CVE-2016-4953 : ntpd in NTP 4.x before 4.2.8p8 allows remote attackers to cause a denial of serv

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.

Published 2016-07-05 01:59:00

Updated 2021-07-16 13:15:08

Source MITRE

View at NVD, CVE.org

Vulnerability category: BypassGain privilegeDenial of service

Products affected by CVE-2016-4953

Suse » Linux Enterprise Desktop » Version: 12 Update SP1
cpe:2.3:o:suse:linux_enterprise_desktop:12:sp1:*:*:*:*:*:*
Matching versions
Suse » Linux Enterprise Server » Version: 11 Update SP2 Ltss Edition
cpe:2.3:o:suse:linux_enterprise_server:11:sp2:*:*:ltss:*:*:*
Matching versions
Suse » Linux Enterprise Server » Version: 12 Update SP1
cpe:2.3:o:suse:linux_enterprise_server:12:sp1:*:*:*:*:*:*
Matching versions
Suse » Linux Enterprise Server » Version: 11 Update SP4
cpe:2.3:o:suse:linux_enterprise_server:11:sp4:*:*:*:*:*:*
Matching versions
Suse » Linux Enterprise Server » Version: 11 Update SP3 Ltss Edition
cpe:2.3:o:suse:linux_enterprise_server:11:sp3:*:*:ltss:*:*:*
Matching versions
Suse » Manager » Version: 2.1
cpe:2.3:a:suse:manager:2.1:*:*:*:*:*:*:*
Matching versions
Suse » Openstack Cloud » Version: 5
cpe:2.3:a:suse:openstack_cloud:5:*:*:*:*:*:*:*
Matching versions
Suse » Manager Proxy » Version: 2.1
cpe:2.3:a:suse:manager_proxy:2.1:*:*:*:*:*:*:*
Matching versions
Oracle » Solaris » Version: 10
cpe:2.3:o:oracle:solaris:10:*:*:*:*:*:*:*
Matching versions
Oracle » Solaris » Version: 11.3
cpe:2.3:o:oracle:solaris:11.3:*:*:*:*:*:*:*
Matching versions
Siemens » Tim 4r-ie Firmware
cpe:2.3:o:siemens:tim_4r-ie_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Tim 4r-ie » Version: N/A
Siemens » Tim 4r-ie Dnp3 Firmware
cpe:2.3:o:siemens:tim_4r-ie_dnp3_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Tim 4r-ie Dnp3 » Version: N/A
Siemens » Simatic Net Cp 443-1 Opc Ua Firmware
cpe:2.3:o:siemens:simatic_net_cp_443-1_opc_ua_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Siemens » Simatic Net Cp 443-1 Opc Ua » Version: N/A
NTP » NTP
Versions from including (>=) 4.2.0 and before (<) 4.2.8
cpe:2.3:a:ntp:ntp:*:*:*:*:*:*:*:*
Matching versions
NTP » NTP
Versions from including (>=) 4.3.0 and before (<) 4.3.93
cpe:2.3:a:ntp:ntp:*:*:*:*:*:*:*:*
Matching versions
NTP » NTP » Version: 4.2.8
