CVE-2024-33655: unbound Uncontrolled Resource Consumption
CVSS: 7.5v3.1HighDeferred
AliasesALPINE-CVE-2024-33655MGASA-2024-0203UBUNTU-CVE-2024-33655USN-6791-1DEBIAN-CVE-2024-33655openSUSE-SU-2024:13944-1
Published 06-06-2024Last modified 04-11-2025
Vulnerability summary
CVE-2024-33655 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in unbound. EPSS estimates a 1.74% chance of exploitation in the next 30 days, higher than 77.4% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (CVE.org)EPSS score
1.74%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 5 · Related 1Timeline
- 06-06-2024PublishedVulnerability first disclosed.
- 04-11-2025Last modifiedVulnerability information updated.
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.
CVSS metrics
5 scores · 5 sources · 1 versionHigh 7.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 5 agree
- OSV · AlpineEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
1.74%
Chance of exploitation in the next 30 days
Percentile
77%
Versus all other CVEs
30-day change
0.00 pp
From 1.74% on 19-09-2026
19-09-202619-10-2026
EPSS score1.74%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Alpine1 product
- unbound< 1.20.0-r0
Debian1 product
- unbound< 1.17.1-2+deb12u3 | < 1.20.0-1
Mageia1 product
- unbound< 1.20.0-1.mga9
Opensuse1 product
- unbound&distro=openSUSE Tumbleweed< 1.20.0-1.1
Ubuntu1 product
- unboundAll versions (No fix recorded) | < 1.9.4-2ubuntu1.6 | < 1.13.1-1ubuntu5.5 | < 1.19.2-1ubuntu3.1
5 vendors · 5 products
References
24 linksShow all 24 references
- lists.fedoraproject.org/archives/…Vendor Advisory
- lists.fedoraproject.org/archives/…Vendor Advisory
