CVE-2016-1550 (GCVE-0-2016-1550)

Vulnerability from cvelistv5 – Published: 2017-01-06 21:00 – Updated: 2024-08-05 23:02
VLAI
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)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CWE
  • unspecified
Assigner
certcc CNA under the mitre root
CNA scorecard E 42/100 over 172 records in the last 180 days details
References
URL Tags
http://www.ubuntu.com/usn/USN-3096-1 vendor-advisoryx_refsource_UBUNTU
http://www.debian.org/security/2016/dsa-3629 vendor-advisoryx_refsource_DEBIAN
http://www.oracle.com/technetwork/topics/security… x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2016:1141 vendor-advisoryx_refsource_REDHAT
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
https://www.kb.cert.org/vuls/id/718152 third-party-advisoryx_refsource_CERT-VN
http://rhn.redhat.com/errata/RHSA-2016-1552.html vendor-advisoryx_refsource_REDHAT
http://www.securitytracker.com/id/1035705 vdb-entryx_refsource_SECTRACK
http://www.oracle.com/technetwork/topics/security… x_refsource_CONFIRM
https://security.netapp.com/advisory/ntap-2017100… x_refsource_CONFIRM
http://www.talosintelligence.com/reports/TALOS-20… x_refsource_MISC
http://tools.cisco.com/security/center/content/Ci… vendor-advisoryx_refsource_CISCO
https://security.FreeBSD.org/advisories/FreeBSD-S… vendor-advisoryx_refsource_FREEBSD
http://www.securityfocus.com/bid/88261 vdb-entryx_refsource_BID
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
http://lists.opensuse.org/opensuse-updates/2016-0… vendor-advisoryx_refsource_SUSE
https://security.gentoo.org/glsa/201607-15 vendor-advisoryx_refsource_GENTOO
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
http://packetstormsecurity.com/files/136864/Slack… x_refsource_MISC
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
http://lists.fedoraproject.org/pipermail/package-… vendor-advisoryx_refsource_FEDORA
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
https://www.debian.org/security/2016/dsa-3629 vendor-advisoryx_refsource_DEBIAN
https://www.talosintelligence.com/vulnerability_r… x_refsource_MISC
http://www.securityfocus.com/archive/1/538233/100… mailing-listx_refsource_BUGTRAQ
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
http://www.securityfocus.com/archive/1/archive/1/… mailing-listx_refsource_BUGTRAQ
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
http://lists.fedoraproject.org/pipermail/package-… vendor-advisoryx_refsource_FEDORA
https://cert-portal.siemens.com/productcert/pdf/s… x_refsource_CONFIRM
https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11 x_refsource_MISC
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
https://www.arista.com/en/support/advisories-noti… x_refsource_MISC
Impacted products
Vendor Product Version CPE status
NTP Project NTP Affected: 4.2.8p3
Affected: 4.2.8p4
guessed Create a notification for this product.
NTPsec Project NTPSec Affected: a5fb34b9cc89b92a8fef2f459004865c93bb7f92
guessed Create a notification for this product.
Date Public
2016-04-26 00:00
Show details on NVD website
To clipboard 

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      ],
      "sourceIdentifier": "cret@cert.org",
      "vulnStatus": "Modified",
      "weaknesses": [
        {
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            {
              "lang": "en",
              "value": "CWE-200"
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          ],
          "source": "nvd@nist.gov",
          "type": "Primary"
        }
      ]
    },
    "nvd": {
      "cve": {
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:ntp:ntp:4.2.8:p4:*:*:*:*:*:*",
                    "matchCriteriaId": "99C71C00-7222-483B-AEFB-159337BD3C92",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "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. Un atacante puede enviar series de mensajes manipulados para intentar el mensaje de direcci\u00f3n de clave."
          }
        ],
        "id": "CVE-2016-1550",
        "lastModified": "2026-05-06T22:30:45.220",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "LOW",
                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "NONE",
                "baseScore": 5.0,
                "confidentialityImpact": "PARTIAL",
                "integrityImpact": "NONE",
                "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
                "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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          ],
          "cvssMetricV30": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 5.3,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "LOW",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
                "version": "3.0"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 1.4,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2017-01-06T21:59:00.413",
        "references": [
          {
            "source": "cret@cert.org",
            "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"
          },
          {
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            "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"
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            "url": "http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html"
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          {
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            "url": "http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html"
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          {
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            "url": "http://www.securityfocus.com/archive/1/538233/100/0/threaded"
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          {
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            "url": "http://www.ubuntu.com/usn/USN-3096-1"
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            "url": "https://access.redhat.com/errata/RHSA-2016:1141"
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          {
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        ],
        "sourceIdentifier": "cret@cert.org",
        "vulnStatus": "Modified",
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              {
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                "value": "CWE-200"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
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        ]
      }
    },
    "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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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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