Vulnerability Monitor

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CVE-2019-9946

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.

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.5, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts integrity (unauthorized modifications), for affected systems. Impacting 3 products from cncf, from kubernetes, from netapp organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2019, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2019-04-02T18:30:26.583

Last Modified

2024-11-21T04:52:38.937

Status

Modified

Source

[email protected]

Severity

CVSSv3.0: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:P/A:N

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-670

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	cncf	portmap	< 0.7.5	Yes
Application	kubernetes	kubernetes	< 1.11.9	Yes
Application	kubernetes	kubernetes	< 1.12.7	Yes
Application	kubernetes	kubernetes	< 1.13.5	Yes
Application	kubernetes	kubernetes	1.13.6	Yes
Application	kubernetes	kubernetes	1.14.0	Yes
Application	kubernetes	kubernetes	1.14.0	Yes
Application	kubernetes	kubernetes	1.14.0	Yes
Application	kubernetes	kubernetes	1.14.0	Yes
Application	kubernetes	kubernetes	1.14.0	Yes
Application	kubernetes	kubernetes	1.14.0	Yes
Application	kubernetes	kubernetes	1.14.0	Yes
Application	kubernetes	kubernetes	1.14.0	Yes
Application	netapp	cloud_insights	-	Yes

References

https://access.redhat.com/errata/RHBA-2019:0862 ([email protected])
https://github.com/containernetworking/plugins/pull/269#issuecomment-477683272 Patch, Third Party Advisory ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FCN66VYB3XS76SYH567SO7N3I254JOCT/ ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SGOOWAELGH3F7OXRBPH3HCNZELNLXYTW/ ([email protected])
https://security.netapp.com/advisory/ntap-20190416-0002/ Patch, Third Party Advisory ([email protected])
https://access.redhat.com/errata/RHBA-2019:0862 (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/containernetworking/plugins/pull/269#issuecomment-477683272 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FCN66VYB3XS76SYH567SO7N3I254JOCT/ (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SGOOWAELGH3F7OXRBPH3HCNZELNLXYTW/ (af854a3a-2127-422b-91ae-364da2661108)
https://security.netapp.com/advisory/ntap-20190416-0002/ Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For cncf's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.