Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cncf | Portmap | < 0.7.5 |
| Kubernetes | Kubernetes | < 1.11.9 |
| Netapp | Cloud Insights | - |
Related Weaknesses (CWE)
References
- https://access.redhat.com/errata/RHBA-2019:0862
- https://github.com/containernetworking/plugins/pull/269#issuecomment-477683272PatchThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.netapp.com/advisory/ntap-20190416-0002/PatchThird Party Advisory
- https://access.redhat.com/errata/RHBA-2019:0862
- https://github.com/containernetworking/plugins/pull/269#issuecomment-477683272PatchThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.netapp.com/advisory/ntap-20190416-0002/PatchThird Party Advisory
FAQ
What is CVE-2019-9946?
CVE-2019-9946 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 ...
How severe is CVE-2019-9946?
CVE-2019-9946 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-9946?
Check the references section above for vendor advisories and patch information. Affected products include: Cncf Portmap, Kubernetes Kubernetes, Netapp Cloud Insights.