CVE-2016-4955

2016-07-0400:00:00

ubuntu.com

5.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:N/I:N/A:P

0.021 Low

EPSS

Percentile

89.1%

JSON

ntpd in NTP 4.x before 4.2.8p8, when autokey is enabled, allows remote
attackers to cause a denial of service (peer-variable clearing and
association outage) by sending (1) a spoofed crypto-NAK packet or (2) a
packet with an incorrect MAC value at a certain time.

Bugs

<http://support.ntp.org/bin/view/Main/NtpBug3043>

OSVersionArchitecturePackageVersionFilename
ubuntu12.04noarchntp< 1:4.2.6.p3+dfsg-1ubuntu3.11UNKNOWN
ubuntu14.04noarchntp< 1:4.2.6.p5+dfsg-3ubuntu2.14.04.10UNKNOWN
ubuntu16.04noarchntp< 1:4.2.8p4+dfsg-3ubuntu5.3UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	12.04	noarch	ntp	< 1:4.2.6.p3+dfsg-1ubuntu3.11	UNKNOWN
ubuntu	14.04	noarch	ntp	< 1:4.2.6.p5+dfsg-3ubuntu2.14.04.10	UNKNOWN
ubuntu	16.04	noarch	ntp	< 1:4.2.8p4+dfsg-3ubuntu5.3	UNKNOWN