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

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CVE-2019-9946

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
02/04/2019
Last modified:
07/11/2023

Description

Cloud Native Computing Foundation (CNCF) CNI (Container Networking Interface) 0.7.4 has a network firewall misconfiguration which affects Kubernetes. The CNI 'portmap' plugin, used to setup HostPorts for CNI, inserts rules at the front of the iptables nat chains; which take precedence over the KUBE- SERVICES chain. Because of this, the HostPort/portmap rule could match incoming traffic even if there were better fitting, more specific service definition rules like NodePorts later in the chain. The issue is fixed in CNI 0.7.5 and Kubernetes 1.11.9, 1.12.7, 1.13.5, and 1.14.0.

Impact

Vector 3.x
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

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

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

Base Score: 5.00 MEDIUM
Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N

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

Base Score 2.0
5.00
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:cncf:portmap:*:*:*:*:*:container_networking_interface:*:* 0.7.5 (excluding)
cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:* 1.11.9 (excluding)
cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:* 1.12.0 (including) 1.12.7 (excluding)
cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:* 1.13.0 (including) 1.13.5 (excluding)
cpe:2.3:a:kubernetes:kubernetes:1.13.6:beta0:*:*:*:*:*:*
cpe:2.3:a:kubernetes:kubernetes:1.14.0:alpha0:*:*:*:*:*:*
cpe:2.3:a:kubernetes:kubernetes:1.14.0:alpha1:*:*:*:*:*:*
cpe:2.3:a:kubernetes:kubernetes:1.14.0:alpha2:*:*:*:*:*:*
cpe:2.3:a:kubernetes:kubernetes:1.14.0:alpha3:*:*:*:*:*:*
cpe:2.3:a:kubernetes:kubernetes:1.14.0:beta0:*:*:*:*:*:*
cpe:2.3:a:kubernetes:kubernetes:1.14.0:beta1:*:*:*:*:*:*
cpe:2.3:a:kubernetes:kubernetes:1.14.0:beta2:*:*:*:*:*:*
cpe:2.3:a:kubernetes:kubernetes:1.14.0:rc1:*:*:*:*:*:*
cpe:2.3:a:netapp:cloud_insights:-:*:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools