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CVE-2016-4955

Medium
Low Medium High Critical
5.9
CVSS Score
Published: Jul 05, 2016
Last Modified: Apr 12, 2025

Vulnerability 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.

CVSS Metrics

Common Vulnerability Scoring System

Vector String:

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
N
Attack Complexity
H
Privileges Required
N
User Interaction
N
Scope
U
Confidentiality
N
Integrity
N
Availability
H

Known Affected Software

110 configuration(s) from 5 vendor(s)

suse_manager
Version:
2.1
CPE:
cpe:2.3:o:novell:suse_manager:2.1:*:*:*:*:*:*:*
ntp
Version:
4.3.78
CPE:
cpe:2.3:a:ntp:ntp:4.3.78:*:*:*:*:*:*:*
ntp
Version:
4.3.75
CPE:
cpe:2.3:a:ntp:ntp:4.3.75:*:*:*:*:*:*:*
ntp
Version:
4.3.70
CPE:
cpe:2.3:a:ntp:ntp:4.3.70:*:*:*:*:*:*:*
ntp
Version:
4.3.6
CPE:
cpe:2.3:a:ntp:ntp:4.3.6:*:*:*:*:*:*:*
ntp
Version:
4.3.44
CPE:
cpe:2.3:a:ntp:ntp:4.3.44:*:*:*:*:*:*:*
ntp
Version:
4.2.8
CPE:
cpe:2.3:a:ntp:ntp:4.2.8:p15:*:*:*:*:*:*
ntp
Version:
4.3.26
CPE:
cpe:2.3:a:ntp:ntp:4.3.26:*:*:*:*:*:*:*
ntp
Version:
4.3.60
CPE:
cpe:2.3:a:ntp:ntp:4.3.60:*:*:*:*:*:*:*
ntp
Version:
4.3.92
CPE:
cpe:2.3:a:ntp:ntp:4.3.92:*:*:*:*:*:*:*
ntp
Version:
4.3.47
CPE:
cpe:2.3:a:ntp:ntp:4.3.47:*:*:*:*:*:*:*
ntp
Version:
4.3.35
CPE:
cpe:2.3:a:ntp:ntp:4.3.35:*:*:*:*:*:*:*
ntp
Version:
4.3.37
CPE:
cpe:2.3:a:ntp:ntp:4.3.37:*:*:*:*:*:*:*
ntp
Version:
4.2.6
CPE:
cpe:2.3:a:ntp:ntp:4.2.6:p2:*:*:*:*:*:*
ntp
Version:
4.3.58
CPE:
cpe:2.3:a:ntp:ntp:4.3.58:*:*:*:*:*:*:*
ntp
Version:
4.3.90
CPE:
cpe:2.3:a:ntp:ntp:4.3.90:*:*:*:*:*:*:*
ntp
Version:
4.3.32
CPE:
cpe:2.3:a:ntp:ntp:4.3.32:*:*:*:*:*:*:*
ntp
Version:
4.3.22
CPE:
cpe:2.3:a:ntp:ntp:4.3.22:*:*:*:*:*:*:*
ntp
Version:
4.3.88
CPE:
cpe:2.3:a:ntp:ntp:4.3.88:*:*:*:*:*:*:*
ntp
Version:
4.3.15
CPE:
cpe:2.3:a:ntp:ntp:4.3.15:*:*:*:*:*:*:*
ntp
Version:
4.3.76
CPE:
cpe:2.3:a:ntp:ntp:4.3.76:*:*:*:*:*:*:*
ntp
Version:
4.3.77
CPE:
cpe:2.3:a:ntp:ntp:4.3.77:*:*:*:*:*:*:*
ntp
Version:
4.3.62
CPE:
cpe:2.3:a:ntp:ntp:4.3.62:*:*:*:*:*:*:*
ntp
Version:
4.3.38
CPE:
