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{"cveTags": [], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "El protocolo DNS en RFC 1035 y sus actualizaciones permite a atacantes remotos provocar una denegaci\u00f3n de servicio (consumo de recursos) organizando que las consultas DNS se acumulen durante segundos, de modo que las respuestas se env\u00eden posteriormente en una r\u00e1faga pulsante (que puede considerarse amplificaci\u00f3n del tr\u00e1fico en algunos casos), tambi\u00e9n conocido como el problema \"DNSBomb\"."}], "id": "CVE-2024-33655", "lastModified": "2024-08-22T19:35:27.177", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2024-06-06T17:15:51.040", "references": [{"source": "cve@mitre.org", "url": "https://alas.aws.amazon.com/ALAS-2024-1934.html"}, {"source": "cve@mitre.org", "url": "https://datatracker.ietf.org/doc/html/rfc1035"}, {"source": "cve@mitre.org", "url": "https://github.com/NLnetLabs/unbound/commit/c3206f4568f60c486be6d165b1f2b5b254fea3de"}, {"source": "cve@mitre.org", "url": "https://github.com/TechnitiumSoftware/DnsServer/blob/master/CHANGELOG.md#version-120"}, {"source": "cve@mitre.org", "url": "https://gitlab.isc.org/isc-projects/bind9/-/issues/4398"}, {"source": "cve@mitre.org", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3TBXPRJ2Q235YUZKYDRWOSYNDFBJQWJ3/"}, {"source": "cve@mitre.org", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QITY2QBX2OCBTZIXD2A5ES62STFIA4AL/"}, {"source": "cve@mitre.org", "url": "https://meterpreter.org/researchers-uncover-dnsbomb-a-new-pdos-attack-exploiting-legitimate-dns-features/"}, {"source": "cve@mitre.org", "url": "https://nlnetlabs.nl/downloads/unbound/CVE-2024-33655.txt"}, {"source": "cve@mitre.org", "url": "https://nlnetlabs.nl/projects/unbound/security-advisories/"}, {"source": "cve@mitre.org", "url": "https://sp2024.ieee-security.org/accepted-papers.html"}, {"source": "cve@mitre.org", "url": "https://www.isc.org/blogs/2024-dnsbomb/"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-400"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "unbound: DNSBomb vulnerability", "id": "2279942", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2279942"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.7", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-400", "details": ["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.", "A DNSBomb flaw was found in the unbound package. The DNSBomb attack works by sending low-rate spoofed queries for a malicious zone to Unbound. By controlling the delay of the malicious authoritative answers, Unbound slowly accumulates pending answers for the spoofed addresses. When the authoritative answers become available to Unbound at the same time, Unbound starts serving all the accumulated queries. This results in large-sized, concentrated response bursts to the spoofed addresses."], "name": "CVE-2024-33655", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "unbound", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "unbound", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "unbound", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "unbound", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-09T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-33655\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-33655\nhttps://www.nlnetlabs.nl/news/2024/May/08/unbound-1.20.0-released/"], "threat_severity": "Low", "upstream_fix": "Unbound 1.20.0"}