{"schemaVersion":3,"id":"CVE-2016-7433","aliases":["UBUNTU-CVE-2016-7433","DEBIAN-CVE-2016-7433"],"status":"published","duplicateOf":null,"title":null,"description":"NTP before 4.2.8p9 does not properly perform the initial sync calculations, which allows remote attackers to unspecified impact via unknown vectors, related to a \"root distance that did not include the peer dispersion.\"","dates":{"published":"2017-01-13T16:00:00.000Z","modified":"2024-08-06T01:57:47.633Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.3,"severity":"medium","version":"3.0","versionLabel":"v3.0","source":"NVD","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.0","versionLabel":"v3.0","source":"NVD","score":5.3,"severity":"medium","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":5,"severity":"medium","vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","exploitability":null,"impact":null,"computed":false},{"version":"3.0","versionLabel":"v3.0","source":"OSV · Ubuntu","score":5.3,"severity":"medium","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","exploitability":10,"impact":2.3,"computed":true},{"version":"3.0","versionLabel":"v3.0","source":"OSV · Debian","score":5.3,"severity":"medium","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","exploitability":10,"impact":2.3,"computed":true}]},"epss":{"probability":0.09762,"percentile":0.95489,"severity":"low","asOf":"2026-10-18T00:00:00.000Z","change":{"pp":-0.0789999999999999,"baselineDate":"2026-09-18T00:00:00.000Z","baselineScore":0.09841},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.1028,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.09762,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.09762,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.09762,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.09762,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.09762,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.09762,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.09762,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.09762,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.09762,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.09762,"percentile":0.95489}],"last30":[{"date":"2026-09-18T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.1028,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.09841,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.09762,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.09762,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.09762,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.09762,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.09762,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.09762,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.09762,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.09762,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.09762,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.09762,"percentile":0.95489}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-682","name":"Incorrect Calculation","description":"The product performs a calculation that generates incorrect or unintended results that are later used in security-critical decisions or resource management.","type":"weakness","status":"Draft","abstraction":"Pillar","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/682.html"}],"affected":[{"vendor":"debian","product":"ntp","name":"ntp","label":"ntp","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/ntp","purlType":"deb","versions":[{"text":"< 1:4.2.8p9+dfsg-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1:4.2.8p9+dfsg-1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"ntp","name":"ntp","label":"ntp","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/ntp","purlType":"deb","versions":[{"text":"< 1:4.2.8p4+dfsg-3ubuntu5.5","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1:4.2.8p4+dfsg-3ubuntu5.5","eol":null,"hubHref":null},{"vendor":"ntp","product":"ntp","name":"ntp","label":"ntp","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≤ 4.2.8","noFixRecorded":false,"fixedIn":null}],"versionsText":"≤ 4.2.8","eol":null,"hubHref":"/vendor/ntp/ntp"}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03706en_us","label":"h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03706en_us","hostname":"h20566.www2.hpe.com","tags":["X Refsource CONFIRM"]},{"url":"http://rhn.redhat.com/errata/RHSA-2017-0252.html","label":"rhn.redhat.com/errata/RHSA-2017-0252.html","hostname":"rhn.redhat.com","tags":["Vendor Advisory","X Refsource REDHAT"]},{"url":"http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities","label":"support.ntp.org/bin/view/Main/SecurityNotice","hostname":"support.ntp.org","tags":["X Refsource CONFIRM","Vendor Advisory"]},{"url":"http://nwtime.org/ntp428p9_release/","label":"nwtime.org/ntp428p9_release/","hostname":"nwtime.org","tags":["X Refsource CONFIRM","Release Notes","Vendor Advisory"]},{"url":"https://www.kb.cert.org/vuls/id/633847","label":"www.kb.cert.org/vuls/id/633847","hostname":"www.kb.cert.org","tags":["Third Party Advisory","X Refsource CERT VN","US Government