CVE catalog
CVE-2024-33655
Unbound vulnerability
- Severity
- Low · CVSS 3.7
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 1.74% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | unbound | sid | 1.26.2-1 | fixed |
| Debian | unbound | forky | 1.26.2-1 | fixed |
| Debian | unbound | trixie | 1.22.0-2+deb13u3 | fixed |
| Debian | unbound | trixie-security | 1.26.2-0+deb13u1 | fixed |
| Debian | unbound | bookworm | 1.17.1-2+deb12u4 | fixed |
| Debian | unbound | bookworm-security | 1.17.1-2+deb12u3 | fixed |
| Ubuntu | unbound | noble | 1.19.2-1ubuntu3.1 | fixed |
| Ubuntu | libunbound-dev | noble | 1.19.2-1ubuntu3.1 | fixed |
| Ubuntu | libunbound8 | noble | 1.19.2-1ubuntu3.1 | fixed |
| Ubuntu | python3-unbound | noble | 1.19.2-1ubuntu3.1 | fixed |
| Ubuntu | unbound-anchor | noble | 1.19.2-1ubuntu3.1 | fixed |
| Ubuntu | unbound-host | noble | 1.19.2-1ubuntu3.1 | fixed |
| Ubuntu | unbound | pro | 1.6.5-1 | vulnerable |
| Ubuntu | unbound | pro | 1.6.7-1 | vulnerable |
| Ubuntu | unbound | pro | 1.6.7-1build1 | vulnerable |
| Ubuntu | unbound | pro | 1.6.7-1ubuntu1 | vulnerable |
| Ubuntu | unbound | pro | 1.6.7-1ubuntu2 | vulnerable |
| Ubuntu | unbound | pro | 1.6.7-1ubuntu2.1 | vulnerable |
| Ubuntu | unbound | pro | 1.6.7-1ubuntu2.2 | vulnerable |
| Ubuntu | unbound | pro | 1.6.7-1ubuntu2.3 | vulnerable |
| Ubuntu | unbound | pro | 1.6.7-1ubuntu2.4 | vulnerable |
| Ubuntu | unbound | pro | 1.6.7-1ubuntu2.5 | vulnerable |
| Ubuntu | unbound | pro | 1.6.7-1ubuntu2.6 | vulnerable |
| Ubuntu | unbound | pro | 1.6.7-1ubuntu2.6+esm2 | vulnerable |
| Ubuntu | unbound | pro | 1.6.7-1ubuntu2.6+esm3 | vulnerable |
| Ubuntu | unbound | pro | 1.6.7-1ubuntu2.6+esm4 | vulnerable |
| Ubuntu | unbound | pro | 1.6.7-1ubuntu2.6+esm5 | vulnerable |
| Ubuntu | unbound | pro | 1.6.7-1ubuntu2.6+esm6 | vulnerable |
| Ubuntu | unbound | 20.04 | 1.9.0-2ubuntu1 | vulnerable |
| Ubuntu | unbound | 20.04 | 1.9.0-2ubuntu2 | vulnerable |
| Ubuntu | unbound | 20.04 | 1.9.4-2 | vulnerable |
| Ubuntu | unbound | 20.04 | 1.9.4-2ubuntu1 | vulnerable |
| Ubuntu | unbound | 20.04 | 1.9.4-2ubuntu1.1 | vulnerable |
| Ubuntu | unbound | 20.04 | 1.9.4-2ubuntu1.2 | vulnerable |
| Ubuntu | unbound | 20.04 | 1.9.4-2ubuntu1.3 | vulnerable |
| Ubuntu | unbound | 20.04 | 1.9.4-2ubuntu1.4 | vulnerable |
| Ubuntu | unbound | 20.04 | 1.9.4-2ubuntu1.5 | vulnerable |
| Ubuntu | unbound | 20.04 | 1.9.4-2ubuntu1.6 | fixed |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu1 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu3 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.1 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.2 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.3 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.4 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.5 | fixed |
| Ubuntu | unbound | 24.04 | 1.17.1-2 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.18.0-2ubuntu1 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.18.0-2ubuntu2 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.1-1ubuntu1 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.2-1ubuntu1 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.2-1ubuntu3 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.2-1ubuntu3.1 | fixed |
| Alpine | unbound | 3.17 | 1.20.0-r0 | fixed |
| Alpine | unbound | 3.18 | 1.20.0-r0 | fixed |
| Alpine | unbound | 3.19 | 1.20.0-r0 | fixed |
| Alpine | unbound | 3.20 | 1.20.0-r0 | fixed |
| Alpine | unbound | 3.21 | 1.20.0-r0 | fixed |
| Alpine | unbound | 3.22 | 1.20.0-r0 | fixed |
| Alpine | unbound | 3.23 | 1.20.0-r0 | fixed |
| Alpine | unbound | 3.24 | 1.20.0-r0 | fixed |
| Ubuntu | unbound | 20.04 | 1.9.0-2ubuntu1 | vulnerable |
| Ubuntu | unbound | 20.04 | 1.9.0-2ubuntu2 | vulnerable |
| Ubuntu | unbound | 20.04 | 1.9.4-2 | vulnerable |
| Ubuntu | unbound | 20.04 | 1.9.4-2ubuntu1 | vulnerable |
| Ubuntu | unbound | 20.04 | 1.9.4-2ubuntu1.1 | vulnerable |
| Ubuntu | unbound | 20.04 | 1.9.4-2ubuntu1.2 | vulnerable |
| Ubuntu | unbound | 20.04 | 1.9.4-2ubuntu1.3 | vulnerable |
| Ubuntu | unbound | 20.04 | 1.9.4-2ubuntu1.4 | vulnerable |
| Ubuntu | unbound | 20.04 | 1.9.4-2ubuntu1.5 | vulnerable |
