CVE-2016-7426

HIGH

NTP 4.2.6-4.2.8 - Denial of Service via Spoofed Response Rate Limiting

Title source: llm
STIX 2.1

Description

NTP before 4.2.8p9 rate limits responses received from the configured sources when rate limiting for all associations is enabled, which allows remote attackers to cause a denial of service (prevent responses from the sources) by sending responses with a spoofed source address.

References (11)

Core 11
Core References
Third Party Advisory vendor-advisory x_refsource_redhat
http://rhn.redhat.com/errata/RHSA-2017-0252.html
Release Notes, Vendor Advisory x_refsource_confirm
http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities
Third Party Advisory x_refsource_confirm
http://nwtime.org/ntp428p9_release/
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1037354
Third Party Advisory x_refsource_confirm
https://bto.bluecoat.com/security-advisory/sa139
Issue Tracking, Mitigation, Vendor Advisory x_refsource_confirm
http://support.ntp.org/bin/view/Main/NtpBug3071
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/94451
Third Party Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3707-2/
Third Party Advisory, US Government Resource third-party-advisory x_refsource_cert-vn
https://www.kb.cert.org/vuls/id/633847
Third Party Advisory vendor-advisory x_refsource_freebsd
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:39.ntp.asc

Scores

CVSS v3 7.5
EPSS 0.1168
EPSS Percentile 93.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-400
Status published
Products (3)
canonical/ubuntu_linux 12.04
hpe/hpux-ntp b.11.31 - c.4.2.8.2.0
ntp/ntp 4.2.5 p203 (48 CPE variants)
Published Jan 13, 2017
Tracked Since Feb 18, 2026