cpe:2.3:a:ntp:ntp:4.3.38:*:*:*:*:*:*:*
ntp
Version:
4.3.57
CPE:
cpe:2.3:a:ntp:ntp:4.3.57:*:*:*:*:*:*:*
ntp
Version:
4.3.7
CPE:
cpe:2.3:a:ntp:ntp:4.3.7:*:*:*:*:*:*:*
ntp
Version:
4.2.5
CPE:
cpe:2.3:a:ntp:ntp:4.2.5:p241_rc1:*:*:*:*:*:*
ntp
Version:
4.3.40
CPE:
cpe:2.3:a:ntp:ntp:4.3.40:*:*:*:*:*:*:*
ntp
Version:
4.3.73
CPE:
cpe:2.3:a:ntp:ntp:4.3.73:*:*:*:*:*:*:*
ntp
Version:
4.3.46
CPE:
cpe:2.3:a:ntp:ntp:4.3.46:*:*:*:*:*:*:*
ntp
Version:
4.3.61
CPE:
cpe:2.3:a:ntp:ntp:4.3.61:*:*:*:*:*:*:*
ntp
Version:
4.3.4
CPE:
cpe:2.3:a:ntp:ntp:4.3.4:*:*:*:*:*:*:*
ntp
Version:
4.3.72
CPE:
cpe:2.3:a:ntp:ntp:4.3.72:*:*:*:*:*:*:*
ntp
Version:
4.3.8
CPE:
cpe:2.3:a:ntp:ntp:4.3.8:*:*:*:*:*:*:*
ntp
Version:
4.3.52
CPE:
cpe:2.3:a:ntp:ntp:4.3.52:*:*:*:*:*:*:*
ntp
Version:
4.2.2
CPE:
cpe:2.3:a:ntp:ntp:4.2.2:p2:*:*:*:*:*:*
ntp
Version:
4.3.17
CPE:
cpe:2.3:a:ntp:ntp:4.3.17:*:*:*:*:*:*:*
ntp
Version:
4.3.66
CPE:
cpe:2.3:a:ntp:ntp:4.3.66:*:*:*:*:*:*:*
ntp
Version:
4.3.64
CPE:
cpe:2.3:a:ntp:ntp:4.3.64:*:*:*:*:*:*:*
ntp
Version:
4.3.24
CPE:
cpe:2.3:a:ntp:ntp:4.3.24:*:*:*:*:*:*:*
ntp
Version:
4.3.3
CPE:
cpe:2.3:a:ntp:ntp:4.3.3:*:*:*:*:*:*:*
ntp
Version:
4.3.48
CPE:
cpe:2.3:a:ntp:ntp:4.3.48:*:*:*:*:*:*:*
ntp
Version:
4.3.85
CPE:
cpe:2.3:a:ntp:ntp:4.3.85:*:*:*:*:*:*:*
ntp
Version:
4.3.84
CPE:
cpe:2.3:a:ntp:ntp:4.3.84:*:*:*:*:*:*:*
ntp
Version:
4.3.89
CPE:
cpe:2.3:a:ntp:ntp:4.3.89:*:*:*:*:*:*:*
ntp
Version:
4.3.0
CPE:
cpe:2.3:a:ntp:ntp:4.3.0:*:*:*:*:*:*:*
ntp
Version:
4.3.27
CPE:
cpe:2.3:a:ntp:ntp:4.3.27:*:*:*:*:*:*:*
ntp
Version:
4.3.19
CPE:
cpe:2.3:a:ntp:ntp:4.3.19:*:*:*:*:*:*:*
ntp
Version:
4.3.45
CPE:
cpe:2.3:a:ntp:ntp:4.3.45:*:*:*:*:*:*:*
ntp
Version:
4.3.67
CPE:
cpe:2.3:a:ntp:ntp:4.3.67:*:*:*:*:*:*:*
ntp
Version:
4.3.16
CPE:
cpe:2.3:a:ntp:ntp:4.3.16:*:*:*:*:*:*:*
ntp
Version:
4.3.80
CPE:
cpe:2.3:a:ntp:ntp:4.3.80:*:*:*:*:*:*:*
ntp
Version:
4.3.2
CPE:
cpe:2.3:a:ntp:ntp:4.3.2:*:*:*:*:*:*:*
ntp
Version:
4.3.79
CPE:
cpe:2.3:a:ntp:ntp:4.3.79:*:*:*:*:*:*:*
ntp
Version:
4.2.4
CPE:
cpe:2.3:a:ntp:ntp:4.2.4:p0:*:*:*:*:*:*
ntp
Version:
4.3.18
CPE:
