UBUNTU-CVE-2015-7853

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    UBUNTU-CVE-2015-7853

    Published: 22 Oct 2015Last Modified: 4 Feb 2026
    Upstream:
    CVE-2015-7853
    Aliases:
    USN-2783-1

    Summary:

    Details: The datalen parameter in the refclock driver in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to execute arbitrary code or cause a denial of service (crash) via a negative input value.

    References: https://ubuntu.com/security/CVE-2015-7853, http://support.ntp.org/bin/view/Main/SecurityNotice#October_2015_NTP_Security_Vulner, http://blog.talosintel.com/2015/10/ntpd-vulnerabilities.html, http://talosintel.com/reports/TALOS-2015-0064/, https://ubuntu.com/security/notices/USN-2783-1, https://www.cve.org/CVERecord?id=CVE-2015-7853

    Affected packages

    Package

    Name: ntp

    Purl: pkg:deb/ubuntu/ntp@1:4.2.6.p5+dfsg-3ubuntu2.14.04.5?arch=source&distro=trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1:4.2.6.p5+dfsg-3ubuntu2.14.04.5

    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
    1:4.2.6.p5+dfsg-3ubuntu2.14.04.3

    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