FKIE_CVE-2016-1547

Vulnerability from fkie_nvd - Published: 2017-01-06 21:59 - Updated: 2026-06-17 00:42
Severity
5.3 (Medium) - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Summary
An off-path attacker can cause a preemptible client association to be demobilized in NTP 4.2.8p4 and earlier and NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 by sending a crypto NAK packet to a victim client with a spoofed source address of an existing associated peer. This is true even if authentication is enabled.
References
cret@cert.orghttp://rhn.redhat.com/errata/RHSA-2016-1552.html
cret@cert.orghttp://www.debian.org/security/2016/dsa-3629
cret@cert.orghttp://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
cret@cert.orghttp://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
cret@cert.orghttp://www.securityfocus.com/bid/88276
cret@cert.orghttp://www.securitytracker.com/id/1035705
cret@cert.orghttp://www.talosintelligence.com/reports/TALOS-2016-0081/Mitigation, Technical Description, Third Party Advisory
cret@cert.orghttps://access.redhat.com/errata/RHSA-2016:1141
cret@cert.orghttps://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf
cret@cert.orghttps://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf
cret@cert.orghttps://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc
cret@cert.orghttps://security.gentoo.org/glsa/201607-15
cret@cert.orghttps://security.netapp.com/advisory/ntap-20171004-0002/
cret@cert.orghttps://us-cert.cisa.gov/ics/advisories/icsa-21-103-11
cret@cert.orghttps://www.arista.com/en/support/advisories-notices/security-advisories/1332-security-advisory-19
af854a3a-2127-422b-91ae-364da2661108http://rhn.redhat.com/errata/RHSA-2016-1552.html
af854a3a-2127-422b-91ae-364da2661108http://www.debian.org/security/2016/dsa-3629
af854a3a-2127-422b-91ae-364da2661108http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
af854a3a-2127-422b-91ae-364da2661108http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/88276
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1035705
af854a3a-2127-422b-91ae-364da2661108http://www.talosintelligence.com/reports/TALOS-2016-0081/Mitigation, Technical Description, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2016:1141
af854a3a-2127-422b-91ae-364da2661108https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf
af854a3a-2127-422b-91ae-364da2661108https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf
af854a3a-2127-422b-91ae-364da2661108https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/201607-15
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20171004-0002/
af854a3a-2127-422b-91ae-364da2661108https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11
af854a3a-2127-422b-91ae-364da2661108https://www.arista.com/en/support/advisories-notices/security-advisories/1332-security-advisory-19
Impacted products
Vendor Product Version
ntp ntp *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "NTP",
          "vendor": "NTP Project",
          "versions": [
            {
              "status": "affected",
              "version": "4.2.8p3"
            },
            {
              "status": "affected",
              "version": "4.2.8p4"
            }
          ]
        },
        {
          "product": "NTPSec",
          "vendor": "NTPsec Project",
          "versions": [
            {
              "status": "affected",
              "version": "a5fb34b9cc89b92a8fef2f459004865c93bb7f92"
            }
          ]
        }
      ],
      "source": "cret@cert.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:ntp:ntp:*:p4:*:*:*:*:*:*",
              "matchCriteriaId": "05D076CA-85DD-48B4-9A8A-F413FFBFB55F",
              "versionEndIncluding": "4.2.8",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An off-path attacker can cause a preemptible client association to be demobilized in NTP 4.2.8p4 and earlier and NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 by sending a crypto NAK packet to a victim client with a spoofed source address of an existing associated peer. This is true even if authentication is enabled."
    },
    {
      "lang": "es",
      "value": "Un atacante fuera de ruta puede provocar que una asociaci\u00f3n de clientes preventiva sea desmovilizada en NTP 4.2.8p4 y versiones anteriores y NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 enviando un paquete NAK encriptado a un cliente v\u00edctima con una direcci\u00f3n fuente suplantada de un asociado existente. Esto es cierto incluso si la autenticaci\u00f3n est\u00e1 habilitada."
    }
  ],
  "id": "CVE-2016-1547",
  "lastModified": "2026-06-17T00:42:08.537",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 5.0,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
          "version": "3.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2017-01-06T21:59:00.320",
  "references": [
    {
      "source": "cret@cert.org",
      "url": "http://rhn.redhat.com/errata/RHSA-2016-1552.html"
    },
    {
      "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/bid/88276"
    },
    {
      "source": "cret@cert.org",
      "url": "http://www.securitytracker.com/id/1035705"
    },
    {
      "source": "cret@cert.org",
      "tags": [
        "Mitigation",
        "Technical Description",
        "Third Party Advisory"
      ],
      "url": "http://www.talosintelligence.com/reports/TALOS-2016-0081/"
    },
    {
      "source": "cret@cert.org",
      "url": "https://access.redhat.com/errata/RHSA-2016:1141"
    },
    {
      "source": "cret@cert.org",
      "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf"
    },
    {
      "source": "cret@cert.org",
      "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf"
    },
    {
      "source": "cret@cert.org",
      "url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc"
    },
    {
      "source": "cret@cert.org",
      "url": "https://security.gentoo.org/glsa/201607-15"
    },
    {
      "source": "cret@cert.org",
      "url": "https://security.netapp.com/advisory/ntap-20171004-0002/"
    },
    {
      "source": "cret@cert.org",
      "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11"
    },
    {
      "source": "cret@cert.org",
      "url": "https://www.arista.com/en/support/advisories-notices/security-advisories/1332-security-advisory-19"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://rhn.redhat.com/errata/RHSA-2016-1552.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.debian.org/security/2016/dsa-3629"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.securityfocus.com/bid/88276"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.securitytracker.com/id/1035705"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mitigation",
        "Technical Description",
        "Third Party Advisory"
      ],
      "url": "http://www.talosintelligence.com/reports/TALOS-2016-0081/"
    },
    {
      "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://www.arista.com/en/support/advisories-notices/security-advisories/1332-security-advisory-19"
    }
  ],
  "sourceIdentifier": "cret@cert.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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