{"schemaVersion":3,"id":"CVE-2016-0727","aliases":["UBUNTU-CVE-2016-0727","DEBIAN-CVE-2016-0727"],"status":"published","duplicateOf":null,"title":null,"description":"The crontab script in the ntp package before 1:4.2.6.p3+dfsg-1ubuntu3.11 on Ubuntu 12.04 LTS, before 1:4.2.6.p5+dfsg-3ubuntu2.14.04.10 on Ubuntu 14.04 LTS, on Ubuntu Wily, and before 1:4.2.8p4+dfsg-3ubuntu5.3 on Ubuntu 16.04 LTS allows local users with access to the ntp account to write to arbitrary files and consequently gain privileges via vectors involving statistics directory cleanup.","dates":{"published":"2017-04-14T18:00:00.000Z","modified":"2024-08-05T22:30:03.949Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.8,"severity":"high","version":"3.0","versionLabel":"v3.0","source":"NVD","vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.0","versionLabel":"v3.0","source":"NVD","score":7.8,"severity":"high","vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":7.2,"severity":"high","vector":"AV:L/AC:L/Au:N/C:C/I:C/A:C","exploitability":null,"impact":null,"computed":false},{"version":"3.0","versionLabel":"v3.0","source":"OSV · Ubuntu","score":7.8,"severity":"high","vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","exploitability":4.6,"impact":9.8,"computed":true},{"version":"3.0","versionLabel":"v3.0","source":"OSV · Debian","score":7.8,"severity":"high","vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","exploitability":4.6,"impact":9.8,"computed":true}]},"epss":{"probability":0.01254,"percentile":0.69052,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.01254},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01214,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01254,"percentile":0.69052}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01214,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01254,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01254,"percentile":0.69052}]},"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":[{"id":"REF_40B6373E79804501","name":"Exploit Reference (packetstormsecurity.com)","source":"reference","url":"http://packetstormsecurity.com/files/141913/NTP-Privilege-Escalation.html","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null},{"id":"41764","name":"NTP - Local Privilege Escalation","source":"exploit-database","url":"https://www.exploit-db.com/exploits/41764","maturity":"poc","reliabilityScore":0.5,"verified":false,"type":"local","platforms":["linux"],"requiresAuth":null,"exploitdb":{"verified":false,"type":"local","platform":"linux","file":"exploits/linux/local/41764.txt","codes":["CVE-2016-0727"]},"metasploit":null}],"exploitCount":2,"weaknesses":[{"id":"CWE-264","name":"Permissions, Privileges, and Access Controls","description":"Weaknesses in this category are related to the management of permissions, privileges, and other security features that are used to perform access control.","type":"category","status":"Obsolete","abstraction":null,"likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/264.html"}],"affected":[{"vendor":"canonical","product":"ubuntu_linux","name":"ubuntu linux","label":"ubuntu_linux","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"12.04","noFixRecorded":false,"fixedIn":null},{"text":"14.04","noFixRecorded":false,"fixedIn":null},{"text":"16.04","noFixRecorded":false,"fixedIn":null}],"versionsText":"12.04 | 14.04 | 16.04","eol":{"isEol":true,"eolDate":"2017-04-28T00:00:00.000Z","matchMethod":"cpe","cycle":{"name":"12.04","label":"12.04 'Precise Pangolin' (LTS)","eolFrom":"2017-04-28T00:00:00.000Z","isLts":true,"isMaintained":false,"latestVersion":"12.04.5"},"product":{"name":"ubuntu","label":"Ubuntu","category":"os"}},"hubHref":"/vendor/canonical/ubuntu_linux"},{"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-2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1:4.2.8p9+dfsg-2","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":"< 1:4.2.6.p5+dfsg-3ubuntu2.14.04.10","noFixRecorded":false,"fixedIn":null},{"text":"< 1:4.2.8p4+dfsg-3ubuntu5.3","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1:4.2.6.p5+dfsg-3ubuntu2.14.04.10 | < 1:4.2.8p4+dfsg-3ubuntu5.3","eol":null,"hubHref":null}],"affectedCount":3,"eol":{"hasEol":true,"count":1},"references":[{"url":"http://www.ubuntu.com/usn/USN-3096-1","label":"www.ubuntu.com/usn/USN-3096-1","hostname":"www.ubuntu.com","tags":["Vendor Advisory","X Refsource UBUNTU"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1382369","label":"bugzilla.redhat.com/show_bug.cgi?id=1382369","hostname":"bugzilla.redhat.com","tags":["X Refsource CONFIRM","Issue Tracking"]},{"url":"http://www.securitytracker.com/id/1034808","label":"www.securitytracker.com/id/1034808","hostname":"www.securitytracker.com","tags":["VDB Entry","X Refsource SECTRACK","Third Party Advisory"]},{"url":"http://packetstormsecurity.com/files/141913/NTP-Privilege-Escalation.html","label":"packetstormsecurity.com/files/141913/NTP-Privilege-Escalation.html","hostname":"packetstormsecurity.com","tags":["X Refsource MISC","Exploit","Third Party Advisory","VDB Entry"]},{"url":"http://www.securityfocus.com/bid/81552","label":"www.securityfocus.com/bid/81552","hostname":"www.securityfocus.com","tags":["VDB Entry","X Refsource BID","Third Party Advisory"]},{"url":"https://bugs.launchpad.net/ubuntu/+source/ntp/+bug/1528050","label":"bugs.launchpad.net/ubuntu/+source/ntp/+bug/1528050","hostname":"bugs.launchpad.net","tags":["X Refsource CONFIRM","Issue Tracking","Patch","Vendor Advisory"]},{"url":"https://ubuntu.com/security/CVE-2016-0727","label":"ubuntu.com/security/CVE-2016-0727","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"http://www.halfdog.net/Security/2015/NtpCronjobUserNtpToRootPrivilegeEscalation/","label":"www.halfdog.net/Security/2015/NtpCronjobUserNtpToRootPrivilegeEscalation/","hostname":"www.halfdog.net","tags":["REPORT"]},{"url":"https://ubuntu.com/security/notices/USN-3096-1","label":"ubuntu.com/security/notices/USN-3096-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2016-0727","label":"www.cve.org/CVERecord?id=CVE-2016-0727","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2016-0727","label":"security-tracker.debian.org/tracker/CVE-2016-0727","hostname":"security-tracker.debian.org","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":["USN-3096-1"],"duplicates":[],"related":["USN-3096-1"]},"timeline":[{"kind":"published","date":"2017-04-14T18:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-05T22:30:03.949Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":41,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T16:09:57.476Z","stale":false,"partial":false}}