Vulnerability Details : CVE-2024-33655
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.
Vulnerability category: Denial of service
Products affected by CVE-2024-33655
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Exploit prediction scoring system (EPSS) score for CVE-2024-33655
1.43%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 80 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2024-33655
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
134c704f-9b21-4f2e-91b3-4a467353bcc0 | 2024-08-22 |
CWE ids for CVE-2024-33655
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The product does not properly control the allocation and maintenance of a limited resource.Assigned by: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)
References for CVE-2024-33655
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https://nlnetlabs.nl/projects/unbound/security-advisories/
NLnet Labs - Unbound - Security Advisories
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https://github.com/TechnitiumSoftware/DnsServer/blob/master/CHANGELOG.md#version-120
DnsServer/CHANGELOG.md at master · TechnitiumSoftware/DnsServer · GitHub
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https://github.com/NLnetLabs/unbound/commit/c3206f4568f60c486be6d165b1f2b5b254fea3de
- Fix for the DNSBomb vulnerability CVE-2024-33655. Thanks to Xiang Li · NLnetLabs/unbound@c3206f4 · GitHub
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https://datatracker.ietf.org/doc/html/rfc1035
RFC 1035 - Domain names - implementation and specification
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https://meterpreter.org/researchers-uncover-dnsbomb-a-new-pdos-attack-exploiting-legitimate-dns-features/
Researchers Uncover 'DNSBomb' – A New PDoS Attack Exploiting Legitimate DNS Features
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https://sp2024.ieee-security.org/accepted-papers.html
IEEE Symposium on Security and Privacy 2024
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https://nlnetlabs.nl/downloads/unbound/CVE-2024-33655.txt
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https://alas.aws.amazon.com/ALAS-2024-1934.html
ALAS-2024-1934
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https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QITY2QBX2OCBTZIXD2A5ES62STFIA4AL/
[SECURITY] Fedora 39 Update: unbound-1.20.0-1.fc39 - package-announce - Fedora Mailing-Lists
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https://www.isc.org/blogs/2024-dnsbomb/
Rate Limits in BIND 9 Effective vs. DNSBomb Vulnerability - ISC
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https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3TBXPRJ2Q235YUZKYDRWOSYNDFBJQWJ3/
[SECURITY] Fedora 40 Update: unbound-1.20.0-1.fc40 - package-announce - Fedora Mailing-Lists
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https://gitlab.isc.org/isc-projects/bind9/-/issues/4398
Report: New DNS-based Pulsing DoS Attack (DNSBomb) of BIND (#4398) · Issues · ISC Open Source Projects / BIND · GitLab
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