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Vulnerability · Published Jun 6, 2024 · Assigned by mitre

CVE-2024-33655

High 7.5

In plain English

A high-severity uncontrolled resource consumption in the python3-unbound package (AlmaLinux). Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.7% (higher than 78% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)1.7%top 22.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:10python3-unbound1.24.2-7.el10ALSA-2026:18556
AlmaLinux:9python3-unbound1.24.2-2.el9ALSA-2026:18931
AlmaLinux:10unbound1.24.2-7.el10ALSA-2026:18556
AlmaLinux:9unbound1.24.2-2.el9ALSA-2026:18931
AlmaLinux:10unbound-anchor1.24.2-7.el10ALSA-2026:18556
AlmaLinux:10unbound-devel1.24.2-7.el10ALSA-2026:18556
AlmaLinux:9unbound-devel1.24.2-2.el9ALSA-2026:18931
AlmaLinux:10unbound-dracut1.24.2-7.el10ALSA-2026:18556
AlmaLinux:9unbound-dracut1.24.2-2.el9ALSA-2026:18931
AlmaLinux:10unbound-libs1.24.2-7.el10ALSA-2026:18556
AlmaLinux:9unbound-libs1.24.2-2.el9ALSA-2026:18931
AlmaLinux:10unbound-utils1.24.2-7.el10ALSA-2026:18556
Alpine:v3.20unbound1.20.0-r0ALPINE-CVE-2024-33655
Alpine:v3.21unbound1.20.0-r0ALPINE-CVE-2024-33655
Alpine:v3.22unbound1.20.0-r0ALPINE-CVE-2024-33655
Alpine:v3.23unbound1.20.0-r0ALPINE-CVE-2024-33655
Alpine:v3.24unbound1.20.0-r0ALPINE-CVE-2024-33655
Debian:12unbound1.17.1-2+deb12u3DEBIAN-CVE-2024-33655
Debian:12unbound1.17.1-2+deb12u3DSA-5987-1
Debian:13unbound1.20.0-1DEBIAN-CVE-2024-33655
Debian:14unbound1.20.0-1DEBIAN-CVE-2024-33655
Rocky Linux:10unbound0:1.24.2-7.el10RLSA-2026:18556
Rocky Linux:9unbound0:1.24.2-2.el9RLSA-2026:18931
Ubuntu:22.04:LTSunbound1.13.1-1ubuntu5.5USN-6791-1
Ubuntu:22.04:LTSunbound1.13.1-1ubuntu5.5UBUNTU-CVE-2024-33655
Ubuntu:24.04:LTSunbound1.19.2-1ubuntu3.1USN-6791-1
Ubuntu:24.04:LTSunbound1.19.2-1ubuntu3.1UBUNTU-CVE-2024-33655

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References