CVE-2016-4955

medium
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

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

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

http://support.ntp.org/bin/view/Main/NtpBug3043

http://bugs.ntp.org/3043

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

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

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

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

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

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

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

http://www.securityfocus.com/bid/91007

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

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

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

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

Details

Source: MITRE

Published: 2016-07-05

Updated: 2021-07-16

Type: CWE-362

Risk Information

CVSS v2

Base Score: 4.3

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

Impact Score: 2.9

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3

Base Score: 5.9

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

Impact Score: 3.6

Exploitability Score: 2.2

Severity: MEDIUM

Vulnerable Software

Configuration 1

OR

cpe:2.3:a:ntp:ntp:*:*:*:*:*:*:*:*

cpe:2.3:a:ntp:ntp:4.2.8:-:*:*:*:*:*:*

cpe:2.3:a:ntp:ntp:4.2.8:p1:*:*:*:*:*:*

cpe:2.3:a:ntp:ntp:4.2.8:p1-beta1:*:*:*:*:*:*

cpe:2.3:a:ntp:ntp:4.2.8:p1-beta2:*:*:*:*:*:*

cpe:2.3:a:ntp:ntp:4.2.8:p1-beta3:*:*:*:*:*:*

cpe:2.3:a:ntp:ntp:4.2.8:p1-beta4:*:*:*:*:*:*

cpe:2.3:a:ntp:ntp:4.2.8:p1-beta5:*:*:*:*:*:*

cpe:2.3:a:ntp:ntp:4.2.8:p1-rc1:*:*:*:*:*:*

cpe:2.3:a:ntp:ntp:4.2.8:p1-rc2:*:*:*:*:*:*

cpe:2.3:a:ntp:ntp:4.2.8:p2:*:*:*:*:*:*

cpe:2.3:a:ntp:ntp:4.2.8:p5:*:*:*:*:*:*

cpe:2.3:a:ntp:ntp:4.2.8:p3:*:*:*:*:*:*

cpe:2.3:a:ntp:ntp:4.2.8:p4:*:*:*:*:*:*

cpe:2.3:a:ntp:ntp:4.2.8:p7:*:*:*:*:*:*

cpe:2.3:a:ntp:ntp:4.2.8:p6:*:*:*:*:*:*

cpe:2.3:a:ntp:ntp:4.2.8:p3-rc3:*:*:*:*:*:*

cpe:2.3:a:ntp:ntp:4.2.8:p3-rc2:*:*:*:*:*:*

cpe:2.3:a:ntp:ntp:4.2.8:p3-rc1:*:*:*:*:*:*

cpe:2.3:a:ntp:ntp:4.2.8:p2-rc3:*:*:*:*:*:*

cpe:2.3:a:ntp:ntp:4.2.8:p2-rc2:*:*:*:*:*:*

cpe:2.3:a:ntp:ntp:4.2.8:p2-rc1:*:*:*:*:*:*

cpe:2.3:a:ntp:ntp:*:*:*:*:*:*:*:*

Configuration 2

OR

cpe:2.3:o:oracle:solaris:10:*:*:*:*:*:*:*

cpe:2.3:o:oracle:solaris:11.3:*:*:*:*:*:*:*

Configuration 3

OR

cpe:2.3:a:suse:manager_proxy:2.1:*:*:*:*:*:*:*

cpe:2.3:a:suse:openstack_cloud:5:*:*:*:*:*:*:*

cpe:2.3:o:novell:suse_manager:2.1:*:*:*:*:*:*:*

cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*

cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*

cpe:2.3:o:suse:linux_enterprise_desktop:12:sp1:*:*:*:*:*:*

cpe:2.3:o:suse:linux_enterprise_server:11:sp2:*:*:ltss:*:*:*

cpe:2.3:o:suse:linux_enterprise_server:11:sp3:*:*:ltss:*:*:*

cpe:2.3:o:suse:linux_enterprise_server:11:sp4:*:*:*:*:*:*

cpe:2.3:o:suse:linux_enterprise_server:12:sp1:*:*:*:*:*:*

Configuration 4

AND

OR

cpe:2.3:o:siemens:simatic_net_cp_443-1_opc_ua_firmware:*:*:*:*:*:*:*:*

OR

cpe:2.3:h:siemens:simatic_net_cp_443-1_opc_ua:-:*:*:*:*:*:*:*

Tenable Plugins

View all (26 total)

IDNameProductFamilySeverity
125009EulerOS Virtualization 3.0.1.0 : ntp (EulerOS-SA-2019-1556)NessusHuawei Local Security Checks
critical
101311EulerOS 2.0 SP2 : ntp (EulerOS-SA-2017-1125)NessusHuawei Local Security Checks
medium
101310EulerOS 2.0 SP1 : ntp (EulerOS-SA-2017-1124)NessusHuawei Local Security Checks
medium
99183AIX NTP v4 Advisory : ntp_advisory7.asc (IV87278) (IV87279)NessusAIX Local Security Checks
high
95959F5 Networks BIG-IP : NTP vulnerability (K03331206)NessusF5 Networks Local Security Checks
medium
93896Ubuntu 12.04 LTS / 14.04 LTS / 16.04 LTS : ntp vulnerabilities (USN-3096-1)NessusUbuntu Local Security Checks
high
93352AIX 7.2 TL 0 : ntp (IV87939) (deprecated)NessusAIX Local Security Checks
high
93351AIX 7.1 TL 3 : ntp (IV87615) (deprecated)NessusAIX Local Security Checks
high
93350AIX 5.3 TL 12 : ntp (IV87614) (deprecated)NessusAIX Local Security Checks
high
93349AIX 7.1 TL 4 : ntp (IV87420) (deprecated)NessusAIX Local Security Checks
high
93348AIX 6.1 TL 9 : ntp (IV87419) (deprecated)NessusAIX Local Security Checks
high
93186SUSE SLES10 Security Update : ntp (SUSE-SU-2016:1912-1)NessusSuSE Local Security Checks
critical
93153SUSE SLES11 Security Update : ntp (SUSE-SU-2016:1602-1)NessusSuSE Local Security Checks
high
92927FreeBSD : FreeBSD -- Multiple ntp vulnerabilities (7cfcea05-600a-11e6-a6c3-14dae9d210b8)NessusFreeBSD Local Security Checks
high
92662Amazon Linux AMI : ntp (ALAS-2016-727)NessusAmazon Linux Local Security Checks
high
92485GLSA-201607-15 : NTP: Multiple vulnerabilitiesNessusGentoo Local Security Checks
critical
92288Fedora 22 : ntp (2016-c3bd6a3496)NessusFedora Local Security Checks
medium
92265Fedora 23 : ntp (2016-89e0874533)NessusFedora Local Security Checks
medium
92095Fedora 24 : ntp (2016-50b0066b7f)NessusFedora Local Security Checks
medium
91721openSUSE Security Update : ntp (openSUSE-2016-750)NessusSuSE Local Security Checks
high
91666SUSE SLES11 Security Update : ntp (SUSE-SU-2016:1584-1)NessusSuSE Local Security Checks
high
91663SUSE SLED12 / SLES12 Security Update : ntp (SUSE-SU-2016:1568-1)NessusSuSE Local Security Checks
critical
91662SUSE SLED12 / SLES12 Security Update : ntp (SUSE-SU-2016:1563-1)NessusSuSE Local Security Checks
high
91630openSUSE Security Update : ntp (openSUSE-2016-727)NessusSuSE Local Security Checks
high
91515Network Time Protocol Daemon (ntpd) 4.x < 4.2.8p8 / 4.3.x < 4.3.93 Multiple VulnerabilitiesNessusMisc.
high
91462Slackware 13.0 / 13.1 / 13.37 / 14.0 / 14.1 / current : ntp (SSA:2016-155-01)NessusSlackware Local Security Checks
high