CVE-2009-3563 (GCVE-0-2009-3563)
Vulnerability from cvelistv5 – Published: 2009-12-09 00:00 – Updated: 2024-08-07 06:31
VLAI
EPSS
VEX
Summary
ntp_request.c in ntpd in NTP before 4.2.4p8, and 4.2.5, allows remote attackers to cause a denial of service (CPU and bandwidth consumption) by using MODE_PRIVATE to send a spoofed (1) request or (2) response packet that triggers a continuous exchange of MODE_PRIVATE error responses between two NTP daemons.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
43 references
Date Public
2009-12-08 00:00
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"value": "ntp_request.c in ntpd in NTP before 4.2.4p8, and 4.2.5, allows remote attackers to cause a denial of service (CPU and bandwidth consumption) by using MODE_PRIVATE to send a spoofed (1) request or (2) response packet that triggers a continuous exchange of MODE_PRIVATE error responses between two NTP daemons."
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"value": "ntp_request.c en ntpd en NTP anterior v4.2.4p8, y v4.2.5, permite a atacantes remotos causar una denegaci\u00f3n de servicio (consumo de CPU y ancho de banda) por uso de MODE_PRIVATE para enviar una suplantaci\u00f3n de (1) petici\u00f3n o (2) paquete respueta lo que lanza continuo intercambio de errores de respuesta MODE_PRIVATE entre dos demonios NTP."
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"matchCriteriaId": "01D11498-3FC4-4890-9B10-BBA74A01C9E7",
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},
{
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"matchCriteriaId": "35C2B888-66D6-45D3-97E3-C711B1C6971A",
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}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "ntp_request.c in ntpd in NTP before 4.2.4p8, and 4.2.5, allows remote attackers to cause a denial of service (CPU and bandwidth consumption) by using MODE_PRIVATE to send a spoofed (1) request or (2) response packet that triggers a continuous exchange of MODE_PRIVATE error responses between two NTP daemons."
},
{
"lang": "es",
"value": "ntp_request.c en ntpd en NTP anterior v4.2.4p8, y v4.2.5, permite a atacantes remotos causar una denegaci\u00f3n de servicio (consumo de CPU y ancho de banda) por uso de MODE_PRIVATE para enviar una suplantaci\u00f3n de (1) petici\u00f3n o (2) paquete respueta lo que lanza continuo intercambio de errores de respuesta MODE_PRIVATE entre dos demonios NTP."
}
],
"id": "CVE-2009-3563",
"lastModified": "2026-04-23T00:35:47.467",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 6.4,
"confidentialityImpact": "NONE",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:P",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 4.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
]
},
"published": "2009-12-09T18:30:00.390",
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"url": "ftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2010-005.txt.asc"
},
{
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},
{
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"url": "http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=560074"
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{
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{
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"current_release_date": "2025-11-21T13:09:27+00:00",
"cve": "CVE-2009-3563",
"id": "CVE-2009-3563",
"initial_release_date": "2009-12-08T00:00:00+00:00",
"product_status:fixed": "126",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "ntpd: DoS with mode 7 packets (VU#568372)",
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"version": "3"
},
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"aggregate_severity": "moderate",
"current_release_date": "2025-04-25T14:16:43Z",
"cve": "CVE-2009-3563",
"id": "CVE-2009-3563",
"initial_release_date": "2023-02-15T06:02:19Z",
"product_status:recommended": "4",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2009-3563",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2009-3563.json",
"version": "7"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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