CVE-2016-4955

MEDIUM

NTP 4.x < 4.2.8p8 - Denial of Service via Spoofed Crypto-NAK or Incorrect MAC Packet

Title source: llm
STIX 2.1

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.

References (31)

Core 31
Core References
Mailing List, Third Party Advisory vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.html
Vendor Advisory vendor-advisory x_refsource_ubuntu
http://www.ubuntu.com/usn/USN-3096-1
Mailing List, Third Party Advisory vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00023.html
Third Party Advisory vendor-advisory x_refsource_freebsd
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:24.ntp.asc
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/91007
Patch, Vendor Advisory x_refsource_confirm
http://support.ntp.org/bin/view/Main/NtpBug3043
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1036037
Mailing List, Third Party Advisory vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.html
Issue Tracking, Vendor Advisory x_refsource_confirm
http://bugs.ntp.org/3043
Third Party Advisory, US Government Resource third-party-advisory x_refsource_cert-vn
http://www.kb.cert.org/vuls/id/321640
Release Notes, Vendor Advisory x_refsource_confirm
http://support.ntp.org/bin/view/Main/SecurityNotice
Mailing List, Third Party Advisory vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00040.html
Mailing List, Third Party Advisory vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.html
Third Party Advisory vendor-advisory x_refsource_gentoo
https://security.gentoo.org/glsa/201607-15
Third Party Advisory, VDB Entry mailing-list x_refsource_bugtraq
http://www.securityfocus.com/archive/1/538599/100/0/threaded
Third Party Advisory, VDB Entry mailing-list x_refsource_bugtraq
http://www.securityfocus.com/archive/1/538600/100/0/threaded
Third Party Advisory, US Government Resource third-party-advisory x_refsource_cert-vn
https://www.kb.cert.org/vuls/id/321640
Third Party Advisory, VDB Entry mailing-list x_refsource_bugtraq
http://www.securityfocus.com/archive/1/archive/1/538599/100/0/threaded
Third Party Advisory, VDB Entry mailing-list x_refsource_bugtraq
http://www.securityfocus.com/archive/1/archive/1/538600/100/0/threaded
Third Party Advisory x_refsource_confirm
https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf
Third Party Advisory, US Government Resource x_refsource_misc
https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11

Scores

CVSS v3 5.9
EPSS 0.0173
EPSS Percentile 82.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-362
Status published
Products (13)
novell/suse_manager 2.1
ntp/ntp 4.2.8 (21 CPE variants)
ntp/ntp 4.2.0 - 4.2.8
opensuse/leap 42.1
opensuse/opensuse 13.2
oracle/solaris 10
oracle/solaris 11.3
siemens/simatic_net_cp_443-1_opc_ua_firmware
suse/linux_enterprise_desktop 12 sp1
suse/linux_enterprise_server 11 sp2 (3 CPE variants)
... and 3 more
Published Jul 05, 2016
Tracked Since Feb 18, 2026