CVE-2016-7426 (GCVE-0-2016-7426)

Vulnerability from cvelistv5 – Published: 2017-01-13 16:00 – Updated: 2024-08-06 01:57
VLAI
Summary
NTP before 4.2.8p9 rate limits responses received from the configured sources when rate limiting for all associations is enabled, which allows remote attackers to cause a denial of service (prevent responses from the sources) by sending responses with a spoofed source address.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • n/a
Assigner
mitre CNA under the mitre root
CNA scorecard E 28/100 over 2316 records in the last 180 days details
References
Date Public
2016-11-21 00:00
Show details on NVD website
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                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "NTP before 4.2.8p9 rate limits responses received from the configured sources when rate limiting for all associations is enabled, which allows remote attackers to cause a denial of service (prevent responses from the sources) by sending responses with a spoofed source address."
          },
          {
            "lang": "es",
            "value": "NTP en versiones anteriores a 4.2.8p9 limita la clasificaci\u00f3n de respuestas recibidas desde las fuentes configuradas cuando la limitaci\u00f3n de clasificaci\u00f3n para todas las asociaciones est\u00e1 habilitado, lo que permite a atacantes remotos provocar una denegaci\u00f3n de servicio (prevenir las respuestas de las fuentes) enviando respuestas con una direcci\u00f3n de origen suplantada."
          }
        ],
        "id": "CVE-2016-7426",
        "lastModified": "2026-05-13T00:24:29.033",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "MEDIUM",
                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "PARTIAL",
                "baseScore": 4.3,
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
                "version": "2.0"
              },
              "exploitabilityScore": 8.6,
              "impactScore": 2.9,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ],
          "cvssMetricV31": [
            {
              "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": "2017-01-13T16:59:00.323",
        "references": [
          {
            "source": "cve@mitre.org",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "http://nwtime.org/ntp428p9_release/"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "http://rhn.redhat.com/errata/RHSA-2017-0252.html"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Issue Tracking",
              "Mitigation",
              "Vendor Advisory"
            ],
            "url": "http://support.ntp.org/bin/view/Main/NtpBug3071"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Release Notes",
              "Vendor Advisory"
            ],
            "url": "http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://www.securityfocus.com/bid/94451"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://www.securitytracker.com/id/1037354"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://bto.bluecoat.com/security-advisory/sa139"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US\u0026docId=emr_na-hpesbux03706en_us"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-16:39.ntp.asc"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://usn.ubuntu.com/3707-2/"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Third Party Advisory",
              "US Government Resource"
            ],
            "url": "https://www.kb.cert.org/vuls/id/633847"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
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            "url": "http://nwtime.org/ntp428p9_release/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
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          },
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          },
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              "Vendor Advisory"
            ],
            "url": "http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities"
          },
          {
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              "VDB Entry"
            ],
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          },
          {
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          },
          {
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          },
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            "url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-16:39.ntp.asc"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
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          },
          {
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            "tags": [
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              "US Government Resource"
            ],
            "url": "https://www.kb.cert.org/vuls/id/633847"
          }
        ],
        "sourceIdentifier": "cve@mitre.org",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-400"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-05-13T01:16:03+00:00",
      "cve": "CVE-2016-7426",
      "id": "CVE-2016-7426",
      "initial_release_date": "2016-11-21T00:00:00+00:00",
      "product_status:fixed": "328",
      "product_status:known_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "ntp: Client rate limiting and server responses",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2016/cve-2016-7426.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "low",
      "current_release_date": "2026-09-01T02:12:25Z",
      "cve": "CVE-2016-7426",
      "id": "CVE-2016-7426",
      "initial_release_date": "2023-02-15T04:58:21Z",
      "product_status:known_affected": "30",
      "product_status:recommended": "112",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2016-7426",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2016-7426.json",
      "version": "17"
    }
  }
}



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