National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2016-4955 Detail

Current 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.

Source:  MITRE
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 4.0 MEDIUM
Vector: AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:L (V3.0 legend)
Impact Score: 1.4
Exploitability Score: 2.2


Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): None
Integrity (I): None
Availability (A): Low

CVSS v2.0 Severity and Metrics:

Base Score: 2.6 LOW
Vector: (AV:N/AC:H/Au:N/C:N/I:N/A:P) (V2 legend)
Impact Subscore: 2.9
Exploitability Subscore: 4.9


Access Vector (AV): Network
Access Complexity (AC): High
Authentication (AU): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Partial
Additional Information:
Allows disruption of service

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://bugs.ntp.org/3043
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00023.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00040.html Third Party Advisory
http://support.ntp.org/bin/view/Main/NtpBug3043 Patch Vendor Advisory
http://support.ntp.org/bin/view/Main/SecurityNotice Vendor Advisory
http://www.kb.cert.org/vuls/id/321640 Third Party Advisory US Government Resource
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html Third Party Advisory
http://www.securityfocus.com/bid/91007
http://www.securitytracker.com/id/1036037
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:24.ntp.asc
https://security.gentoo.org/glsa/201607-15

Technical Details

Vulnerability Type (View All)

  • Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') (CWE-362)

Known Affected Software Configurations Switch to CPE 2.3

Configuration 1 ( hide )
 cpe:/o:oracle:solaris:10
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 cpe:/o:oracle:solaris:11.3
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Configuration 2 ( hide )
 cpe:/o:novell:suse_linux_enterprise_debuginfo:11.0:sp2
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 cpe:/o:novell:suse_linux_enterprise_debuginfo:11.0:sp3
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 cpe:/o:novell:suse_linux_enterprise_debuginfo:11.0:sp4
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 cpe:/o:novell:suse_linux_enterprise_desktop:12.0:sp1
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 cpe:/o:novell:suse_linux_enterprise_server:11.0:sp2:~~ltss~~~
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 cpe:/o:novell:suse_linux_enterprise_server:11.0:sp3:~~ltss~~~
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 cpe:/o:novell:suse_linux_enterprise_server:11.0:sp4
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 cpe:/o:novell:suse_linux_enterprise_server:12.0:sp1
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 cpe:/o:novell:suse_manager:2.1
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 cpe:/o:novell:suse_manager_proxy:2.1
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 cpe:/o:novell:suse_openstack_cloud:5
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 cpe:/o:opensuse:leap:42.1
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 cpe:/o:opensuse:opensuse:13.2
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Configuration 3 ( hide )
 cpe:/a:ntp:ntp:4.0.72
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 cpe:/a:ntp:ntp:4.0.73
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 cpe:/a:ntp:ntp:4.0.90
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 cpe:/a:ntp:ntp:4.0.91
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 cpe:/a:ntp:ntp:4.0.92
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 cpe:/a:ntp:ntp:4.0.93
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 cpe:/a:ntp:ntp:4.0.94
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 cpe:/a:ntp:ntp:4.0.95
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 cpe:/a:ntp:ntp:4.0.96
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 cpe:/a:ntp:ntp:4.0.97
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 cpe:/a:ntp:ntp:4.0.98
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 cpe:/a:ntp:ntp:4.0.99
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 cpe:/a:ntp:ntp:4.1.0
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 cpe:/a:ntp:ntp:4.1.2
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 cpe:/a:ntp:ntp:4.2.0
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 cpe:/a:ntp:ntp:4.2.2
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 cpe:/a:ntp:ntp:4.2.2:p1
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 cpe:/a:ntp:ntp:4.2.2:p2
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 cpe:/a:ntp:ntp:4.2.2:p3
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 cpe:/a:ntp:ntp:4.2.2:p4
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 cpe:/a:ntp:ntp:4.2.4
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 cpe:/a:ntp:ntp:4.2.4:p0
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 cpe:/a:ntp:ntp:4.2.4:p1
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 cpe:/a:ntp:ntp:4.2.4:p2
