CVE-2018-7170

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    CVE-2018-7170

    Published: 6 Mar 2018Last Modified: 16 Apr 2026

    Summary:

    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.

    References: http://packetstormsecurity.com/files/146631/Slackware-Security-Advisory-ntp-Updates.html, http://support.ntp.org/bin/view/Main/NtpBug3415, https://security.FreeBSD.org/advisories/FreeBSD-SA-18:02.ntp.asc, https://security.gentoo.org/glsa/201805-12, https://www.synology.com/support/security/Synology_SA_18_13, http://www.securityfocus.com/archive/1/541824/100/0/threaded, http://www.securityfocus.com/bid/103194, https://security.netapp.com/advisory/ntap-20180626-0001/, https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03962en_us, https://bugzilla.redhat.com/show_bug.cgi?id=1550214

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High