NVD - CVE-2016-4953

CVE-2016-4953 Detail

Modified

This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.

Description

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.

Source: MITRE
Description Last Modified: 07/04/2016

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 4.0 MEDIUM
Vector: AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L (V3 legend)
Impact Score: 1.4
Exploitability Score: 2.2

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): None
Integrity (I): None
Availability (A): Low

CVSS v2.0 Severity and Metrics:

Base Score: 4.3 MEDIUM
Vector: (AV:N/AC:M/Au:N/C:N/I:N/A:P) (V2 legend)
Impact Subscore: 2.9
Exploitability Subscore: 8.6

Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (AU): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Partial
Additional Information:
Allows disruption of service

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
http://bugs.ntp.org/3045
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.html
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00023.html
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.html
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.html
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00040.html
http://support.ntp.org/bin/view/Main/NtpBug3045	Patch Vendor Advisory
http://support.ntp.org/bin/view/Main/SecurityNotice	Vendor Advisory
http://www.kb.cert.org/vuls/id/321640	Third Party Advisory US Government Resource
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
http://www.securityfocus.com/bid/91010
http://www.securitytracker.com/id/1036037
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03757en_us
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:24.ntp.asc
https://security.gentoo.org/glsa/201607-15

Technical Details

Vulnerability Type (View All)

Race Conditions (CWE-362)

Vulnerable software and versions Switch to CPE 2.2

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Change History

9 change records found - show changes

CVE Modified by Source - 7/13/2016 10:02:41 PM

Action	Type	New Value
Added	Reference	http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.html
Added	Reference	http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00023.html
Added	Reference	http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.html
Added	Reference	http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.html
Added	Reference	http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00040.html

Modified Analysis - 7/6/2016 8:07:31 PM

Action	Type	Old Value	New Value
Added	CPE Configuration		Record truncated, showing 500 of 36953 characters. View Entire Change Record Configuration 1 OR cpe:2.3:a:ntp:ntp:4.2.8:p7::::::* cpe:2.3:a:ntp:ntp:4.2.8:p6::::::* cpe:2.3:a:ntp:ntp:4.2.8:p5::::::* cpe:2.3:a:ntp:ntp:4.2.8:p4::::::* cpe:2.3:a:ntp:ntp:4.2.8:p3_rc3::::::* cpe:2.3:a:ntp:ntp:4.2.8:p3_rc2::::::* cpe:2.3:a:ntp:ntp:4.2.8:p3_rc1::::::* cpe:2.3:a:ntp:ntp:4.2.8:p3::::::* cpe:2.3:a:ntp:ntp:4.2.8:p2_rc3::::::*
Added	CVSS V2		(AV:N/AC:M/Au:N/C:N/I:N/A:P)
Added	CVSS V3		AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L
Added	CWE		CWE-362
Changed	Reference Type	http://support.ntp.org/bin/view/Main/NtpBug3045 No Types Assigned	http://support.ntp.org/bin/view/Main/NtpBug3045 Advisory, Patch
Changed	Reference Type	http://support.ntp.org/bin/view/Main/SecurityNotice No Types Assigned	http://support.ntp.org/bin/view/Main/SecurityNotice Advisory
Changed	Reference Type	http://www.kb.cert.org/vuls/id/321640 US Govt Resource	http://www.kb.cert.org/vuls/id/321640 Advisory, US Govt Resource

Quick Info

CVE Dictionary Entry:
CVE-2016-4953
NVD Published Date:
07/04/2016
NVD Last Modified:
11/20/2017

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Information Technology Laboratory

National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2016-4953 Detail

Description

Impact

References to Advisories, Solutions, and Tools

Technical Details

Vulnerable software and versions Switch to CPE 2.2

Change History

CVE Modified by MITRE - 11/20/2017 9:29:04 PM

CVE Modified by MITRE - 8/31/2017 9:29:26 PM

CVE Modified by MITRE - 6/30/2017 9:29:48 PM

CVE Modified by MITRE - 6/8/2017 9:29:01 PM

CVE Modified by MITRE - 11/28/2016 3:21:59 PM

CVE Modified by Source - 10/3/2016 10:08:28 PM

CVE Modified by Source - 7/13/2016 10:02:41 PM

Modified Analysis - 7/6/2016 8:07:31 PM

Initial CVE Analysis - 7/5/2016 2:26:09 PM

Quick Info