FKIE_CVE-2016-4955
Vulnerability from fkie_nvd - Published: 2016-07-05 01:59 - Updated: 2026-06-17 00:48
Severity
Summary
ntpd in NTP 4.x before 4.2.8p8, when autokey is enabled, allows remote attackers to cause a denial of service (peer-variable clearing and association outage) by sending (1) a spoofed crypto-NAK packet or (2) a packet with an incorrect MAC value at a certain time.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| ntp | ntp | * | |
| ntp | ntp | * | |
| ntp | ntp | 4.2.8 | |
| ntp | ntp | 4.2.8 | |
| ntp | ntp | 4.2.8 | |
| ntp | ntp | 4.2.8 | |
| ntp | ntp | 4.2.8 | |
| ntp | ntp | 4.2.8 | |
| ntp | ntp | 4.2.8 | |
| ntp | ntp | 4.2.8 | |
| ntp | ntp | 4.2.8 | |
| ntp | ntp | 4.2.8 | |
| ntp | ntp | 4.2.8 | |
| ntp | ntp | 4.2.8 | |
| ntp | ntp | 4.2.8 | |
| ntp | ntp | 4.2.8 | |
| ntp | ntp | 4.2.8 | |
| ntp | ntp | 4.2.8 | |
| ntp | ntp | 4.2.8 | |
| ntp | ntp | 4.2.8 | |
| ntp | ntp | 4.2.8 | |
| ntp | ntp | 4.2.8 | |
| ntp | ntp | 4.2.8 | |
| oracle | solaris | 10 | |
| oracle | solaris | 11.3 | |
| suse | manager_proxy | 2.1 | |
| suse | openstack_cloud | 5 | |
| novell | suse_manager | 2.1 | |
| opensuse | leap | 42.1 | |
| opensuse | opensuse | 13.2 | |
| suse | linux_enterprise_desktop | 12 | |
| suse | linux_enterprise_server | 11 | |
| suse | linux_enterprise_server | 11 | |
| suse | linux_enterprise_server | 11 | |
| suse | linux_enterprise_server | 12 | |
| siemens | simatic_net_cp_443-1_opc_ua_firmware | * | |
| siemens | simatic_net_cp_443-1_opc_ua | - |
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"id": "CVE-2016-4955",
"lastModified": "2026-06-17T00:48:29.747",
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"url": "http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160603-ntpd"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory",
"US Government Resource"
],
"url": "http://www.kb.cert.org/vuls/id/321640"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.securityfocus.com/archive/1/538599/100/0/threaded"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.securityfocus.com/archive/1/538600/100/0/threaded"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.securityfocus.com/archive/1/archive/1/538599/100/0/threaded"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.securityfocus.com/archive/1/archive/1/538600/100/0/threaded"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securityfocus.com/bid/91007"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securitytracker.com/id/1036037"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.ubuntu.com/usn/USN-3096-1"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K3EYJQHJZ2KTVQ7ICEFHXTLZ36MRASWX/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ORAMN3Q7TVJ54MBYF75XCJOE3DP7LYHT/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WNWGCQLW2VY72NIUYMJOCAKJKTXHDUK2/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-16:24.ntp.asc"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://security.gentoo.org/glsa/201607-15"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://www.kb.cert.org/vuls/id/321640"
}
],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-362"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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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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