CVE-2016-1550 (GCVE-0-2016-1550)
Vulnerability from cvelistv5 – Published: 2017-01-06 21:00 – Updated: 2024-08-05 23:02
VLAI
EPSS
VEX
Summary
An exploitable vulnerability exists in the message authentication functionality of libntp in ntp 4.2.8p4 and NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92. An attacker can send a series of crafted messages to attempt to recover the message digest key.
Severity
5.3 (Medium)
CWE
- unspecified
Assigner
References
34 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| NTP Project | NTP |
Affected:
4.2.8p3
Affected: 4.2.8p4 |
guessed | |
| NTPsec Project | NTPSec |
Affected:
a5fb34b9cc89b92a8fef2f459004865c93bb7f92
|
guessed |
Date Public
2016-04-26 00:00
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},
"cveMetadata": {
"assignerOrgId": "37e5125f-f79b-445b-8fad-9564f167944b",
"assignerShortName": "certcc",
"cveId": "CVE-2016-1550",
"datePublished": "2017-01-06T21:00:00.000Z",
"dateReserved": "2016-01-07T00:00:00.000Z",
"dateUpdated": "2024-08-05T23:02:11.957Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2016-1550",
"date": "2026-09-14",
"epss": "0.03634",
"percentile": "0.88895"
},
"fkie_nvd": {
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"descriptions": "[{\"lang\": \"en\", \"value\": \"An exploitable vulnerability exists in the message authentication functionality of libntp in ntp 4.2.8p4 and NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92. An attacker can send a series of crafted messages to attempt to recover the message digest key.\"}, {\"lang\": \"es\", \"value\": \"Existe una vulnerabilidad explotable en el mensaje de autenticaci\\u00f3n de la funci\\u00f3n del libntp en ntp 4.2.8p4 y NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92. Un atacante puede enviar series de mensajes manipulados para intentar el mensaje de direcci\\u00f3n de clave.\"}]",
"id": "CVE-2016-1550",
"lastModified": "2024-11-21T02:46:37.563",
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"published": "2017-01-06T21:59:00.413",
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"sourceIdentifier": "cret@cert.org",
"vulnStatus": "Modified",
"weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-200\"}]}]"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2016-1550\",\"sourceIdentifier\":\"cret@cert.org\",\"published\":\"2017-01-06T21:59:00.413\",\"lastModified\":\"2026-05-06T22:30:45.220\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"An exploitable vulnerability exists in the message authentication functionality of libntp in ntp 4.2.8p4 and NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92. An attacker can send a series of crafted messages to attempt to recover the message digest key.\"},{\"lang\":\"es\",\"value\":\"Existe una vulnerabilidad explotable en el mensaje de autenticaci\u00f3n de la funci\u00f3n del libntp en ntp 4.2.8p4 y NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92. 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clave.\"}],\"metrics\":{\"cvssMetricV30\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.0\",\"vectorString\":\"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N\",\"baseScore\":5.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":1.4}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:N/C:P/I:N/A:N\",\"baseScore\":5.0,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":10.0,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-200\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:ntp:ntp:4.2.8:p4:*:*:*:*:*:*\",\"matchCriteriaId\":\"99C71C00-7222-483B-AEFB-159337BD3C92\"}]}]}],\"references\":[{\"url\":\"http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183647.html\",\"source\":\"cret@cert.org\"},{\"url\":\"http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184669.html\",\"source\":\"cret@cert.org\"},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00034.html\",\"source\":\"cret@cert.org\"},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00037.html\",\"source\":\"cret@cert.org\"},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00052.html\",\"source\":\"cret@cert.org\"},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00001.html\",\"source\":\"cret@cert.org\"},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00020.html\",\"source\":\"cret@cert.org\"},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html\",\"source\":\"cret@cert.org\"},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html\",\"source\":\"cret@cert.org\"},{\"url\":\"http://lists.opensuse.org/opensuse-updates/2016-05/msg00114.html\",\"source\":\"cret@cert.org\"},{\"url\":\"http://packetstormsecurity.com/files/136864/Slackware-Security-Advisory-ntp-Updates.html\",\"source\":\"cret@cert.org\"},{\"url\":\"http://rhn.redhat.com/errata/RHSA-2016-1552.html\",\"source\":\"cret@cert.org\"},{\"url\":\"http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160428-ntpd\",\"source\":\"cret@cert.org\"},{\"url\":\"http://www.debian.org/security/2016/dsa-3629\",\"source\":\"cret@cert.org\"},{\"url\":\"http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html\",\"source\":\"cret@cert.org\"},{\"url\":\"http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html\",\"source\":\"cret@cert.org\"},{\"url\":\"http://www.securityfocus.com/archive/1/538233/100/0/threaded\",\"source\":\"cret@cert.org\"},{\"url\":\"http://www.securityfocus.com/archive/1/archive/1/538233/100/0/threaded\",\"source\":\"cret@cert.org\"},{\"url\":\"http://www.securityfocus.com/bid/88261\",\"source\":\"cret@cert.org\"},{\"url\":\"http://www.securitytracker.com/id/1035705\",\"source\":\"cret@cert.org\"},{\"url\":\"http://www.talosintelligence.com/reports/TALOS-2016-0084/\",\"source\":\"cret@cert.org\",\"tags\":[\"Technical 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Advisory\"]},{\"url\":\"http://www.ubuntu.com/usn/USN-3096-1\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2016:1141\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://security.gentoo.org/glsa/201607-15\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://security.netapp.com/advisory/ntap-20171004-0002/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11\",\"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.arista.com/en/support/advisories-notices/security-advisories/1332-security-advisory-19\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://www.debian.org/security/2016/dsa-3629\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://www.kb.cert.org/vuls/id/718152\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://www.talosintelligence.com/vulnerability_reports/TALOS-2016-0084\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2026-05-06T22:49:44+00:00",
"cve": "CVE-2016-1550",
"id": "CVE-2016-1550",
"initial_release_date": "2016-04-26T00:00:00+00:00",
"product_status:fixed": "368",
"product_status:known_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "ntp: libntp message digest disclosure",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2016/cve-2016-1550.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-04T01:06:43Z",
"cve": "CVE-2016-1550",
"id": "CVE-2016-1550",
"initial_release_date": "2023-02-15T05:08:14Z",
"product_status:known_affected": "30",
"product_status:recommended": "112",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2016-1550",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2016-1550.json",
"version": "17"
}
}
}
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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.
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.
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