Resource"]},{"url":"http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html","label":"www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html","hostname":"www.oracle.com","tags":["X Refsource CONFIRM"]},{"url":"http://www.securitytracker.com/id/1037354","label":"www.securitytracker.com/id/1037354","hostname":"www.securitytracker.com","tags":["VDB Entry","X Refsource SECTRACK"]},{"url":"https://bto.bluecoat.com/security-advisory/sa139","label":"bto.bluecoat.com/security-advisory/sa139","hostname":"bto.bluecoat.com","tags":["X Refsource CONFIRM"]},{"url":"http://www.securityfocus.com/bid/94455","label":"www.securityfocus.com/bid/94455","hostname":"www.securityfocus.com","tags":["VDB Entry","X Refsource BID"]},{"url":"https://security.FreeBSD.org/advisories/FreeBSD-SA-16:39.ntp.asc","label":"security.freebsd.org/advisories/FreeBSD-SA-16:39.ntp.asc","hostname":"security.freebsd.org","tags":["Vendor Advisory","X Refsource FREEBSD"]},{"url":"http://support.ntp.org/bin/view/Main/NtpBug3067","label":"support.ntp.org/bin/view/Main/NtpBug3067","hostname":"support.ntp.org","tags":["X Refsource CONFIRM","Issue Tracking","Mitigation","Vendor Advisory"]},{"url":"http://www.securityfocus.com/archive/1/540254/100/0/threaded","label":"www.securityfocus.com/archive/1/540254/100/0/threaded","hostname":"www.securityfocus.com","tags":["Mailing List","X Refsource BUGTRAQ"]},{"url":"http://www.securityfocus.com/archive/1/archive/1/540254/100/0/threaded","label":"www.securityfocus.com/archive/1/archive/1/540254/100/0/threaded","hostname":"www.securityfocus.com","tags":["Mailing List","X Refsource BUGTRAQ"]},{"url":"http://lists.opensuse.org/opensuse-updates/2016-12/msg00153.html","label":"lists.opensuse.org/opensuse-updates/2016-12/msg00153.html","hostname":"lists.opensuse.org","tags":["Vendor Advisory","X Refsource SUSE"]},{"url":"http://www.ubuntu.com/usn/USN-3349-1","label":"www.ubuntu.com/usn/USN-3349-1","hostname":"www.ubuntu.com","tags":["Vendor Advisory","X Refsource UBUNTU"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PABKEYX6ABBFJZGMXKH57X756EJUDS3C/","label":"lists.fedoraproject.org/archives/…","hostname":"lists.fedoraproject.org","tags":["Vendor Advisory","X Refsource FEDORA"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U5E3XBBCK5IXOLDAH2E4M3QKIYIHUMMP/","label":"lists.fedoraproject.org/archives/…","hostname":"lists.fedoraproject.org","tags":["Vendor Advisory","X Refsource FEDORA"]},{"url":"http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20171129-01-ntpd-en","label":"www.huawei.com/en/psirt/security-advisories/huawei-sa-20171129-01-ntpd-en","hostname":"www.huawei.com","tags":["X Refsource CONFIRM"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ILMSYVQMMF37MANYEO7KBHOPSC74EKGN/","label":"lists.fedoraproject.org/archives/…","hostname":"lists.fedoraproject.org","tags":["Vendor Advisory","X Refsource FEDORA"]},{"url":"https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2017-227/","label":"www.broadcom.com/support/…","hostname":"www.broadcom.com","tags":["X Refsource CONFIRM"]},{"url":"http://www.securityfocus.com/archive/1/539955/100/0/threaded","label":"www.securityfocus.com/archive/1/539955/100/0/threaded","hostname":"www.securityfocus.com","tags":["Mailing List","X Refsource BUGTRAQ"]},{"url":"https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2017-227","label":"www.broadcom.com/support/…","hostname":"www.broadcom.com","tags":["X Refsource CONFIRM"]},{"url":"http://www.securityfocus.com/archive/1/archive/1/539955/100/0/threaded","label":"www.securityfocus.com/archive/1/archive/1/539955/100/0/threaded","hostname":"www.securityfocus.com","tags":["Mailing List","X Refsource BUGTRAQ"]},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf","label":"cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf","hostname":"cert-portal.siemens.com","tags":["X Refsource CONFIRM"]},{"url":"https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11","label":"us-cert.cisa.gov/ics/advisories/icsa-21-159-11","hostname":"us-cert.cisa.gov","tags":["X Refsource MISC"]},{"url":"https://ubuntu.com/security/CVE-2016-7433","label":"ubuntu.com/security/CVE-2016-7433","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/notices/USN-3349-1","label":"ubuntu.com/security/notices/USN-3349-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2016-7433","label":"www.cve.org/CVERecord?id=CVE-2016-7433","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2016-7433","label":"security-tracker.debian.org/tracker/CVE-2016-7433","hostname":"security-tracker.debian.org","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":["OPENSUSE-SU-2024:10181-1","RHSA-2017:0252","SUSE-SU-2016:3193-1","SUSE-SU-2016:3195-1","SUSE-SU-2016:3196-1","SUSE-SU-2017:0255-1","USN-3349-1"],"duplicates":[],"related":["OPENSUSE-SU-2024:10181-1","SUSE-SU-2016:3193-1","SUSE-SU-2016:3195-1","SUSE-SU-2016:3196-1","SUSE-SU-2017:0255-1","USN-3349-1"]},"timeline":[{"kind":"published","date":"2017-01-13T16:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-06T01:57:47.633Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":23,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T09:39:11.303Z","stale":false,"partial":false}}