CVE-2018-7170

moderate-risk

Published 2018-03-06

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.

Do I need to act?

0.54% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 5.3/10 Medium

NETWORK / HIGH complexity

Affected Products (20)

Ntp

Affected Vendors

Hpe Ntp Netapp Synology

References (20)

Third Party Advisory http://packetstormsecurity.com/files/146631/Slackware-Security-Advisory-ntp-Upda...

Third Party Advisory http://support.ntp.org/bin/view/Main/NtpBug3415

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

Third Party Advisory http://www.securityfocus.com/bid/103194

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

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

Third Party Advisory https://security.gentoo.org/glsa/201805-12

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

Third Party Advisory https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpe...

Third Party Advisory https://www.synology.com/support/security/Synology_SA_18_13