National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2016-2517 Detail

Current Description

NTP before 4.2.8p7 and 4.3.x before 4.3.92 allows remote attackers to cause a denial of service (prevent subsequent authentication) by leveraging knowledge of the controlkey or requestkey and sending a crafted packet to ntpd, which changes the value of trustedkey, controlkey, or requestkey. NOTE: this vulnerability exists because of a CVE-2016-2516 regression.

Source:  MITRE
Description Last Modified:  01/30/2017
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 5.3 MEDIUM
Vector: AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H (V3 legend)
Impact Score: 3.6
Exploitability Score: 1.6


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

CVSS v2.0 Severity and Metrics:

Base Score: 4.9 MEDIUM
Vector: (AV:N/AC:H/Au:S/C:N/I:N/A:C) (V2 legend)
Impact Subscore: 6.9
Exploitability Subscore: 3.9


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

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://support.ntp.org/bin/view/Main/NtpBug3010 Vendor Advisory
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html Third Party Advisory
http://www.securityfocus.com/bid/88189 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1035705
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc
https://security.gentoo.org/glsa/201607-15
https://security.netapp.com/advisory/ntap-20171004-0002/
https://www.kb.cert.org/vuls/id/718152 Third Party Advisory US Government Resource

Technical Details

Vulnerability Type (View All)

Vulnerable software and versions Switch to CPE 2.2

Configuration 1
OR
cpe:2.3:a:ntp:ntp:*:p6:*:*:*:*:*:*    versions up to (including) 4.2.8
Configuration 2
OR
cpe:2.3:a:ntp:ntp:4.3.0:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.1:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.2:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.3:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.4:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.5:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.6:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.7:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.8:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.9:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.10:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.11:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.12:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.13:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.14:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.15:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.16:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.17:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.18:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.19:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.20:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.21:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.22:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.23:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.24:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.25:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.26:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.27:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.28:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.29:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.30:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.31:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.32:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.33:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.34:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.35:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.36:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.37:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.38:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.39:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.40:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.41:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.42:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.43:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.44:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.45:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.46:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.47:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.48:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.49:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.50:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.51:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.52:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.53:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.54:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.55:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.56:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.57:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.58:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.59:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.60:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.61:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.62:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.63:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.64:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.65:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.66:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.67:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.68:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.69:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.70:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.71:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.72:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.73:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.74:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.75:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.76:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.77:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.78:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.79:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.80:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.81:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.82:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.83:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.84:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.85:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.86:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.87:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.88:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.89:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.90:*:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.3.91:*:*:*:*:*:*:*

Denotes Vulnerable Software
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Change History

7 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2016-2517
NVD Published Date:
01/30/2017
NVD Last Modified:
11/20/2017