cpe:2.3:a:ntp:ntp:4.2.8:-:*:*:*:*:*:*
Matching versions
NTP » NTP » Version: 4.2.8 Update P2-rc1
cpe:2.3:a:ntp:ntp:4.2.8:p2-rc1:*:*:*:*:*:*
Matching versions
NTP » NTP » Version: 4.2.8 Update P1
cpe:2.3:a:ntp:ntp:4.2.8:p1:*:*:*:*:*:*
Matching versions
NTP » NTP » Version: 4.2.8 Update P2
cpe:2.3:a:ntp:ntp:4.2.8:p2:*:*:*:*:*:*
Matching versions
NTP » NTP » Version: 4.2.8 Update P1-beta1
cpe:2.3:a:ntp:ntp:4.2.8:p1-beta1:*:*:*:*:*:*
Matching versions
NTP » NTP » Version: 4.2.8 Update P1-beta2
cpe:2.3:a:ntp:ntp:4.2.8:p1-beta2:*:*:*:*:*:*
Matching versions
NTP » NTP » Version: 4.2.8 Update P1-beta3
cpe:2.3:a:ntp:ntp:4.2.8:p1-beta3:*:*:*:*:*:*
Matching versions
NTP » NTP » Version: 4.2.8 Update P1-beta4
cpe:2.3:a:ntp:ntp:4.2.8:p1-beta4:*:*:*:*:*:*
Matching versions
NTP » NTP » Version: 4.2.8 Update P1-beta5
cpe:2.3:a:ntp:ntp:4.2.8:p1-beta5:*:*:*:*:*:*
Matching versions
NTP » NTP » Version: 4.2.8 Update P1-rc1
cpe:2.3:a:ntp:ntp:4.2.8:p1-rc1:*:*:*:*:*:*
Matching versions
NTP » NTP » Version: 4.2.8 Update P1-rc2
cpe:2.3:a:ntp:ntp:4.2.8:p1-rc2:*:*:*:*:*:*
Matching versions
NTP » NTP » Version: 4.2.8 Update P2-rc2
cpe:2.3:a:ntp:ntp:4.2.8:p2-rc2:*:*:*:*:*:*
Matching versions
NTP » NTP » Version: 4.2.8 Update P2-rc3
cpe:2.3:a:ntp:ntp:4.2.8:p2-rc3:*:*:*:*:*:*
Matching versions
NTP » NTP » Version: 4.2.8 Update P3
cpe:2.3:a:ntp:ntp:4.2.8:p3:*:*:*:*:*:*
Matching versions
NTP » NTP » Version: 4.2.8 Update P3-rc1
cpe:2.3:a:ntp:ntp:4.2.8:p3-rc1:*:*:*:*:*:*
Matching versions
NTP » NTP » Version: 4.2.8 Update P3-rc2
cpe:2.3:a:ntp:ntp:4.2.8:p3-rc2:*:*:*:*:*:*
Matching versions
NTP » NTP » Version: 4.2.8 Update P3-rc3
cpe:2.3:a:ntp:ntp:4.2.8:p3-rc3:*:*:*:*:*:*
Matching versions
NTP » NTP » Version: 4.2.8 Update P4
cpe:2.3:a:ntp:ntp:4.2.8:p4:*:*:*:*:*:*
Matching versions
NTP » NTP » Version: 4.2.8 Update P5
cpe:2.3:a:ntp:ntp:4.2.8:p5:*:*:*:*:*:*
Matching versions
NTP » NTP » Version: 4.2.8 Update P6
cpe:2.3:a:ntp:ntp:4.2.8:p6:*:*:*:*:*:*
Matching versions
NTP » NTP » Version: 4.2.8 Update P7
cpe:2.3:a:ntp:ntp:4.2.8:p7:*:*:*:*:*:*
Matching versions
Opensuse » Opensuse » Version: 13.2
cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*
Matching versions
Opensuse » Leap » Version: 42.1
cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2016-4953

