CVE-2016-4955

CVSS V2 Medium 4.3 CVSS V3 Medium 5.9

Description

ntpd in NTP 4.x before 4.2.8p8, when autokey is enabled, allows remote attackers to cause a denial of service (peer-variable clearing and association outage) by sending (1) a spoofed crypto-NAK packet or (2) a packet with an incorrect MAC value at a certain time.

Overview

CVE ID
CVE-2016-4955

Assigner
cve@mitre.org

Vulnerability Status
Modified

Published Version
2016-07-05T01:59:02

Last Modified Date
2021-07-16T12:15:08

Weakness Enumerations

CWE	URL
CWE-362	http://cwe.mitre.org/data/definitions/362.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version Start	Version End
		AND
cpe:2.3:a:ntp:ntp::::::::	1	OR	4.2.0	4.2.8
cpe:2.3:a:ntp:ntp::::::::	1	OR	4.3.0	4.3.93
cpe:2.3:a:ntp:ntp:4.2.8:-::::::	1	OR
cpe:2.3:a:ntp:ntp:4.2.8:p1::::::	1	OR
cpe:2.3:a:ntp:ntp:4.2.8:p1-beta1::::::	1	OR
cpe:2.3:a:ntp:ntp:4.2.8:p1-beta2::::::	1	OR
cpe:2.3:a:ntp:ntp:4.2.8:p1-beta3::::::	1	OR
cpe:2.3:a:ntp:ntp:4.2.8:p1-beta4::::::	1	OR
cpe:2.3:a:ntp:ntp:4.2.8:p1-beta5::::::	1	OR
cpe:2.3:a:ntp:ntp:4.2.8:p1-rc1::::::	1	OR
cpe:2.3:a:ntp:ntp:4.2.8:p1-rc2::::::	1	OR
cpe:2.3:a:ntp:ntp:4.2.8:p2::::::	1	OR
cpe:2.3:a:ntp:ntp:4.2.8:p2-rc1::::::	1	OR
cpe:2.3:a:ntp:ntp:4.2.8:p2-rc2::::::	1	OR
cpe:2.3:a:ntp:ntp:4.2.8:p2-rc3::::::	1	OR
cpe:2.3:a:ntp:ntp:4.2.8:p3::::::	1	OR
cpe:2.3:a:ntp:ntp:4.2.8:p3-rc1::::::	1	OR
cpe:2.3:a:ntp:ntp:4.2.8:p3-rc2::::::	1	OR
cpe:2.3:a:ntp:ntp:4.2.8:p3-rc3::::::	1	OR
cpe:2.3:a:ntp:ntp:4.2.8:p4::::::	1	OR
cpe:2.3:a:ntp:ntp:4.2.8:p5::::::	1	OR
cpe:2.3:a:ntp:ntp:4.2.8:p6::::::	1	OR
cpe:2.3:a:ntp:ntp:4.2.8:p7::::::	1	OR
		AND
cpe:2.3:o:oracle:solaris:10:::::::*	1	OR
cpe:2.3:o:oracle:solaris:11.3:::::::*	1	OR
		AND
cpe:2.3:a:suse:manager_proxy:2.1:::::::*	1	OR
cpe:2.3:a:suse:openstack_cloud:5:::::::*	1	OR
cpe:2.3:o:novell:suse_manager:2.1:::::::*	1	OR
cpe:2.3:o:opensuse:leap:42.1:::::::*	1	OR
cpe:2.3:o:opensuse:opensuse:13.2:::::::*	1	OR
cpe:2.3:o:suse:linux_enterprise_desktop:12:sp1::::::	1	OR
cpe:2.3:o:suse:linux_enterprise_server:11:sp2:::ltss:::*	1	OR
cpe:2.3:o:suse:linux_enterprise_server:11:sp3:::ltss:::*	1	OR
cpe:2.3:o:suse:linux_enterprise_server:11:sp4::::::	1	OR
cpe:2.3:o:suse:linux_enterprise_server:12:sp1::::::	1	OR
		AND
cpe:2.3:o:siemens:simatic_net_cp_443-1_opc_ua_firmware::::::::	1	OR
cpe:2.3:h:siemens:simatic_net_cp_443-1_opc_ua:-:::::::*	0	OR

CVSS Version 2

Version
2.0

Vector String
AV:N/AC:M/Au:N/C:N/I:N/A:P

Access Vector
NETWORK

Access Compatibility
MEDIUM

Authentication
NONE

Confidentiality Impact
NONE

Integrity Impact
NONE

Availability Impact
PARTIAL

Base Score
4.3

Severity
MEDIUM

Exploitability Score
8.6

Impact Score
2.9

CVSS Version 3

Version
3.1

Vector String
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK

Attack Compatibility
HIGH

Privileges Required
NONE

User Interaction
NONE

Scope
UNCHANGED

Confidentiality Impact
NONE

Availability Impact
HIGH

Base Score
5.9

Base Severity
MEDIUM

Exploitability Score
2.2

Impact Score
3.6

References

Reference URL	Reference Tags
http://www.kb.cert.org/vuls/id/321640	Third Party Advisory US Government Resource
http://support.ntp.org/bin/view/Main/NtpBug3043	Patch Vendor Advisory
http://bugs.ntp.org/3043	Issue Tracking Vendor Advisory
http://support.ntp.org/bin/view/Main/SecurityNotice	Release Notes Vendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00023.html	Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.html	Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.html	Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.html	Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00040.html	Mailing List Third Party Advisory
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html	Third Party Advisory
http://www.securityfocus.com/bid/91007	Third Party Advisory VDB Entry
https://security.gentoo.org/glsa/201607-15	Third Party Advisory
http://www.securitytracker.com/id/1036037	Third Party Advisory VDB Entry
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:24.ntp.asc	Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf	Third Party Advisory
http://www.securityfocus.com/archive/1/archive/1/538600/100/0/threaded
http://www.securityfocus.com/archive/1/archive/1/538599/100/0/threaded
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html
http://www.ubuntu.com/usn/USN-3096-1
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00020.html
http://www.securityfocus.com/archive/1/538599/100/0/threaded
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160603-ntpd
http://www.securityfocus.com/archive/1/538600/100/0/threaded
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WNWGCQLW2VY72NIUYMJOCAKJKTXHDUK2/
https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11
https://www.kb.cert.org/vuls/id/321640
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/K3EYJQHJZ2KTVQ7ICEFHXTLZ36MRASWX/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ORAMN3Q7TVJ54MBYF75XCJOE3DP7LYHT/
http://packetstormsecurity.com/files/137321/Slackware-Security-Advisory-ntp-Updates.html
http://packetstormsecurity.com/files/137322/FreeBSD-Security-Advisory-FreeBSD-SA-16-24.ntp.html

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2016-4955
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4955

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 07:06:45				Added to TrackCVE
2022-12-02 10:11:33	2016-07-05T01:59Z	2016-07-05T01:59:02	CVE Published Date	updated
2022-12-02 10:11:33		2021-07-16T12:15:08	CVE Modified Date	updated
2022-12-02 10:11:33		Modified	Vulnerability Status	updated