UBUNTU-CVE-2018-7184

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    UBUNTU-CVE-2018-7184

    Published: 6 Mar 2018Last Modified: 4 Feb 2026
    Upstream:
    CVE-2018-7184
    Aliases:
    USN-3707-1

    Summary:

    Details: ntpd in ntp 4.2.8p4 before 4.2.8p11 drops bad packets before updating the "received" timestamp, which allows remote attackers to cause a denial of service (disruption) by sending a packet with a zero-origin timestamp causing the association to reset and setting the contents of the packet as the most recent timestamp. This issue is a result of an incomplete fix for CVE-2015-7704.

    References: https://ubuntu.com/security/CVE-2018-7184, http://www.kb.cert.org/vuls/id/961909, http://support.ntp.org/bin/view/Main/SecurityNotice#February_2018_ntp_4_2_8p11_NTP_S, https://ubuntu.com/security/notices/USN-3707-1, https://www.cve.org/CVERecord?id=CVE-2018-7184

    Affected packages

    Package

    Name: ntp

    Purl: pkg:deb/ubuntu/ntp@1:4.2.8p10+dfsg-5ubuntu7.1?arch=source&distro=bionic

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1:4.2.8p10+dfsg-5ubuntu7.1

    Affected versions

    1:4.2.8p10+dfsg-5ubuntu3
    1:4.2.8p10+dfsg-5ubuntu4
    1:4.2.8p10+dfsg-5ubuntu5
    1:4.2.8p10+dfsg-5ubuntu6
    1:4.2.8p10+dfsg-5ubuntu7

    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