National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2019-9946 Detail

Current 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.

Source:  MITRE
Description Last Modified:  04/02/2019
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 7.5 HIGH
Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N (V3 legend)
Impact Score: 3.6
Exploitability Score: 3.9


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

CVSS v2.0 Severity and Metrics:

Base Score: 5.0 MEDIUM
Vector: (AV:N/AC:L/Au:N/C:N/I:P/A:N) (V2 legend)
Impact Subscore: 2.9
Exploitability Subscore: 10.0


Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (AU): None
Confidentiality (C): None
Integrity (I): Partial
Availability (A): None
Additional Information:
Allows unauthorized modification

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://github.com/containernetworking/plugins/pull/269#issuecomment-477683272 Patch Third Party Advisory
https://security.netapp.com/advisory/ntap-20190416-0002/ Patch Third Party Advisory

Technical Details

Vulnerability Type (View All)

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:cncf:portmap:*:*:*:*:*:container_networking_interface:*:*
     Show Matching CPE(s)
Up to (excluding)
0.7.5
 cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
1.11.9
 cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
1.12.0
Up to (excluding)
1.12.7
 cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
1.13.0
Up to (excluding)
1.13.5
 cpe:2.3:a:kubernetes:kubernetes:1.13.6:beta0:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:kubernetes:kubernetes:1.14.0:alpha0:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:kubernetes:kubernetes:1.14.0:alpha1:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:kubernetes:kubernetes:1.14.0:alpha2:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:kubernetes:kubernetes:1.14.0:alpha3:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:kubernetes:kubernetes:1.14.0:beta0:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:kubernetes:kubernetes:1.14.0:beta1:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:kubernetes:kubernetes:1.14.0:beta2:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:kubernetes:kubernetes:1.14.0:rc1:*:*:*:*:*:*
     Show Matching CPE(s)

Configuration 2 ( hide )
 cpe:2.3:a:netapp:cloud_insights:-:*:*:*:*:*:*:*
     Show Matching CPE(s)


Change History

3 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-9946
NVD Published Date:
04/02/2019
NVD Last Modified:
04/16/2019