CVE-2016-4953

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

ntpd in NTP 4.x before 4.2.8p8 allows remote attackers to cause a denial of service (ephemeral-association demobilization) by sending a spoofed crypto-NAK packet with incorrect authentication data at a certain time.

ntpd en NTP 4.x en versiones anteriores a 4.2.8p8 permite a atacantes remotos provocar una denegación de servicio (desmovilización de asociación efímera) mediante el envío de un paquete crypto-NAK falsificado con datos de autenticación incorrectos en un momento determinado.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-05-23 CVE Reserved
2016-06-06 CVE Published
2024-08-06 CVE Updated
2024-09-02 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-287: Improper Authentication

CAPEC

References (32)

URL	Tag	Source
http://packetstormsecurity.com/files/137321/Slackware-Security-Advisory-ntp-Updates.html	X_refsource_misc
http://packetstormsecurity.com/files/137322/FreeBSD-Security-Advisory-FreeBSD-SA-16-24.ntp.html	X_refsource_misc
http://www.kb.cert.org/vuls/id/321640	Third Party Advisory
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html	Third Party Advisory
http://www.securityfocus.com/archive/1/538599/100/0/threaded	Mailing List
http://www.securityfocus.com/archive/1/538600/100/0/threaded	Mailing List
http://www.securityfocus.com/archive/1/540683/100/0/threaded	Mailing List
http://www.securityfocus.com/archive/1/archive/1/538599/100/0/threaded	Mailing List
http://www.securityfocus.com/archive/1/archive/1/538600/100/0/threaded	Mailing List
http://www.securityfocus.com/archive/1/archive/1/540683/100/0/threaded	Mailing List
http://www.securityfocus.com/bid/91010	Third Party Advisory
http://www.securitytracker.com/id/1036037	Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf	Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf	Third Party Advisory
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03757en_us	Third Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11	Third Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11	X_refsource_misc
https://www.kb.cert.org/vuls/id/321640	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
http://support.ntp.org/bin/view/Main/NtpBug3045	2021-07-16

URL	Date	SRC
http://bugs.ntp.org/3045	2021-07-16
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.html	2021-07-16
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00020.html	2021-07-16
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00023.html	2021-07-16
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.html	2021-07-16
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.html	2021-07-16
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00040.html	2021-07-16
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html	2021-07-16
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html	2021-07-16
http://support.ntp.org/bin/view/Main/SecurityNotice	2021-07-16
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160603-ntpd	2021-07-16
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:24.ntp.asc	2021-07-16
https://security.gentoo.org/glsa/201607-15	2021-07-16

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Siemens Search vendor "Siemens"	Simatic Net Cp 443-1 Opc Ua Firmware Search vendor "Siemens" for product "Simatic Net Cp 443-1 Opc Ua Firmware"	*	-	Affected	in	Siemens Search vendor "Siemens"	Simatic Net Cp 443-1 Opc Ua Search vendor "Siemens" for product "Simatic Net Cp 443-1 Opc Ua"	-	-	Safe
Siemens Search vendor "Siemens"	Tim 4r-ie Firmware Search vendor "Siemens" for product "Tim 4r-ie Firmware"	*	-	Affected	in	Siemens Search vendor "Siemens"	Tim 4r-ie Search vendor "Siemens" for product "Tim 4r-ie"	-	-	Safe
Siemens Search vendor "Siemens"	Tim 4r-ie Dnp3 Firmware Search vendor "Siemens" for product "Tim 4r-ie Dnp3 Firmware"	*	-	Affected	in	Siemens Search vendor "Siemens"	Tim 4r-ie Dnp3 Search vendor "Siemens" for product "Tim 4r-ie Dnp3"	-	-	Safe
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				>= 4.2.0 < 4.2.8 Search vendor "Ntp" for product "Ntp" and version " >= 4.2.0 < 4.2.8"		-		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				>= 4.3.0 < 4.3.93 Search vendor "Ntp" for product "Ntp" and version " >= 4.3.0 < 4.3.93"		-		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		-		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p1		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p1-beta1		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p1-beta2		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p1-beta3		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p1-beta4		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p1-beta5		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p1-rc1		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p1-rc2		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p2		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p2-rc1		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p2-rc2		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p2-rc3		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p3		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p3-rc1		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p3-rc2		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p3-rc3		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p4		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p5		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p6		Affected
Ntp Search vendor "Ntp"		Ntp Search vendor "Ntp" for product "Ntp"				4.2.8 Search vendor "Ntp" for product "Ntp" and version "4.2.8"		p7		Affected
Oracle Search vendor "Oracle"		Solaris Search vendor "Oracle" for product "Solaris"				10 Search vendor "Oracle" for product "Solaris" and version "10"		-		Affected
Oracle Search vendor "Oracle"		Solaris Search vendor "Oracle" for product "Solaris"				11.3 Search vendor "Oracle" for product "Solaris" and version "11.3"		-		Affected
Suse Search vendor "Suse"		Manager Search vendor "Suse" for product "Manager"				2.1 Search vendor "Suse" for product "Manager" and version "2.1"		-		Affected
Suse Search vendor "Suse"		Manager Proxy Search vendor "Suse" for product "Manager Proxy"				2.1 Search vendor "Suse" for product "Manager Proxy" and version "2.1"		-		Affected
Suse Search vendor "Suse"		Openstack Cloud Search vendor "Suse" for product "Openstack Cloud"				5 Search vendor "Suse" for product "Openstack Cloud" and version "5"		-		Affected
Opensuse Search vendor "Opensuse"		Leap Search vendor "Opensuse" for product "Leap"				42.1 Search vendor "Opensuse" for product "Leap" and version "42.1"		-		Affected
Opensuse Search vendor "Opensuse"		Opensuse Search vendor "Opensuse" for product "Opensuse"				13.2 Search vendor "Opensuse" for product "Opensuse" and version "13.2"		-		Affected
Suse Search vendor "Suse"		Linux Enterprise Desktop Search vendor "Suse" for product "Linux Enterprise Desktop"				12 Search vendor "Suse" for product "Linux Enterprise Desktop" and version "12"		sp1		Affected
Suse Search vendor "Suse"		Linux Enterprise Server Search vendor "Suse" for product "Linux Enterprise Server"				11 Search vendor "Suse" for product "Linux Enterprise Server" and version "11"		sp2, ltss		Affected
Suse Search vendor "Suse"		Linux Enterprise Server Search vendor "Suse" for product "Linux Enterprise Server"				11 Search vendor "Suse" for product "Linux Enterprise Server" and version "11"		sp3, ltss		Affected
Suse Search vendor "Suse"		Linux Enterprise Server Search vendor "Suse" for product "Linux Enterprise Server"				11 Search vendor "Suse" for product "Linux Enterprise Server" and version "11"		sp4		Affected
Suse Search vendor "Suse"		Linux Enterprise Server Search vendor "Suse" for product "Linux Enterprise Server"				12 Search vendor "Suse" for product "Linux Enterprise Server" and version "12"		sp1		Affected