CVE-2016-4955 (GCVE-0-2016-4955)

Vulnerability from cvelistv5 – Published: 2016-07-05 01:00 – Updated: 2024-08-06 00:46
VLAI
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.
Severity
No CVSS data available.
CWE
  • n/a
Assigner
References
URL Tags
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
http://www.ubuntu.com/usn/USN-3096-1 vendor-advisoryx_refsource_UBUNTU
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
https://security.FreeBSD.org/advisories/FreeBSD-S… vendor-advisoryx_refsource_FREEBSD
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
http://www.securityfocus.com/bid/91007 vdb-entryx_refsource_BID
http://support.ntp.org/bin/view/Main/NtpBug3043 x_refsource_CONFIRM
http://www.securitytracker.com/id/1036037 vdb-entryx_refsource_SECTRACK
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
http://www.oracle.com/technetwork/topics/security… x_refsource_CONFIRM
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
http://bugs.ntp.org/3043 x_refsource_CONFIRM
http://www.kb.cert.org/vuls/id/321640 third-party-advisoryx_refsource_CERT-VN
http://support.ntp.org/bin/view/Main/SecurityNotice x_refsource_CONFIRM
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
https://security.gentoo.org/glsa/201607-15 vendor-advisoryx_refsource_GENTOO
http://packetstormsecurity.com/files/137321/Slack… x_refsource_MISC
http://tools.cisco.com/security/center/content/Ci… vendor-advisoryx_refsource_CISCO
http://packetstormsecurity.com/files/137322/FreeB… x_refsource_MISC
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
http://www.securityfocus.com/archive/1/538599/100… mailing-listx_refsource_BUGTRAQ
http://www.securityfocus.com/archive/1/538600/100… mailing-listx_refsource_BUGTRAQ
https://www.kb.cert.org/vuls/id/321640 third-party-advisoryx_refsource_CERT-VN
http://www.securityfocus.com/archive/1/archive/1/… mailing-listx_refsource_BUGTRAQ
http://www.securityfocus.com/archive/1/archive/1/… mailing-listx_refsource_BUGTRAQ
https://cert-portal.siemens.com/productcert/pdf/s… x_refsource_CONFIRM
https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11 x_refsource_MISC
Date Public
2016-06-02 00:00
Show details on NVD website
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              "name": "SUSE-SU-2016:1912",
              "refsource": "SUSE",
              "url": "http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html"
            },
            {
              "name": "FEDORA-2016-89e0874533",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ORAMN3Q7TVJ54MBYF75XCJOE3DP7LYHT/"
            },
            {
              "name": "91007",
              "refsource": "BID",
              "url": "http://www.securityfocus.com/bid/91007"
            },
            {
              "name": "http://support.ntp.org/bin/view/Main/NtpBug3043",
              "refsource": "CONFIRM",
              "url": "http://support.ntp.org/bin/view/Main/NtpBug3043"
            },
            {
              "name": "1036037",
              "refsource": "SECTRACK",
              "url": "http://www.securitytracker.com/id/1036037"
            },
            {
              "name": "SUSE-SU-2016:1584",
              "refsource": "SUSE",
              "url": "http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.html"
            },
            {
              "name": "http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html",
              "refsource": "CONFIRM",
              "url": "http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html"
            },
            {
              "name": "SUSE-SU-2016:2094",
              "refsource": "SUSE",
              "url": "http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html"
            },
            {
              "name": "http://bugs.ntp.org/3043",
              "refsource": "CONFIRM",
              "url": "http://bugs.ntp.org/3043"
            },
            {
              "name": "VU#321640",
              "refsource": "CERT-VN",
              "url": "http://www.kb.cert.org/vuls/id/321640"
            },
            {
              "name": "http://support.ntp.org/bin/view/Main/SecurityNotice",
              "refsource": "CONFIRM",
              "url": "http://support.ntp.org/bin/view/Main/SecurityNotice"
            },
            {
              "name": "FEDORA-2016-50b0066b7f",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/K3EYJQHJZ2KTVQ7ICEFHXTLZ36MRASWX/"
            },
            {
              "name": "openSUSE-SU-2016:1636",
              "refsource": "SUSE",
              "url": "http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00040.html"
            },
            {
              "name": "SUSE-SU-2016:1563",
              "refsource": "SUSE",
              "url": "http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.html"
            },
            {
              "name": "GLSA-201607-15",
              "refsource": "GENTOO",
              "url": "https://security.gentoo.org/glsa/201607-15"
            },
            {
              "name": "http://packetstormsecurity.com/files/137321/Slackware-Security-Advisory-ntp-Updates.html",
              "refsource": "MISC",
              "url": "http://packetstormsecurity.com/files/137321/Slackware-Security-Advisory-ntp-Updates.html"
            },
            {
              "name": "20160603 Multiple Vulnerabilities in Network Time Protocol Daemon Affecting Cisco Products: June 2016",
              "refsource": "CISCO",
              "url": "http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160603-ntpd"
            },
            {
              "name": "http://packetstormsecurity.com/files/137322/FreeBSD-Security-Advisory-FreeBSD-SA-16-24.ntp.html",
              "refsource": "MISC",
              "url": "http://packetstormsecurity.com/files/137322/FreeBSD-Security-Advisory-FreeBSD-SA-16-24.ntp.html"
            },
            {
              "name": "SUSE-SU-2016:1568",
              "refsource": "SUSE",
              "url": "http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00020.html"
            },
            {
              "name": "20160604 [slackware-security] ntp (SSA:2016-155-01)",
              "refsource": "BUGTRAQ",
              "url": "http://www.securityfocus.com/archive/1/538599/100/0/threaded"
            },
            {
              "name": "20160604 FreeBSD Security Advisory FreeBSD-SA-16:24.ntp",
              "refsource": "BUGTRAQ",
              "url": "http://www.securityfocus.com/archive/1/538600/100/0/threaded"
            },
            {
              "name": "VU#321640",
              "refsource": "CERT-VN",
              "url": "https://www.kb.cert.org/vuls/id/321640"
            },
            {
              "name": "20160604 [slackware-security] ntp (SSA:2016-155-01)",
              "refsource": "BUGTRAQ",
              "url": "http://www.securityfocus.com/archive/1/archive/1/538599/100/0/threaded"
            },
            {
              "name": "20160604 FreeBSD Security Advisory FreeBSD-SA-16:24.ntp",
              "refsource": "BUGTRAQ",
              "url": "http://www.securityfocus.com/archive/1/archive/1/538600/100/0/threaded"
            },
            {
              "name": "https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf",
              "refsource": "CONFIRM",
              "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf"
            },
            {
              "name": "https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11",
              "refsource": "MISC",
              "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2016-4955",
    "datePublished": "2016-07-05T01:00:00.000Z",
    "dateReserved": "2016-05-23T00:00:00.000Z",
    "dateUpdated": "2024-08-06T00:46:39.886Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2016-4955",
      "date": "2026-10-03",
      "epss": "0.08771",
      "percentile": "0.95026"
    }
  }
}



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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.


Detection rules are retrieved from Rulezet.


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.