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7.5
CVSSv3

CVE-2016-4953

Published: 05/07/2016 Updated: 16/07/2021
CVSS v2 Base Score: 5 | Impact Score: 2.9 | Exploitability Score: 10
CVSS v3 Base Score: 7.5 | Impact Score: 3.6 | Exploitability Score: 3.9
VMScore: 445
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Vulnerability Summary

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

Vulnerability Trend

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ntp ntp 4.2.8

ntp ntp

oracle solaris 11.3

oracle solaris 10

suse linux enterprise server 11

suse openstack cloud 5

suse manager proxy 2.1

suse manager 2.1

suse linux enterprise server 12

suse linux enterprise desktop 12

opensuse leap 42.1

opensuse opensuse 13.2

siemens simatic net cp 443-1 opc ua firmware

siemens tim 4r-ie firmware

siemens tim 4r-ie dnp3 firmware

Vendor Advisories

Amazon Linux AMI: ALAS-2016-649
It was discovered that ntpd as a client did not correctly check the originate timestamp in received packets A remote attacker could use this flaw to send a crafted packet to an ntpd client that would effectively disable synchronization with the server, or push arbitrary offset/delay measurements to modify the time on the client (CVE-2015-8138) A ...
Red Hat: CVE-2016-4953
ntpd in NTP 4x before 428p8 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 ...

References

CWE-287http://www.kb.cert.org/vuls/id/321640http://support.ntp.org/bin/view/Main/NtpBug3045http://bugs.ntp.org/3045http://support.ntp.org/bin/view/Main/SecurityNoticehttp://lists.opensuse.org/opensuse-security-announce/2016-06/msg00023.htmlhttp://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.htmlhttp://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.htmlhttp://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.htmlhttp://lists.opensuse.org/opensuse-security-announce/2016-06/msg00040.htmlhttp://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.htmlhttp://www.securityfocus.com/bid/91010https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03757en_ushttps://security.gentoo.org/glsa/201607-15http://www.securitytracker.com/id/1036037https://security.FreeBSD.org/advisories/FreeBSD-SA-16:24.ntp.aschttps://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdfhttps://us-cert.cisa.gov/ics/advisories/icsa-21-103-11https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdfhttp://www.securityfocus.com/archive/1/archive/1/538600/100/0/threadedhttp://www.securityfocus.com/archive/1/archive/1/538599/100/0/threadedhttp://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.htmlhttp://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.htmlhttp://www.securityfocus.com/archive/1/archive/1/540683/100/0/threadedhttp://lists.opensuse.org/opensuse-security-announce/2016-06/msg00020.htmlhttp://www.securityfocus.com/archive/1/538599/100/0/threadedhttp://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160603-ntpdhttp://www.securityfocus.com/archive/1/538600/100/0/threadedhttps://us-cert.cisa.gov/ics/advisories/icsa-21-159-11http://www.securityfocus.com/archive/1/540683/100/0/threadedhttps://www.kb.cert.org/vuls/id/321640http://packetstormsecurity.com/files/137321/Slackware-Security-Advisory-ntp-Updates.htmlhttp://packetstormsecurity.com/files/137322/FreeBSD-Security-Advisory-FreeBSD-SA-16-24.ntp.htmlhttps://nvd.nist.govhttps://alas.aws.amazon.com/ALAS-2016-649.htmlhttps://www.kb.cert.org/vuls/id/321640
CVSSv3
CVSSv2
CVSSv3
VMScore
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