| Ubuntu | unbound | 20.04 | 1.9.4-2ubuntu1.6 | fixed |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu1 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu3 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.1 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.2 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.3 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.4 | vulnerable |
| Ubuntu | unbound | 22.04 | 1.13.1-1ubuntu5.5 | fixed |
| Ubuntu | unbound | 24.04 | 1.17.1-2 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.18.0-2ubuntu1 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.18.0-2ubuntu2 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.1-1ubuntu1 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.2-1ubuntu1 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.2-1ubuntu3 | vulnerable |
| Ubuntu | unbound | 24.04 | 1.19.2-1ubuntu3.1 | fixed |
| Opensuse | unbound | tumbleweed | 1.20.0-1.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | unbound | source | sid | 1.20.0-1 | not yet assigned | Not reported | Not reported |
| Debian | unbound | source | forky | 1.20.0-1 | not yet assigned | Not reported | Not reported |
| Debian | unbound | source | trixie | 1.20.0-1 | not yet assigned | Not reported | Not reported |
| Debian | unbound | source | bookworm | 1.17.1-2+deb12u3 | not yet assigned | Not reported | Not reported |
| Ubuntu | unbound | deb | noble | 1.19.2-1ubuntu3.1 | Not reported | Not reported | Not reported |
| Ubuntu | libunbound-dev | deb | noble | 1.19.2-1ubuntu3.1 | Not reported | Not reported | Not reported |
| Ubuntu | libunbound8 | deb | noble | 1.19.2-1ubuntu3.1 | Not reported | Not reported | Not reported |
| Ubuntu | python3-unbound | deb | noble | 1.19.2-1ubuntu3.1 | Not reported | Not reported | Not reported |
| Ubuntu | unbound-anchor | deb | noble | 1.19.2-1ubuntu3.1 | Not reported | Not reported | Not reported |
| Ubuntu | unbound-host | deb | noble | 1.19.2-1ubuntu3.1 | Not reported | Not reported | Not reported |
| Ubuntu | unbound | deb | 20.04 | 1.9.4-2ubuntu1.6 | Not reported | UBUNTU-CVE-2024-33655 | Not reported |
| Ubuntu | unbound | deb | 22.04 | 1.13.1-1ubuntu5.5 | Not reported | UBUNTU-CVE-2024-33655 | Not reported |
| Ubuntu | unbound | deb | 24.04 | 1.19.2-1ubuntu3.1 | Not reported | UBUNTU-CVE-2024-33655 | Not reported |
| Alpine | unbound | apk | 3.17 | 1.20.0-r0 | Not reported | ALPINE-CVE-2024-33655 | Not reported |
| Alpine | unbound | apk | 3.18 | 1.20.0-r0 | Not reported | ALPINE-CVE-2024-33655 | Not reported |
| Alpine | unbound | apk | 3.19 | 1.20.0-r0 | Not reported | ALPINE-CVE-2024-33655 | Not reported |
| Alpine | unbound | apk | 3.20 | 1.20.0-r0 | Not reported | ALPINE-CVE-2024-33655 | Not reported |
| Alpine | unbound | apk | 3.21 | 1.20.0-r0 | Not reported | ALPINE-CVE-2024-33655 | Not reported |
| Alpine | unbound | apk | 3.22 | 1.20.0-r0 | Not reported | ALPINE-CVE-2024-33655 | Not reported |
| Alpine | unbound | apk | 3.23 | 1.20.0-r0 | Not reported | ALPINE-CVE-2024-33655 | Not reported |
| Alpine | unbound | apk | 3.24 | 1.20.0-r0 | Not reported | ALPINE-CVE-2024-33655 | Not reported |
| Ubuntu | unbound | deb | 20.04 | 1.9.4-2ubuntu1.6 | Not reported | USN-6791-1 | Not reported |
| Ubuntu | unbound | deb | 22.04 | 1.13.1-1ubuntu5.5 | Not reported | USN-6791-1 | Not reported |
| Ubuntu | unbound | deb | 24.04 | 1.19.2-1ubuntu3.1 | Not reported | USN-6791-1 | Not reported |
| Opensuse | unbound | rpm | tumbleweed | 1.20.0-1.1 | Not reported | OPENSUSE-SU-2024:13944-1 | Not reported |
OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
References
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2025_20024-1.json]
- [https://osv.dev/vulnerability/ALPINE-CVE-2024-33655]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2024-33655]
- [https://osv.dev/vulnerability/DLA-4280-1]
- [https://osv.dev/vulnerability/DSA-5987-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2024-33655]
- [https://osv.dev/vulnerability/USN-6791-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2024:13944-1]
- [https://security-tracker.debian.org/tracker/CVE-2024-33655]
- [https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-33655.json]
- [https://ubuntu.com/security/notices/USN-6791-1]
[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]