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    CVE-2016-7426

    NTP before 4.2.8p9 rate limits responses received from the configured sources when rate limiting for all associations is enabled, which allows remote attackers to cause a denial of service (prevent responses from the sources) by sending responses with a spoofed source address.

    Published:Nov 21, 2016
    Last Modified:Apr 20, 2025
    EPS:Jan 13, 2017
    EPSS Score:0.38912
    CVSS Score:7.5

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Hpe
    Product
    Hpux-ntp
    Vendor
    Ntp
    Product
    Ntp
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Enterprise Linux Desktop
    Vendor
    Redhat
    Product
    Enterprise Linux Server
    Vendor
    Redhat
    Product
    Enterprise Linux Server Aus
    Vendor
    Redhat
    Product
    Enterprise Linux Server Eus
    Vendor
    Redhat
    Product
    Enterprise Linux Server Tus
    Vendor
    Redhat
    Product
    Enterprise Linux Workstation

    Exploits

    No exploit reference

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    References

    http://nwtime.org/ntp428p9_release/
    http://rhn.redhat.com/errata/RHSA-2017-0252.html
    http://support.ntp.org/bin/view/Main/NtpBug3071
    http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities
    http://www.securityfocus.com/bid/94451
    http://www.securitytracker.com/id/1037354
    https://bto.bluecoat.com/security-advisory/sa139
    https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03706en_us
    https://security.FreeBSD.org/advisories/FreeBSD-SA-16:39.ntp.asc
    https://usn.ubuntu.com/3707-2/
    https://www.kb.cert.org/vuls/id/633847
    http://nwtime.org/ntp428p9_release/
    http://rhn.redhat.com/errata/RHSA-2017-0252.html
    http://support.ntp.org/bin/view/Main/NtpBug3071
    http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities
    http://www.securityfocus.com/bid/94451
    http://www.securitytracker.com/id/1037354
    https://bto.bluecoat.com/security-advisory/sa139
    https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03706en_us
    https://security.FreeBSD.org/advisories/FreeBSD-SA-16:39.ntp.asc
    https://usn.ubuntu.com/3707-2/
    https://www.kb.cert.org/vuls/id/633847

    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