CVE-2016-2517

Published: Jan 30, 2017Modified: May 13, 2026

5.3

Vector

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

Exploitability: 1.6 / Impact: 3.6

Source: NVD

Description

NTP before 4.2.8p7 and 4.3.x before 4.3.92 allows remote attackers to cause a denial of service (prevent subsequent authentication) by leveraging knowledge of the controlkey or requestkey and sending a crafted packet to ntpd, which changes the value of trustedkey, controlkey, or requestkey. NOTE: this vulnerability exists because of a CVE-2016-2516 regression.

Affected (93)

Products: Ntp: Ntp

Ntp

1 product

Ntp

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Ntp Ntp	Up to 4.2.8

Configuration B

92 vulnerable

Vulnerable Software	Affected Versions
Ntp Ntp	Version 4.3.0
Ntp Ntp	Version 4.3.10
Ntp Ntp	Version 4.3.11
Ntp Ntp	Version 4.3.12
Ntp Ntp	Version 4.3.13
Ntp Ntp	Version 4.3.14
Ntp Ntp	Version 4.3.15
Ntp Ntp	Version 4.3.16
Ntp Ntp	Version 4.3.17
Ntp Ntp	Version 4.3.18
Ntp Ntp	Version 4.3.19
Ntp Ntp	Version 4.3.1
Ntp Ntp	Version 4.3.20
Ntp Ntp	Version 4.3.21
Ntp Ntp	Version 4.3.22
Ntp Ntp	Version 4.3.23
Ntp Ntp	Version 4.3.24
Ntp Ntp	Version 4.3.25
Ntp Ntp	Version 4.3.26
Ntp Ntp	Version 4.3.27
Ntp Ntp	Version 4.3.28
Ntp Ntp	Version 4.3.29
Ntp Ntp	Version 4.3.2
Ntp Ntp	Version 4.3.30
Ntp Ntp	Version 4.3.31
Ntp Ntp	Version 4.3.32
Ntp Ntp	Version 4.3.33
Ntp Ntp	Version 4.3.34
Ntp Ntp	Version 4.3.35
Ntp Ntp	Version 4.3.36
Ntp Ntp	Version 4.3.37
Ntp Ntp	Version 4.3.38
Ntp Ntp	Version 4.3.39
Ntp Ntp	Version 4.3.3
Ntp Ntp	Version 4.3.40
Ntp Ntp	Version 4.3.41
Ntp Ntp	Version 4.3.42
Ntp Ntp	Version 4.3.43
Ntp Ntp	Version 4.3.44
Ntp Ntp	Version 4.3.45
Ntp Ntp	Version 4.3.46
Ntp Ntp	Version 4.3.47
Ntp Ntp	Version 4.3.48
Ntp Ntp	Version 4.3.49
Ntp Ntp	Version 4.3.4
Ntp Ntp	Version 4.3.50
Ntp Ntp	Version 4.3.51
Ntp Ntp	Version 4.3.52
Ntp Ntp	Version 4.3.53
Ntp Ntp	Version 4.3.54
Ntp Ntp	Version 4.3.55
Ntp Ntp	Version 4.3.56
Ntp Ntp	Version 4.3.57
Ntp Ntp	Version 4.3.58
Ntp Ntp	Version 4.3.59
Ntp Ntp	Version 4.3.5
Ntp Ntp	Version 4.3.60
Ntp Ntp	Version 4.3.61
Ntp Ntp	Version 4.3.62
Ntp Ntp	Version 4.3.63
Ntp Ntp	Version 4.3.64
Ntp Ntp	Version 4.3.65
Ntp Ntp	Version 4.3.66
Ntp Ntp	Version 4.3.67
Ntp Ntp	Version 4.3.68
Ntp Ntp	Version 4.3.69
Ntp Ntp	Version 4.3.6
Ntp Ntp	Version 4.3.70
Ntp Ntp	Version 4.3.71
Ntp Ntp	Version 4.3.72
Ntp Ntp	Version 4.3.73
Ntp Ntp	Version 4.3.74
Ntp Ntp	Version 4.3.75
Ntp Ntp	Version 4.3.76
Ntp Ntp	Version 4.3.77
Ntp Ntp	Version 4.3.78
Ntp Ntp	Version 4.3.79
Ntp Ntp	Version 4.3.7
Ntp Ntp	Version 4.3.80
Ntp Ntp	Version 4.3.81
Ntp Ntp	Version 4.3.82
Ntp Ntp	Version 4.3.83
Ntp Ntp	Version 4.3.84
Ntp Ntp	Version 4.3.85
Ntp Ntp	Version 4.3.86
Ntp Ntp	Version 4.3.87
Ntp Ntp	Version 4.3.88
Ntp Ntp	Version 4.3.89
Ntp Ntp	Version 4.3.8
Ntp Ntp	Version 4.3.90
Ntp Ntp	Version 4.3.91
Ntp Ntp	Version 4.3.9