Improper Enforcement of Behavioral Workflow Affecting container-tools:rhel8/containernetworking-plugins package, versions <0:0.8.1-2.module+el8.1.0+4081+b29780af
Threat Intelligence
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Start learning- Snyk IDSNYK-RHEL8-CONTAINERTOOLS-3522779
- published26 Jul 2021
- disclosed28 Mar 2019
Introduced: 28 Mar 2019
CVE-2019-9946 (opens in a new tab)How to fix?
Upgrade RHEL:8 container-tools:rhel8/containernetworking-plugins to version 0:0.8.1-2.module+el8.1.0+4081+b29780af or higher.
This issue was patched in RHSA-2019:3403.
NVD Description
Note: Versions mentioned in the description apply only to the upstream container-tools:rhel8/containernetworking-plugins package and not the container-tools:rhel8/containernetworking-plugins package as distributed by RHEL.
See How to fix? for RHEL:8 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://github.com/containernetworking/plugins/pull/269#issuecomment-477683272
- https://security.netapp.com/advisory/ntap-20190416-0002/
- https://access.redhat.com/security/cve/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://access.redhat.com/errata/RHBA-2019:0862
- https://access.redhat.com/errata/RHSA-2019:3403
- 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/