CVE-2014-9751

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    CVE-2014-9751

    Published: 6 Oct 2015Last Modified: 10 Apr 2026

    Summary:

    Details: The read_network_packet function in ntp_io.c in ntpd in NTP 4.x before 4.2.8p1 on Linux and OS X does not properly determine whether a source IP address is an IPv6 loopback address, which makes it easier for remote attackers to spoof restricted packets, and read or write to the runtime state, by leveraging the ability to reach the ntpd machine's network interface with a packet from the ::1 address.

    References: http://bugs.ntp.org/show_bug.cgi?id=2672, http://rhn.redhat.com/errata/RHSA-2015-1459.html, http://support.ntp.org/bin/view/Main/SecurityNotice#December_2014_NTP_Security_Vulne, http://www.debian.org/security/2015/dsa-3388, http://www.kb.cert.org/vuls/id/852879, http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html, http://www.securityfocus.com/bid/72584, https://bugzilla.redhat.com/show_bug.cgi?id=1184572, https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03886en_us, http://bugs.ntp.org/show_bug.cgi?id=2672, http://bugs.ntp.org/show_bug.cgi?id=2672, https://bugzilla.redhat.com/show_bug.cgi?id=1184572, http://www.kb.cert.org/vuls/id/852879

    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