CVE-2016-7427

MEDIUM

NTP - Denial of Service via Broadcast Mode Replay Prevention Bypass

Title source: llm
STIX 2.1

Description

The broadcast mode replay prevention functionality in ntpd in NTP before 4.2.8p9 allows remote attackers to cause a denial of service (reject broadcast mode packets) via a crafted broadcast mode packet.

References (12)

Core 12
Core References
Various Sources vendor-advisory x_refsource_freebsd
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:39.ntp.asc
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/94447
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3707-2/
Release Notes, Vendor Advisory x_refsource_confirm
http://nwtime.org/ntp428p9_release/
Issue Tracking, Mitigation, Vendor Advisory x_refsource_confirm
http://support.ntp.org/bin/view/Main/NtpBug3114
Third Party Advisory, US Government Resource third-party-advisory x_refsource_cert-vn
https://www.kb.cert.org/vuls/id/633847
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1037354
Various Sources x_refsource_confirm
https://bto.bluecoat.com/security-advisory/sa139

Scores

CVSS v3 4.3
EPSS 0.0391
EPSS Percentile 89.0%
Attack Vector ADJACENT_NETWORK
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Details

CWE
CWE-400
Status published
Products (1)
ntp/ntp 4.2.8 p6 (3 CPE variants)
Published Jan 13, 2017
Tracked Since Feb 18, 2026