CVE-2016-1547

5.3 MEDIUM
Published: January 06, 2017 Modified: May 06, 2026
View on NVD

Description

An off-path attacker can cause a preemptible client association to be demobilized in NTP 4.2.8p4 and earlier and NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 by sending a crypto NAK packet to a victim client with a spoofed source address of an existing associated peer. This is true even if authentication is enabled.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-1552.html
Source: cret@cert.org
http://www.debian.org/security/2016/dsa-3629
Source: cret@cert.org
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
Source: cret@cert.org
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
Source: cret@cert.org
http://www.securityfocus.com/bid/88276
Source: cret@cert.org
http://www.securitytracker.com/id/1035705
Source: cret@cert.org
http://www.talosintelligence.com/reports/TALOS-2016-0081/
Source: cret@cert.org
Mitigation Technical Description Third Party Advisory
https://access.redhat.com/errata/RHSA-2016:1141
Source: cret@cert.org
https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf
Source: cret@cert.org
https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf
Source: cret@cert.org
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc
Source: cret@cert.org
https://security.gentoo.org/glsa/201607-15
Source: cret@cert.org
https://security.netapp.com/advisory/ntap-20171004-0002/
Source: cret@cert.org
https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11
Source: cret@cert.org
https://www.arista.com/en/support/advisories-notices/security-advisories/1332-security-advisory-19
Source: cret@cert.org
http://rhn.redhat.com/errata/RHSA-2016-1552.html
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.debian.org/security/2016/dsa-3629
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.securityfocus.com/bid/88276
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.securitytracker.com/id/1035705
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.talosintelligence.com/reports/TALOS-2016-0081/
Source: af854a3a-2127-422b-91ae-364da2661108
Mitigation Technical Description Third Party Advisory
https://access.redhat.com/errata/RHSA-2016:1141
Source: af854a3a-2127-422b-91ae-364da2661108
https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf
Source: af854a3a-2127-422b-91ae-364da2661108
https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf
Source: af854a3a-2127-422b-91ae-364da2661108
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc
Source: af854a3a-2127-422b-91ae-364da2661108
https://security.gentoo.org/glsa/201607-15
Source: af854a3a-2127-422b-91ae-364da2661108
https://security.netapp.com/advisory/ntap-20171004-0002/
Source: af854a3a-2127-422b-91ae-364da2661108
https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11
Source: af854a3a-2127-422b-91ae-364da2661108
https://www.arista.com/en/support/advisories-notices/security-advisories/1332-security-advisory-19
Source: af854a3a-2127-422b-91ae-364da2661108

30 reference(s) from NVD

Quick Stats

CVSS v3 Score
5.3 / 10.0
EPSS (Exploit Probability)
3.7%
88th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-20

Affected Vendors

ntp

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