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 cpe:/a:ntp:ntp:4.2.4:p3
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 cpe:/a:ntp:ntp:4.2.4:p4
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 cpe:/a:ntp:ntp:4.2.4:p5
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 cpe:/a:ntp:ntp:4.2.4:p6
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 cpe:/a:ntp:ntp:4.2.4:p7
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 cpe:/a:ntp:ntp:4.2.4:p7_rc1
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 cpe:/a:ntp:ntp:4.2.4:p7_rc2
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 cpe:/a:ntp:ntp:4.2.4:p7_rc3
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 cpe:/a:ntp:ntp:4.2.4:p7_rc4
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 cpe:/a:ntp:ntp:4.2.4:p7_rc5
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 cpe:/a:ntp:ntp:4.2.4:p7_rc6
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 cpe:/a:ntp:ntp:4.2.4:p7_rc7
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 cpe:/a:ntp:ntp:4.2.4:p8
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 cpe:/a:ntp:ntp:4.2.5:p124
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 cpe:/a:ntp:ntp:4.2.5:p125
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 cpe:/a:ntp:ntp:4.2.5:p126
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 cpe:/a:ntp:ntp:4.2.5:p127
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 cpe:/a:ntp:ntp:4.2.5:p128
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 cpe:/a:ntp:ntp:4.2.5:p129
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 cpe:/a:ntp:ntp:4.2.5:p130
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 cpe:/a:ntp:ntp:4.2.5:p131
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 cpe:/a:ntp:ntp:4.2.5:p132
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 cpe:/a:ntp:ntp:4.2.5:p133
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 cpe:/a:ntp:ntp:4.2.5:p134
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 cpe:/a:ntp:ntp:4.2.5:p135
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 cpe:/a:ntp:ntp:4.2.5:p136
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 cpe:/a:ntp:ntp:4.2.5:p137
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 cpe:/a:ntp:ntp:4.2.5:p138
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 cpe:/a:ntp:ntp:4.2.5:p139
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 cpe:/a:ntp:ntp:4.2.5:p140
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 cpe:/a:ntp:ntp:4.2.5:p141
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 cpe:/a:ntp:ntp:4.2.5:p142
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 cpe:/a:ntp:ntp:4.2.5:p143
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 cpe:/a:ntp:ntp:4.2.5:p144
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 cpe:/a:ntp:ntp:4.2.5:p145
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 cpe:/a:ntp:ntp:4.2.5:p146
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 cpe:/a:ntp:ntp:4.2.5:p147
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 cpe:/a:ntp:ntp:4.2.5:p148
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 cpe:/a:ntp:ntp:4.2.5:p149
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 cpe:/a:ntp:ntp:4.2.5:p150
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 cpe:/a:ntp:ntp:4.2.5:p151
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 cpe:/a:ntp:ntp:4.2.5:p152
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 cpe:/a:ntp:ntp:4.2.5:p153
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 cpe:/a:ntp:ntp:4.2.5:p154
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 cpe:/a:ntp:ntp:4.2.5:p155
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 cpe:/a:ntp:ntp:4.2.5:p156
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 cpe:/a:ntp:ntp:4.2.5:p157
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 cpe:/a:ntp:ntp:4.2.5:p158
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 cpe:/a:ntp:ntp:4.2.5:p159
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 cpe:/a:ntp:ntp:4.2.5:p160
     Show Matching CPE(s)
 cpe:/a:ntp:ntp:4.2.5:p161
     Show Matching CPE(s)
 cpe:/a:ntp:ntp:4.2.5:p162
     Show Matching CPE(s)
 cpe:/a:ntp:ntp:4.2.5:p163
     Show Matching CPE(s)
 cpe:/a:ntp:ntp:4.2.5:p164
     Show Matching CPE(s)
 cpe:/a:ntp:ntp:4.2.5:p165
     Show Matching CPE(s)
 cpe:/a:ntp:ntp:4.2.5:p166
     Show Matching CPE(s)
 cpe:/a:ntp:ntp:4.2.5:p167
     Show Matching CPE(s)
 cpe:/a:ntp:ntp:4.2.5:p168
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 cpe:/a:ntp:ntp:4.2.5:p169
     Show Matching CPE(s)
 cpe:/a:ntp:ntp:4.2.5:p170
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 cpe:/a:ntp:ntp:4.2.5:p171
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 cpe:/a:ntp:ntp:4.2.5:p172
     Show Matching CPE(s)

Showing 100 of 725 CPEs, view all CPEs here.

Change History

13 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2016-4955
NVD Published Date:
07/04/2016
NVD Last Modified:
10/30/2018