USN-4563-2

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    USN-4563-2

    Published: 20 Apr 2021Last Modified: 10 Feb 2026

    Summary: ntp vulnerability

    Details: USN-4563-1 fixed a vulnerability in NTP. This update provides the corresponding update for Ubuntu 20.04 LTS and Ubuntu 20.10. Original advisory details: It was discovered that the fix for CVE-2018-7182 introduced a NULL pointer dereference into NTP. An attacker could use this vulnerability to cause a denial of service (crash).

    References: https://ubuntu.com/security/notices/USN-4563-2, https://ubuntu.com/security/CVE-2019-8936

    Affected packages

    Package

    Name: ntp

    Purl: pkg:deb/ubuntu/ntp@1:4.2.8p12+dfsg-3ubuntu4.20.04.1?arch=source&distro=focal

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1:4.2.8p12+dfsg-3ubuntu4.20.04.1

    Affected versions

    1:4.2.8p12+dfsg-3ubuntu2
    1:4.2.8p12+dfsg-3ubuntu3
    1:4.2.8p12+dfsg-3ubuntu4

    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
    USN-4563-2 | CVE-DB