CVE-2016-7433

2017-01-1300:00:00

ubuntu.com

5.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

LOW

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

0.024 Low

EPSS

Percentile

89.8%

JSON

NTP before 4.2.8p9 does not properly perform the initial sync calculations,
which allows remote attackers to unspecified impact via unknown vectors,
related to a “root distance that did not include the peer dispersion.”

Bugs

Notes

Author	Note
mdeslaur	ntp-4.2.7p385, up to but not including ntp-4.2.8p9, and ntp-4.3.0 up to, but not including ntp-4.3.94. But the root-distance calculation in general is incorrect in all versions of ntp-4 until this release.
leosilva	for precise it’s not needed since this issue seems to be caused by some regression and precise hasn’t the code affect changed.
mdeslaur	trusty isn’t vulnerable either

OSVersionArchitecturePackageVersionFilename
ubuntu16.04noarchntp< 1:4.2.8p4+dfsg-3ubuntu5.5UNKNOWN
ubuntu16.10noarchntp< 1:4.2.8p8+dfsg-1ubuntu2.1UNKNOWN