CVE-2019-9946
7.5 · HIGHOverview
CVE-2019-9946 is a high-severity vulnerability affecting cncf portmap. It was published on April 2, 2019 and has a CVSS 3.0 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from cncf. Update portmap to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| cncf | portmap | >= 0, < 0.7.5 | Affected |
| kubernetes | kubernetes | >= 0, < 1.11.9 | Affected |
References
Frequently Asked Questions
What is CVE-2019-9946?
CVE-2019-9946 is a high-severity vulnerability affecting cncf portmap. It was published on April 2, 2019 and has a CVSS 3.0 base score of 7.5 (HIGH).
How severe is CVE-2019-9946?
This vulnerability has a CVSS 3.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2019-9946?
Check the references section for vendor advisories and patches from cncf. Update portmap to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2019-9946?
CyberStrike's AI-powered security agents can automatically detect CVE-2019-9946 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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