CVE-2015-7974

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    CVE-2015-7974

    Published: 26 Jan 2016Last Modified: 16 Apr 2026

    Summary:

    Details: NTP 4.x before 4.2.8p6 and 4.3.x before 4.3.90 do not verify peer associations of symmetric keys when authenticating packets, which might allow remote attackers to conduct impersonation attacks via an arbitrary trusted key, aka a "skeleton key."

    References: http://bugs.ntp.org/show_bug.cgi?id=2936, http://rhn.redhat.com/errata/RHSA-2016-2583.html, http://support.ntp.org/bin/view/Main/NtpBug2936, http://www.debian.org/security/2016/dsa-3629, http://www.securityfocus.com/bid/81960, http://www.securitytracker.com/id/1034782, http://www.talosintel.com/reports/TALOS-2016-0071/, https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf, https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03750en_us, https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03766en_us, https://security.FreeBSD.org/advisories/FreeBSD-SA-16:09.ntp.asc, https://security.gentoo.org/glsa/201607-15, https://security.netapp.com/advisory/ntap-20171031-0001/, https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11, http://www.talosintel.com/reports/TALOS-2016-0071/, http://bugs.ntp.org/show_bug.cgi?id=2936

    Affected packages

    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
    CVE-2015-7974 | CVE-DB