CVE-2018-7170

LOW

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.

References

http://packetstormsecurity.com/files/146631/Slackware-Security-Advisory-ntp-Updates.html

http://support.ntp.org/bin/view/Main/NtpBug3415

http://www.securityfocus.com/archive/1/541824/100/0/threaded

http://www.securityfocus.com/bid/103194

https://bugzilla.redhat.com/show_bug.cgi?id=1550214

https://security.FreeBSD.org/advisories/FreeBSD-SA-18:02.ntp.asc

https://security.gentoo.org/glsa/201805-12

https://security.netapp.com/advisory/ntap-20180626-0001/

https://www.synology.com/support/security/Synology_SA_18_13

Details

Source: MITRE

Published: 2018-03-06

Updated: 2019-10-03

Risk Information

CVSS v2.0

Base Score: 3.5

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

Impact Score: 2.9

Exploitability Score: 6.8

Severity: LOW

CVSS v3.0

Base Score: 5.3

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

Impact Score: 3.6

Exploitability Score: 1.6

Severity: MEDIUM