{"id":"CVE-2018-7170","details":"ntpd in ntp 4.2.x before 4.2.8p7 and 4.3.x before 4.3.92 allows authenticated users that know the private symmetric key to create arbitrarily-many ephemeral associations in order to win the clock selection of ntpd and modify a victim's clock via a Sybil attack. This issue exists because of an incomplete fix for CVE-2016-1549.","modified":"2026-04-16T01:39:57.215675794Z","published":"2018-03-06T20:29:01.297Z","related":["SUSE-SU-2018:0808-1","SUSE-SU-2018:0956-1","SUSE-SU-2018:1464-1","SUSE-SU-2018:1765-1","SUSE-SU-2018:1765-2","SUSE-SU-2018:3342-1","SUSE-SU-2018:3342-2","SUSE-SU-2018:3351-1","SUSE-SU-2018:3352-1","SUSE-SU-2018:3356-1","SUSE-SU-2018:3386-1","openSUSE-SU-2024:11102-1"],"references":[{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20180626-0001/"},{"type":"ADVISORY","url":"https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03962en_us"},{"type":"ADVISORY","url":"https://www.synology.com/support/security/Synology_SA_18_13"},{"type":"ADVISORY","url":"http://packetstormsecurity.com/files/146631/Slackware-Security-Advisory-ntp-Updates.html"},{"type":"ADVISORY","url":"http://support.ntp.org/bin/view/Main/NtpBug3415"},{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/103194"},{"type":"ADVISORY","url":"https://security.FreeBSD.org/advisories/FreeBSD-SA-18:02.ntp.asc"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/201805-12"},{"type":"ADVISORY","url":"http://www.securityfocus.com/archive/1/541824/100/0/threaded"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1550214"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"4.2.0"},{"fixed":"4.2.8"}]},{"events":[{"introduced":"4.3.0"},{"fixed":"4.3.92"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-NA"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p1"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p1\\-beta1"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p1\\-beta2"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p1\\-beta3"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p1\\-beta4"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p1\\-beta5"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p1\\-rc1"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p1\\-rc2"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p2"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p2\\-rc1"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p2\\-rc2"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p2\\-rc3"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p3"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p3\\-rc1"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p3\\-rc2"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p3\\-rc3"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p4"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p5"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p6"}]},{"events":[{"introduced":"1.1"},{"fixed":"1.1.6-6931-3"}]},{"events":[{"introduced":"0"},{"fixed":"6.1.5-15254"}]},{"events":[{"introduced":"0"},{"fixed":"6.1.6-15266"}]},{"events":[{"introduced":"5.2"},{"fixed":"6.1.6-15266"}]},{"events":[{"introduced":"0"},{"fixed":"2.2.3-1505"}]},{"events":[{"introduced":"0"},{"fixed":"c.4.2.8.4.0"}]}],"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-7170.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N"}]}