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CVE-2016-1547

CVE-2016-1547

This page contains facts from public vulnerability sources. Check the original advisory before updating.

An off-path attacker can cause a preemptible client association to be demobilized in NTP 4.2.8p4 and earlier and NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 by sending a crypto NAK packet to a victim client with a spoofed source address of an existing associated peer. This is true even if authentication is enabled.

CVSS 5.3 · Medium · EPSS 5.1% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • ntp

    Versions
    • 4.2.8p3: Affected
    • 4.2.8p4: Affected

    No fix published

  • ntpsec

    Versions
    • a5fb34b9cc89b92a8fef2f459004865c93bb7f92: Affected

    No fix published

  • ntp Debian:11

    Affected ranges
    • ECOSYSTEM: < 1:4.2.8p7+dfsg-1

    Update to 1:4.2.8p7+dfsg-1

  • ntp Ubuntu:14.04:LTS

    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
    • 1:4.2.6.p5+dfsg-3ubuntu2.14.04.5
    • 1:4.2.6.p5+dfsg-3ubuntu2.14.04.6
    • 1:4.2.6.p5+dfsg-3ubuntu2.14.04.7
    • 1:4.2.6.p5+dfsg-3ubuntu2.14.04.8
    Affected ranges
    • ECOSYSTEM: < 1:4.2.6.p5+dfsg-3ubuntu2.14.04.10

    Update to 1:4.2.6.p5+dfsg-3ubuntu2.14.04.10

  • ntp Ubuntu:16.04:LTS

    Versions
    • 1:4.2.6.p5+dfsg-3ubuntu8
    • 1:4.2.6.p5+dfsg-3ubuntu8.1
    • 1:4.2.6.p5+dfsg-3ubuntu9
    • 1:4.2.8p4+dfsg-3ubuntu1
    • 1:4.2.8p4+dfsg-3ubuntu2
    • 1:4.2.8p4+dfsg-3ubuntu3
    • 1:4.2.8p4+dfsg-3ubuntu4
    • 1:4.2.8p4+dfsg-3ubuntu5
    • 1:4.2.8p4+dfsg-3ubuntu5.1
    • 1:4.2.8p4+dfsg-3ubuntu5.2
    Affected ranges
    • ECOSYSTEM: < 1:4.2.8p4+dfsg-3ubuntu5.3

    Update to 1:4.2.8p4+dfsg-3ubuntu5.3

Original sources

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