Always-Incorrect Control Flow Implementation Affecting kubernetes package, versions <1.17.4-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIANUNSTABLE-KUBERNETES-585904
- published24 Jul 2019
- disclosed2 Apr 2019
Introduced: 2 Apr 2019
CVE-2019-9946 (opens in a new tab)How to fix?
Upgrade Debian:unstable kubernetes to version 1.17.4-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kubernetes package and not the kubernetes package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2019-9946
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9946
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FCN66VYB3XS76SYH567SO7N3I254JOCT/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SGOOWAELGH3F7OXRBPH3HCNZELNLXYTW/
- https://github.com/containernetworking/plugins/pull/269#issuecomment-477683272
- https://security.netapp.com/advisory/ntap-20190416-0002/
- https://access.redhat.com/errata/RHBA-2019:0862
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FCN66VYB3XS76SYH567SO7N3I254JOCT/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SGOOWAELGH3F7OXRBPH3HCNZELNLXYTW/