cpe:2.3:a:ntp:ntp:4.3.18:*:*:*:*:*:*:*
ntp
Version:
4.2.7
CPE:
cpe:2.3:a:ntp:ntp:4.2.7:-:*:*:*:*:*:*
ntp
Version:
4.3.51
CPE:
cpe:2.3:a:ntp:ntp:4.3.51:*:*:*:*:*:*:*
ntp
Version:
4.3.56
CPE:
cpe:2.3:a:ntp:ntp:4.3.56:*:*:*:*:*:*:*
ntp
Version:
4.3.34
CPE:
cpe:2.3:a:ntp:ntp:4.3.34:*:*:*:*:*:*:*
ntp
Version:
4.3.69
CPE:
cpe:2.3:a:ntp:ntp:4.3.69:*:*:*:*:*:*:*
ntp
Version:
4.3.28
CPE:
cpe:2.3:a:ntp:ntp:4.3.28:*:*:*:*:*:*:*
ntp
Version:
4.3.59
CPE:
cpe:2.3:a:ntp:ntp:4.3.59:*:*:*:*:*:*:*
ntp
Version:
4.3.71
CPE:
cpe:2.3:a:ntp:ntp:4.3.71:*:*:*:*:*:*:*
ntp
Version:
4.3.10
CPE:
cpe:2.3:a:ntp:ntp:4.3.10:*:*:*:*:*:*:*
ntp
Version:
4.3.20
CPE:
cpe:2.3:a:ntp:ntp:4.3.20:*:*:*:*:*:*:*
ntp
Version:
4.3.81
CPE:
cpe:2.3:a:ntp:ntp:4.3.81:*:*:*:*:*:*:*
ntp
Version:
4.3.74
CPE:
cpe:2.3:a:ntp:ntp:4.3.74:*:*:*:*:*:*:*
ntp
Version:
4.3.83
CPE:
cpe:2.3:a:ntp:ntp:4.3.83:*:*:*:*:*:*:*
ntp
Version:
4.3.65
CPE:
cpe:2.3:a:ntp:ntp:4.3.65:*:*:*:*:*:*:*
ntp
Version:
4.3.14
CPE:
cpe:2.3:a:ntp:ntp:4.3.14:*:*:*:*:*:*:*
ntp
Version:
4.3.43
CPE:
cpe:2.3:a:ntp:ntp:4.3.43:*:*:*:*:*:*:*
ntp
Version:
4.3.49
CPE:
cpe:2.3:a:ntp:ntp:4.3.49:*:*:*:*:*:*:*
ntp
Version:
4.3.12
CPE:
cpe:2.3:a:ntp:ntp:4.3.12:*:*:*:*:*:*:*
ntp
Version:
4.3.50
CPE:
cpe:2.3:a:ntp:ntp:4.3.50:*:*:*:*:*:*:*
ntp
Version:
4.3.1
CPE:
cpe:2.3:a:ntp:ntp:4.3.1:*:*:*:*:*:*:*
ntp
Version:
4.3.82
CPE:
cpe:2.3:a:ntp:ntp:4.3.82:*:*:*:*:*:*:*
ntp
Version:
4.3.13
CPE:
cpe:2.3:a:ntp:ntp:4.3.13:*:*:*:*:*:*:*
ntp
Version:
4.3.9
CPE:
cpe:2.3:a:ntp:ntp:4.3.9:*:*:*:*:*:*:*
ntp
Version:
4.3.5
CPE:
cpe:2.3:a:ntp:ntp:4.3.5:*:*:*:*:*:*:*
ntp
Version:
4.3.86
CPE:
cpe:2.3:a:ntp:ntp:4.3.86:*:*:*:*:*:*:*
ntp
Version:
4.2.0
CPE:
cpe:2.3:a:ntp:ntp:4.2.0:*:*:*:*:*:*:*
ntp
Version:
4.3.41
CPE:
cpe:2.3:a:ntp:ntp:4.3.41:*:*:*:*:*:*:*
ntp
Version:
4.3.30
CPE:
cpe:2.3:a:ntp:ntp:4.3.30:*:*:*:*:*:*:*
ntp
Version:
4.3.36
CPE:
cpe:2.3:a:ntp:ntp:4.3.36:*:*:*:*:*:*:*
ntp
Version:
4.3.11
CPE:
cpe:2.3:a:ntp:ntp:4.3.11:*:*:*:*:*:*:*
ntp
Version:
4.3.87
CPE:
cpe:2.3:a:ntp:ntp:4.3.87:*:*:*:*:*:*:*
ntp
Version:
4.3.55
CPE:
cpe:2.3:a:ntp:ntp:4.3.55:*:*:*:*:*:*:*
