FKIE_CVE-2016-4957

Vulnerability from fkie_nvd - Published: 2016-07-05 01:59 - Updated: 2026-06-17 00:48
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
ntpd in NTP before 4.2.8p8 allows remote attackers to cause a denial of service (daemon crash) via a crypto-NAK packet. NOTE: this vulnerability exists because of an incorrect fix for CVE-2016-1547.
References
cve@mitre.orghttp://bugs.ntp.org/3046Issue Tracking, Vendor Advisory
cve@mitre.orghttp://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.htmlMailing List, Third Party Advisory
cve@mitre.orghttp://lists.opensuse.org/opensuse-security-announce/2016-06/msg00023.htmlMailing List, Third Party Advisory
cve@mitre.orghttp://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.htmlMailing List, Third Party Advisory
cve@mitre.orghttp://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.htmlMailing List, Third Party Advisory
cve@mitre.orghttp://lists.opensuse.org/opensuse-security-announce/2016-06/msg00040.htmlMailing List, Third Party Advisory
cve@mitre.orghttp://support.ntp.org/bin/view/Main/NtpBug3046Patch, Vendor Advisory
cve@mitre.orghttp://support.ntp.org/bin/view/Main/SecurityNoticeRelease Notes, Vendor Advisory
cve@mitre.orghttp://www.kb.cert.org/vuls/id/321640Third Party Advisory, US Government Resource
cve@mitre.orghttp://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.htmlThird Party Advisory
cve@mitre.orghttp://www.securitytracker.com/id/1036037Third Party Advisory, VDB Entry
cve@mitre.orghttps://security.FreeBSD.org/advisories/FreeBSD-SA-16:24.ntp.ascThird Party Advisory
cve@mitre.orghttps://security.gentoo.org/glsa/201607-15Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://bugs.ntp.org/3046Issue Tracking, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00023.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00040.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://support.ntp.org/bin/view/Main/NtpBug3046Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://support.ntp.org/bin/view/Main/SecurityNoticeRelease Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.kb.cert.org/vuls/id/321640Third Party Advisory, US Government Resource
af854a3a-2127-422b-91ae-364da2661108http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.htmlThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1036037Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108https://security.FreeBSD.org/advisories/FreeBSD-SA-16:24.ntp.ascThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/201607-15Third Party Advisory
Impacted products
Vendor Product Version
ntp ntp 4.2.8
ntp ntp 4.3.92
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
To clipboard 

{
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    {
      "affectedData": [
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          "vendor": "n/a",
          "versions": [
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              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "ntpd in NTP before 4.2.8p8 allows remote attackers to cause a denial of service (daemon crash) via a crypto-NAK packet.  NOTE: this vulnerability exists because of an incorrect fix for CVE-2016-1547."
    },
    {
      "lang": "es",
      "value": "ntpd en NTP en versiones anteriores a 4.2.8p8 permite a atacantes remotos provocar una denegaci\u00f3n de servicio (ca\u00edda del demonio) a trav\u00e9s de un paquete crypto-NAK. NOTA: esta vulnerabilidad existe debido a una soluci\u00f3n incorrecta para CVE-2016-1547."
    }
  ],
  "id": "CVE-2016-4957",
  "lastModified": "2026-06-17T00:48:30.253",
  "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
      }
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    "cvssMetricV31": [
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2016-07-05T01:59:04.283",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
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      "url": "http://bugs.ntp.org/3046"
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  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "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.
  • 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.
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  • 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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