CVE-2016-4957

HIGH

NTP - Denial of Service via Crypto-NAK Packet

Title source: llm
STIX 2.1

Description

ntpd in NTP before 4.2.8p8 allows remote attackers to cause a denial of service (daemon crash) via a crypto-NAK packet. NOTE: this vulnerability exists because of an incorrect fix for CVE-2016-1547.

References (13)

Core 13
Core References
Mailing List, Third Party Advisory vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.html
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
Issue Tracking, Vendor Advisory x_refsource_confirm
http://bugs.ntp.org/3046
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
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
Patch, Vendor Advisory x_refsource_confirm
http://support.ntp.org/bin/view/Main/NtpBug3046
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

Scores

CVSS v3 7.5
EPSS 0.5907
EPSS Percentile 98.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-476
Status published
Products (12)
novell/suse_manager 2.1
ntp/ntp 4.2.8 p7
ntp/ntp 4.3.92
opensuse/leap 42.1
opensuse/opensuse 13.2
oracle/solaris 10
oracle/solaris 11.3
suse/linux_enterprise_desktop 12 sp1
suse/linux_enterprise_server 11 sp2 (3 CPE variants)
suse/linux_enterprise_server 12 sp1
... and 2 more
Published Jul 05, 2016
Tracked Since Feb 18, 2026