Medium severity · published Jan 6, 2017
CVE-2016-1547
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…
5.3
CVSS
5.1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)5.1% · higher than 92% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NT
Ntp · Ntp
through 4.2.8 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-1547
CVE.org
https://www.cve.org/CVERecord?id=CVE-2016-1547
rhn.redhat.com
http://rhn.redhat.com/errata/RHSA-2016-1552.html
www.debian.org
http://www.debian.org/security/2016/dsa-3629
www.oracle.com
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
www.oracle.com
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
www.securityfocus.com
http://www.securityfocus.com/bid/88276
www.securitytracker.com
http://www.securitytracker.com/id/1035705
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