CVE-2016-4953

high

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.

References

Advisories
More

https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11

https://security.gentoo.org/glsa/201607-15

https://security.FreeBSD.org/advisories/FreeBSD-SA-16:24.ntp.asc

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

https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf

https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf

http://www.securitytracker.com/id/1036037

http://www.securityfocus.com/bid/91010

http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html

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

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00040.html

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.html

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.html

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00023.html

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.html

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

https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11

http://www.securityfocus.com/archive/1/archive/1/540683/100/0/threaded

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://www.securityfocus.com/archive/1/540683/100/0/threaded

http://www.securityfocus.com/archive/1/538600/100/0/threaded

http://www.securityfocus.com/archive/1/538599/100/0/threaded

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160603-ntpd

http://support.ntp.org/bin/view/Main/SecurityNotice

http://support.ntp.org/bin/view/Main/NtpBug3045

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

http://packetstormsecurity.com/files/137321/Slackware-Security-Advisory-ntp-Updates.html

http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html

http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html

http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00020.html

http://bugs.ntp.org/3045

Details

Source: Mitre, NVD

Published: 2016-07-05

Updated: 2025-04-12

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Severity: Medium

CVSS v3

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity: High

EPSS

EPSS: 0.19204

Detections

Analytics