ntp
Version:
4.3.21
CPE:
cpe:2.3:a:ntp:ntp:4.3.21:*:*:*:*:*:*:*
ntp
Version:
4.3.33
CPE:
cpe:2.3:a:ntp:ntp:4.3.33:*:*:*:*:*:*:*
ntp
Version:
4.3.53
CPE:
cpe:2.3:a:ntp:ntp:4.3.53:*:*:*:*:*:*:*
ntp
Version:
4.3.31
CPE:
cpe:2.3:a:ntp:ntp:4.3.31:*:*:*:*:*:*:*
ntp
Version:
4.3.23
CPE:
cpe:2.3:a:ntp:ntp:4.3.23:*:*:*:*:*:*:*
ntp
Version:
4.3.68
CPE:
cpe:2.3:a:ntp:ntp:4.3.68:*:*:*:*:*:*:*
ntp
Version:
4.3.39
CPE:
cpe:2.3:a:ntp:ntp:4.3.39:*:*:*:*:*:*:*
ntp
Version:
4.3.29
CPE:
cpe:2.3:a:ntp:ntp:4.3.29:*:*:*:*:*:*:*
ntp
Version:
4.3.63
CPE:
cpe:2.3:a:ntp:ntp:4.3.63:*:*:*:*:*:*:*
ntp
Version:
4.3.91
CPE:
cpe:2.3:a:ntp:ntp:4.3.91:*:*:*:*:*:*:*
ntp
Version:
4.3.42
CPE:
cpe:2.3:a:ntp:ntp:4.3.42:*:*:*:*:*:*:*
ntp
Version:
4.3.54
CPE:
cpe:2.3:a:ntp:ntp:4.3.54:*:*:*:*:*:*:*
ntp
Version:
4.3.25
CPE:
cpe:2.3:a:ntp:ntp:4.3.25:*:*:*:*:*:*:*
opensuse
Version:
13.2
CPE:
cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*
leap
Version:
42.1
CPE:
cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*
solaris
Version:
11.3
CPE:
cpe:2.3:o:oracle:solaris:11.3:*:*:*:*:*:*:*
solaris
Version:
10
CPE:
cpe:2.3:o:oracle:solaris:10:*:*:*:*:*:sparc:*
openstack_cloud
Version:
5
CPE:
cpe:2.3:o:suse:openstack_cloud:5:*:*:*:*:*:*:*
manager_proxy
Version:
2.1
CPE:
cpe:2.3:o:suse:manager_proxy:2.1:*:*:*:*:*:*:*
linux_enterprise_server
Version:
12
CPE:
cpe:2.3:o:suse:linux_enterprise_server:12:sp5:*:*:-:*:*:*
linux_enterprise_server
Version:
11
CPE:
cpe:2.3:o:suse:linux_enterprise_server:11:sp1:*:*:-:*:*:*
linux_enterprise_desktop
Version:
12
CPE:
cpe:2.3:o:suse:linux_enterprise_desktop:12:sp4:*:*:*:*:*:*
This vulnerability affects 110 software configuration(s). Ensure you patch all affected systems.

References & Resources

Severity Details

5.9
out of 10.0
Medium

Weakness Type (CWE)

CWE-362

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Description
The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.
Exploit Likelihood
Medium
Typical Severity
High
Abstraction Level
Class

Key Information

Published Date
July 05, 2016