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NTP.org ntpd is vulnerable to denial of service and other vulnerabilities

Vulnerability Note VU#321640

Original Release Date: 2016-06-02 | Last Revised: 2016-06-06

Overview

NTP.org's reference implementation of NTP server, ntpd, contains multiple vulnerabilities.

Description

NTP.org's reference implementation of NTP server, ntpd, contains multiple vulnerabilities. A brief overview follows, but details may be found in NTP's security advisory listing and in the individual links below.

CRYPTO-NAK denial of service introduced in Sec 3007 patch. See Sec 3046, CVE-2016-4957. The CVSS score below describes this vulnerability.

Bad authentication demobilizes ephemeral associations. See Sec 3045, CVE-2016-4953.

Processing of spoofed server packets affects peer variables. See Sec 3044, CVE-2016-4954.

Autokey associations may be reset when repeatedly receiving spoofed packets. See Sec 3043, CVE-2016-4955.

Broadcast associations are not covered in Sec 2978 patch, which may be leveraged to flip broadcast clients into interleave mode. See Sec 3042, CVE-2016-4956.

Impact

Unauthenticated, remote attackers may be able to spoof or send specially crafted packets to create denial of service conditions.

Solution

Apply an update

The vendor has released version 4.2.8p8 to address these issues. Users are encouraged to update to the latest release. Those unable to update should consider mitigations listed in NTP's security advisory listing.

Vendor Information

321640
Expand all

FreeBSD Project

Notified:  May 27, 2016 Updated:  June 06, 2016

Statement Date:   June 04, 2016

Status

  Affected

Vendor Statement

As of 2016-06-04 05:46:52 UTC, we published fix for all supported FreeBSD releases. We have published a security advisory for this at https://www.freebsd.org/security/advisories/FreeBSD-SA-16:24.ntp.asc .

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

Vendor References

https://www.freebsd.org/security/advisories/FreeBSD-SA-16:24.ntp.asc

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

NTP Project

Notified:  May 25, 2016 Updated:  June 02, 2016

Status

  Affected

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

ACCESS

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

AT&T

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Alcatel-Lucent

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Apple

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Arista Networks, Inc.

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Aruba Networks

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Avaya, Inc.

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Belkin, Inc.

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Blue Coat Systems

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

CA Technologies

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

CentOS

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Check Point Software Technologies

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Cisco

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

CoreOS

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

D-Link Systems, Inc.

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Debian GNU/Linux

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

DesktopBSD

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

DragonFly BSD Project

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

EMC Corporation

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

EfficientIP SAS

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Enterasys Networks

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Ericsson

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Extreme Networks

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

F5 Networks, Inc.

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Fedora Project

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Force10 Networks

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Gentoo Linux

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Google

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Hardened BSD

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Hewlett Packard Enterprise

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Hitachi

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Huawei Technologies

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

IBM Corporation

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Infoblox

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Intel Corporation

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Internet Systems Consortium

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Internet Systems Consortium - DHCP

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Juniper Networks

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Lenovo

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

McAfee

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Microsoft Corporation

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

NEC Corporation

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

NTPsec

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

NetBSD

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Nokia

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Nominum

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

OmniTI

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

OpenBSD

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

OpenDNS

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Openwall GNU/*/Linux

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Oracle Corporation

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Peplink

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Q1 Labs

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

QNX Software Systems Inc.

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Red Hat, Inc.

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

SUSE Linux

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

SafeNet

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Secure64 Software Corporation

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Slackware Linux Inc.

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

SmoothWall

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Snort

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Sony Corporation

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Sourcefire

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Symantec

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

TippingPoint Technologies Inc.

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Turbolinux

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Ubuntu

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Unisys

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

VMware

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Wind River

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

dnsmasq

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

m0n0wall

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

openSUSE project

Notified:  May 27, 2016 Updated:  May 27, 2016

Status

  Unknown

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Addendum

There are no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.


CVSS Metrics

Group Score Vector
Base 7.8 AV:N/AC:L/Au:N/C:N/I:N/A:C
Temporal 6.4 E:F/RL:OF/RC:C
Environmental 6.4 CDP:N/TD:H/CR:ND/IR:ND/AR:ND

References

Credit

The NTP Project credits Nicolas Edet of Cisco, Miroslav Lichvar of Red Hat, and Jakub Prokes of Red Hat for reporting these vulnerabilities.

This document was written by Joel Land.

Other Information

CVE IDs: CVE-2016-4953, CVE-2016-4954, CVE-2016-4955, CVE-2016-4956, CVE-2016-4957
Date Public: 2016-06-02
Date First Published: 2016-06-02
Date Last Updated: 2016-06-06 14:21 UTC
Document Revision: 8

Sponsored by the Department of Homeland Security Office of Cybersecurity and Communications.