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K
f5F5F5:K82570157
HistoryMar 19, 2018 - 12:00 a.m.

K82570157 : NTP vulnerability CVE-2018-7170

2018-03-1900:00:00
my.f5.com
17

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

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

7.2 High

AI Score

Confidence

Low

4 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

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

0.001 Low

EPSS

Percentile

50.4%

Security Advisory Description

ntpd in ntp 4.2.x before 4.2.8p7 and 4.3.x before 4.3.92 allows authenticated users that know the private symmetric key to create arbitrarily-many ephemeral associations in order to win the clock selection of ntpd and modify a victim’s clock via a Sybil attack. This issue exists because of an incomplete fix for CVE-2016-1549. (CVE-2018-7170)

Impact

An attacker can make adjustments to the system time of the F5 product, disrupting time-sensitive functionality of the F5 product. Only F5 products configured to use symmetric key authentication when synchronizing time with an NTP server are vulnerable.

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

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

7.2 High

AI Score

Confidence

Low

4 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

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

0.001 Low

EPSS

Percentile

50.4%