FKIE_CVE-2016-2517
Vulnerability from fkie_nvd - Published: 2017-01-30 21:59 - Updated: 2025-04-20 01:37
Severity ?
Summary
NTP before 4.2.8p7 and 4.3.x before 4.3.92 allows remote attackers to cause a denial of service (prevent subsequent authentication) by leveraging knowledge of the controlkey or requestkey and sending a crafted packet to ntpd, which changes the value of trustedkey, controlkey, or requestkey. NOTE: this vulnerability exists because of a CVE-2016-2516 regression.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| ntp | ntp | * | |
| ntp | ntp | 4.3.0 | |
| ntp | ntp | 4.3.1 | |
| ntp | ntp | 4.3.2 | |
| ntp | ntp | 4.3.3 | |
| ntp | ntp | 4.3.4 | |
| ntp | ntp | 4.3.5 | |
| ntp | ntp | 4.3.6 | |
| ntp | ntp | 4.3.7 | |
| ntp | ntp | 4.3.8 | |
| ntp | ntp | 4.3.9 | |
| ntp | ntp | 4.3.10 | |
| ntp | ntp | 4.3.11 | |
| ntp | ntp | 4.3.12 | |
| ntp | ntp | 4.3.13 | |
| ntp | ntp | 4.3.14 | |
| ntp | ntp | 4.3.15 | |
| ntp | ntp | 4.3.16 | |
| ntp | ntp | 4.3.17 | |
| ntp | ntp | 4.3.18 | |
| ntp | ntp | 4.3.19 | |
| ntp | ntp | 4.3.20 | |
| ntp | ntp | 4.3.21 | |
| ntp | ntp | 4.3.22 | |
| ntp | ntp | 4.3.23 | |
| ntp | ntp | 4.3.24 | |
| ntp | ntp | 4.3.25 | |
| ntp | ntp | 4.3.26 | |
| ntp | ntp | 4.3.27 | |
| ntp | ntp | 4.3.28 | |
| ntp | ntp | 4.3.29 | |
| ntp | ntp | 4.3.30 | |
| ntp | ntp | 4.3.31 | |
| ntp | ntp | 4.3.32 | |
| ntp | ntp | 4.3.33 | |
| ntp | ntp | 4.3.34 | |
| ntp | ntp | 4.3.35 | |
| ntp | ntp | 4.3.36 | |
| ntp | ntp | 4.3.37 | |
| ntp | ntp | 4.3.38 | |
| ntp | ntp | 4.3.39 | |
| ntp | ntp | 4.3.40 | |
| ntp | ntp | 4.3.41 | |
| ntp | ntp | 4.3.42 | |
| ntp | ntp | 4.3.43 | |
| ntp | ntp | 4.3.44 | |
| ntp | ntp | 4.3.45 | |
| ntp | ntp | 4.3.46 | |
| ntp | ntp | 4.3.47 | |
| ntp | ntp | 4.3.48 | |
| ntp | ntp | 4.3.49 | |
| ntp | ntp | 4.3.50 | |
| ntp | ntp | 4.3.51 | |
| ntp | ntp | 4.3.52 | |
| ntp | ntp | 4.3.53 | |
| ntp | ntp | 4.3.54 | |
| ntp | ntp | 4.3.55 | |
| ntp | ntp | 4.3.56 | |
| ntp | ntp | 4.3.57 | |
| ntp | ntp | 4.3.58 | |
| ntp | ntp | 4.3.59 | |
| ntp | ntp | 4.3.60 | |
| ntp | ntp | 4.3.61 | |
| ntp | ntp | 4.3.62 | |
| ntp | ntp | 4.3.63 | |
| ntp | ntp | 4.3.64 | |
| ntp | ntp | 4.3.65 | |
| ntp | ntp | 4.3.66 | |
| ntp | ntp | 4.3.67 | |
| ntp | ntp | 4.3.68 | |
| ntp | ntp | 4.3.69 | |
| ntp | ntp | 4.3.70 | |
| ntp | ntp | 4.3.71 | |
| ntp | ntp | 4.3.72 | |
| ntp | ntp | 4.3.73 | |
| ntp | ntp | 4.3.74 | |
| ntp | ntp | 4.3.75 | |
| ntp | ntp | 4.3.76 | |
| ntp | ntp | 4.3.77 | |
| ntp | ntp | 4.3.78 | |
| ntp | ntp | 4.3.79 | |
| ntp | ntp | 4.3.80 | |
| ntp | ntp | 4.3.81 | |
| ntp | ntp | 4.3.82 | |
| ntp | ntp | 4.3.83 | |
| ntp | ntp | 4.3.84 | |
| ntp | ntp | 4.3.85 | |
| ntp | ntp | 4.3.86 | |
| ntp | ntp | 4.3.87 | |
| ntp | ntp | 4.3.88 | |
| ntp | ntp | 4.3.89 | |
| ntp | ntp | 4.3.90 | |
| ntp | ntp | 4.3.91 |
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],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "NTP before 4.2.8p7 and 4.3.x before 4.3.92 allows remote attackers to cause a denial of service (prevent subsequent authentication) by leveraging knowledge of the controlkey or requestkey and sending a crafted packet to ntpd, which changes the value of trustedkey, controlkey, or requestkey. NOTE: this vulnerability exists because of a CVE-2016-2516 regression."
},
{
"lang": "es",
"value": "NTP en versiones anteriores a 4.2.8p7 y 4.3.x en versiones anteriores a 4.3.92 permite a los atacantes remotos provocar una denegaci\u00f3n de servicio (evitar la posterior autenticaci\u00f3n) aprovechando el conocimiento de la clave de control o requestkey y enviando un paquete creado a ntpd, que cambia el valor de trustedkey, Controlkey o requestkey. NOTA: esta vulnerabilidad existe debido a una regresi\u00f3n de la CVE-2016-2516."
}
],
"id": "CVE-2016-2517",
"lastModified": "2025-04-20T01:37:25.860",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "HIGH",
"accessVector": "NETWORK",
"authentication": "SINGLE",
"availabilityImpact": "COMPLETE",
"baseScore": 4.9,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:H/Au:S/C:N/I:N/A:C",
"version": "2.0"
},
"exploitabilityScore": 3.9,
"impactScore": 6.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"cvssMetricV30": [
{
"cvssData": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.0"
},
"exploitabilityScore": 1.6,
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"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2017-01-30T21:59:01.033",
"references": [
{
"source": "cve@mitre.org",
"tags": [
"Vendor Advisory"
],
"url": "http://support.ntp.org/bin/view/Main/NtpBug3010"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory"
],
"url": "http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securityfocus.com/bid/88189"
},
{
"source": "cve@mitre.org",
"url": "http://www.securitytracker.com/id/1035705"
},
{
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"url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc"
},
{
"source": "cve@mitre.org",
"url": "https://security.gentoo.org/glsa/201607-15"
},
{
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"url": "https://security.netapp.com/advisory/ntap-20171004-0002/"
},
{
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"tags": [
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],
"url": "https://www.kb.cert.org/vuls/id/718152"
},
{
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},
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"url": "https://www.kb.cert.org/vuls/id/718152"
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],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Deferred",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-20"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
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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