Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2016-7426

Severity CVSS v4.0:
Pending analysis
Type:
CWE-400 Uncontrolled Resource Consumption ('Resource Exhaustion')
Publication date:
13/01/2017
Last modified:
20/04/2025

Description

NTP before 4.2.8p9 rate limits responses received from the configured sources when rate limiting for all associations is enabled, which allows remote attackers to cause a denial of service (prevent responses from the sources) by sending responses with a spoofed source address.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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

Base Score 3.x
7.50
Severity 3.x
HIGH
Vector 2.0
AV:N/AC:M/Au:N/C:N/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 4.30 MEDIUM
Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Medium
Authentication (Au): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Physical

Base Score 2.0
4.30
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:ntp:ntp:*:*:*:*:*:*:*:* 4.2.6 (including) 4.2.8 (excluding)
cpe:2.3:a:ntp:ntp:*:*:*:*:*:*:*:* 4.3.0 (including) 4.3.94 (excluding)
cpe:2.3:a:ntp:ntp:4.2.5:p203:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.2.5:p204:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.2.5:p205:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.2.5:p206:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.2.5:p207:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.2.5:p208:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.2.5:p209:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.2.5:p210:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.2.5:p211:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.2.5:p212:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.2.5:p213:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.2.5:p214:*:*:*:*:*:*
cpe:2.3:a:ntp:ntp:4.2.5:p215:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools