CVE-2016-2517

MEDIUM

NTP < 4.2.8p7 and 4.3.x < 4.3.92 - Denial of Service via Trusted Key Manipulation

Title source: llm
STIX 2.1

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.

References (8)

Core 8
Core References
Vendor Advisory x_refsource_confirm
http://support.ntp.org/bin/view/Main/NtpBug3010
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/88189
Third Party Advisory, US Government Resource third-party-advisory x_refsource_cert-vn
https://www.kb.cert.org/vuls/id/718152
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1035705
Various Sources vendor-advisory x_refsource_freebsd
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc
Third Party Advisory vendor-advisory x_refsource_gentoo
https://security.gentoo.org/glsa/201607-15
Vendor Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20171004-0002/

Scores

CVSS v3 5.3
EPSS 0.0882
EPSS Percentile 94.6%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-20
Status published
Products (50)
ntp/ntp 4.3.0
ntp/ntp 4.3.1
ntp/ntp 4.3.2
ntp/ntp 4.3.3
ntp/ntp 4.3.4
ntp/ntp 4.3.5
ntp/ntp 4.3.6
ntp/ntp 4.3.7
ntp/ntp 4.3.8
ntp/ntp 4.3.9
... and 40 more
Published Jan 30, 2017
Tracked Since Feb 18, 2026