EPSS FAQ

15.76%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 96 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2016-4953

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:N/A:P	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	3.9	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2016-4953

CWE-287 Improper Authentication

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2016-4953

http://www.kb.cert.org/vuls/id/321640

VU#321640 - NTP.org ntpd is vulnerable to denial of service and other vulnerabilities
Third Party Advisory;US Government Resource

CVEs referencing this url
http://bugs.ntp.org/3045

Issue Tracking;Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf

Third Party Advisory

CVEs referencing this url
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160603-ntpd

Multiple Vulnerabilities in Network Time Protocol Daemon Affecting Cisco Products: June 2016

CVEs referencing this url
http://www.securityfocus.com/archive/1/archive/1/540683/100/0/threaded

CVEs referencing this url
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00023.html

[security-announce] openSUSE-SU-2016:1583-1: important: Security update
Mailing List;Third Party Advisory

CVEs referencing this url
http://www.securityfocus.com/archive/1/archive/1/538599/100/0/threaded

CVEs referencing this url
http://packetstormsecurity.com/files/137322/FreeBSD-Security-Advisory-FreeBSD-SA-16-24.ntp.html

FreeBSD Security Advisory - FreeBSD-SA-16:24.ntp ≈ Packet Storm

CVEs referencing this url
http://support.ntp.org/bin/view/Main/SecurityNotice

SecurityNotice < Main < NTP
Vendor Advisory

CVEs referencing this url
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03757en_us

HPESBHF03757 rev.1 - HPE Network Products including Comware 5 and Comware 7 running NTP, Remote Denial of Service (DoS)
Third Party Advisory

CVEs referencing this url
https://security.gentoo.org/glsa/201607-15

NTP: Multiple vulnerabilities (GLSA 201607-15) — Gentoo security
Third Party Advisory

CVEs referencing this url
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:24.ntp.asc

Third Party Advisory

CVEs referencing this url
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html

Oracle Solaris Bulletin - April 2016
Third Party Advisory

CVEs referencing this url
http://www.securityfocus.com/archive/1/538599/100/0/threaded

CVEs referencing this url
https://www.kb.cert.org/vuls/id/321640

VU#321640 - NTP.org ntpd is vulnerable to denial of service and other vulnerabilities

CVEs referencing this url
http://www.securityfocus.com/archive/1/540683/100/0/threaded

CVEs referencing this url
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00020.html

[security-announce] SUSE-SU-2016:1568-1: important: Security update for ntp - openSUSE Security Announce - openSUSE Mailing Lists

CVEs referencing this url
https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11

Siemens TIM 4R-IE Devices | CISA
Third Party Advisory;US Government Resource

CVEs referencing this url
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html

[security-announce] SUSE-SU-2016:1912-1: important: Security update for

CVEs referencing this url
http://www.securityfocus.com/bid/91010

NTP CVE-2016-4953 Denial of Service Vulnerability
Third Party Advisory;VDB Entry
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html

[security-announce] SUSE-SU-2016:2094-1: important: Security update for

CVEs referencing this url
https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf

Third Party Advisory

CVEs referencing this url
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.html

[security-announce] SUSE-SU-2016:1584-1: important: Security update for
Mailing List;Third Party Advisory

CVEs referencing this url
http://packetstormsecurity.com/files/137321/Slackware-Security-Advisory-ntp-Updates.html

Slackware Security Advisory - ntp Updates ≈ Packet Storm

CVEs referencing this url
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.html

[security-announce] SUSE-SU-2016:1563-1: important: Security update for
Mailing List;Third Party Advisory

CVEs referencing this url
http://support.ntp.org/bin/view/Main/NtpBug3045

NtpBug3045 < Main < NTP
Patch;Vendor Advisory
http://www.securityfocus.com/archive/1/538600/100/0/threaded

CVEs referencing this url
http://www.securitytracker.com/id/1036037

ntp Multiple Bugs Let Remote Users Modify Parameters and Deny Service - SecurityTracker
Third Party Advisory;VDB Entry

CVEs referencing this url
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00040.html

[security-announce] openSUSE-SU-2016:1636-1: important: Security update
Mailing List;Third Party Advisory

CVEs referencing this url
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.html

[security-announce] SUSE-SU-2016:1602-1: important: Security update for
Mailing List;Third Party Advisory

CVEs referencing this url
https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11

Siemens SIMATIC NET CP 443-1 OPC UA | CISA

CVEs referencing this url
http://www.securityfocus.com/archive/1/archive/1/538600/100/0/threaded

CVEs referencing this url

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Vulnerability Details : CVE-2016-4953

Products affected by CVE-2016-4953

Exploit prediction scoring system (EPSS) score for CVE-2016-4953

CVSS scores for CVE-2016-4953

CWE ids for CVE-2016-4953

References for CVE-2016-4953