The remote Ubuntu 14.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-2783-1 advisory.

    Aleksis Kauppinen discovered that NTP incorrectly handled certain remote config packets. In a non-default     configuration, a remote authenticated attacker could possibly use this issue to cause NTP to crash,     resulting in a denial of service. (CVE-2015-5146)

    Miroslav Lichvar discovered that NTP incorrectly handled logconfig directives. In a non-default     configuration, a remote authenticated attacker could possibly use this issue to cause NTP to crash,     resulting in a denial of service. (CVE-2015-5194)

    Miroslav Lichvar discovered that NTP incorrectly handled certain statistics types. In a non-default     configuration, a remote authenticated attacker could possibly use this issue to cause NTP to crash,     resulting in a denial of service. (CVE-2015-5195)

    Miroslav Lichvar discovered that NTP incorrectly handled certain file paths. In a non-default     configuration, a remote authenticated attacker could possibly use this issue to cause NTP to crash,     resulting in a denial of service, or overwrite certain files. (CVE-2015-5196, CVE-2015-7703)

    Miroslav Lichvar discovered that NTP incorrectly handled certain packets. A remote attacker could possibly     use this issue to cause NTP to hang, resulting in a denial of service. (CVE-2015-5219)

    Aanchal Malhotra, Isaac E. Cohen, and Sharon Goldberg discovered that NTP incorrectly handled restarting     after hitting a panic threshold. A remote attacker could possibly use this issue to alter the system time     on clients. (CVE-2015-5300)

    It was discovered that NTP incorrectly handled autokey data packets. A remote attacker could possibly use     this issue to cause NTP to crash, resulting in a denial of service, or possibly execute arbitrary code.
    (CVE-2015-7691, CVE-2015-7692, CVE-2015-7702)

    It was discovered that NTP incorrectly handled memory when processing certain autokey messages. A remote     attacker could possibly use this issue to cause NTP to consume memory, resulting in a denial of service.
    (CVE-2015-7701)

    Aanchal Malhotra, Isaac E. Cohen, and Sharon Goldberg discovered that NTP incorrectly handled rate     limiting. A remote attacker could possibly use this issue to cause clients to stop updating their clock.
    (CVE-2015-7704, CVE-2015-7705)

    Yves Younan discovered that NTP incorrectly handled logfile and keyfile directives. In a non-default     configuration, a remote authenticated attacker could possibly use this issue to cause NTP to enter a loop,     resulting in a denial of service. (CVE-2015-7850)

    Yves Younan and Aleksander Nikolich discovered that NTP incorrectly handled ascii conversion. A remote     attacker could possibly use this issue to cause NTP to crash, resulting in a denial of service, or     possibly execute arbitrary code. (CVE-2015-7852)

    Yves Younan discovered that NTP incorrectly handled reference clock memory. A malicious refclock could     possibly use this issue to cause NTP to crash, resulting in a denial of service, or possibly execute     arbitrary code. (CVE-2015-7853)

    John D Doug Birdwell discovered that NTP incorrectly handled decoding certain bogus values. An attacker     could possibly use this issue to cause NTP to crash, resulting in a denial of service. (CVE-2015-7855)

    Stephen Gray discovered that NTP incorrectly handled symmetric association authentication. A remote     attacker could use this issue to possibly bypass authentication and alter the system clock.
    (CVE-2015-7871)

    In the default installation, attackers would be isolated by the NTP AppArmor profile.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

Analytics

Ubuntu 14.04 LTS : NTP vulnerabilities (USN-2783-1)

critical Nessus Plugin ID 86630

Version 2.23

Version 2.21

Version 2.23 Aug 29, 2025, 3:06 PM CVE (set "CVE" coverage to "CVE-2015-5146,CVE-2015-5194,CVE-2015-5195,CVE-2015-5219,CVE-2015-5300,CVE-2015-7691,CVE-2015-7692,CVE-2015-7701,CVE-2015-7702,CVE-2015-7703,CVE-2015-7704,CVE-2015-7705,CVE-2015-7850,CVE-2015-7852,CVE-2015-7853,CVE-2015-7855,CVE-2015-7871") CVSS metrics ("Cvssv4 score" set to 0.0) CVSSv2 severity (based on None, severity decreased from "High" to "Low") Detection (updated detection logic) Plugin Feed: 202508291506
Version 2.21 Oct 21, 2023, 3:09 AM CVSSv2 score source (set to "CVE-2015-7871") Detection Plugin metadata Plugin Feed: 202310210309