new-pdos-attack-exploiting-legitimate-dns-features/
https://nlnetlabs.nl/downloads/unbound/CVE-2024-33655.txt
https://nlnetlabs.nl/projects/unbound/security-advisories/
https://sp2024.ieee-security.org/accepted-papers.html
https://www.isc.org/blogs/2024-dnsbomb/