UBUNTU-CVE-2015-1798

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    UBUNTU-CVE-2015-1798

    Published: 8 Apr 2015Last Modified: 4 Feb 2026
    Upstream:
    CVE-2015-1798
    Aliases:
    USN-2567-1

    Summary:

    Details: The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 4.x before 4.2.8p2 requires a correct MAC only if the MAC field has a nonzero length, which makes it easier for man-in-the-middle attackers to spoof packets by omitting the MAC.

    References: https://ubuntu.com/security/CVE-2015-1798, http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities, https://ubuntu.com/security/notices/USN-2567-1, https://www.cve.org/CVERecord?id=CVE-2015-1798

    Affected packages

    Package

    Name: ntp

    Purl: pkg:deb/ubuntu/ntp@1:4.2.6.p5+dfsg-3ubuntu2.14.04.3?arch=source&distro=trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1:4.2.6.p5+dfsg-3ubuntu2.14.04.3

    Affected versions

    1:4.2.6.p5+dfsg-3ubuntu2
    1:4.2.6.p5+dfsg-3ubuntu2.14.04.1
    1:4.2.6.p5+dfsg-3ubuntu2.14.04.2

    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