CVE-2017-6464

Severity: medium (CVSS 6.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 5.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-03-27 · updated 2026-06-17
Weakness: CWE-20

Description

NTP before 4.2.8p10 and 4.3.x before 4.3.94 allows remote attackers to cause a denial of service (ntpd crash) via a malformed mode configuration directive.

Affected products

NTP: 4.2.8-p9, 4.3.0, 4.3.1, 4.3.2, 4.3.3, 4.3.4 (+89)

References

http://support.ntp.org/bin/view/Main/NtpBug3389
http://support.ntp.org/bin/view/Main/SecurityNotice#March_2017_ntp_4_2_8p10_NTP_Secu
http://www.securityfocus.com/bid/97050
http://www.securitytracker.com/id/1038123
https://access.redhat.com/errata/RHSA-2017:3071
https://access.redhat.com/errata/RHSA-2018:0855
https://security.FreeBSD.org/advisories/FreeBSD-SA-17:03.ntp.asc
https://support.apple.com/HT208144
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03962en_us
http://support.ntp.org/bin/view/Main/NtpBug3389
http://support.ntp.org/bin/view/Main/SecurityNotice#March_2017_ntp_4_2_8p10_NTP_Secu
http://www.securityfocus.com/bid/97050

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