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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | kubernetes | 1.17.4-1 | — |
| Debian 13 | kubernetes | 1.17.4-1 | — |
| Debian 12 | kubernetes | 1.17.4-1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | buildah +1 | 1.9.0-5.module+el8.1.0+4240+893c1ab8 | RHSA-2019:3403 |
| RHEL 8 | cockpit-podman | 4-1.module+el8.1.0+4081+b29780af | RHSA-2019:3403 |
| RHEL 8 | container-selinux | 2:2.107-2.module+el8.1.0+4081+b29780af | RHSA-2019:3403 |
| RHEL 8 | containernetworking-plugins | 0.8.1-2.module+el8.1.0+4081+b29780af | RHSA-2019:3403 |
| RHEL 8 | fuse-overlayfs | 0.4.1-1.module+el8.1.0+4081+b29780af | RHSA-2019:3403 |
| RHEL 8 | oci-systemd-hook | 1:0.1.15-2.git2d0b8a3.module+el8.1.0+4081+b29780af | RHSA-2019:3403 |
| RHEL 8 | oci-umount | 2:2.3.4-2.git87f9237.module+el8.1.0+4081+b29780af | RHSA-2019:3403 |
| RHEL 8 | podman +4 | 1.4.2-5.module+el8.1.0+4240+893c1ab8 | RHSA-2019:3403 |
| RHEL 8 | python-podman-api | 1.2.0-0.1.gitd0a45fe.module+el8.1.0+4081+b29780af | RHSA-2019:3403 |
| RHEL 8 | runc | 1.0.0-60.rc8.module+el8.1.0+4081+b29780af | RHSA-2019:3403 |
| RHEL 8 | skopeo +2 | 1:0.1.37-5.module+el8.1.0+4240+893c1ab8 | RHSA-2019:3403 |
| RHEL 8 | slirp4netns | 0.3.0-4.module+el8.1.0+4306+1d917805 | RHSA-2019:3403 |
| RHEL 8 | toolbox | 0.0.4-1.module+el8.1.0+4081+b29780af | RHSA-2019:3403 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Extras Other 7 | containernetworking-plugins | 0.7.5-2.el7 | RHBA-2019:0862 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | oci-systemd-hook | 1:0.1.15-2.git2d0b8a3.module_el8.3.0+2044+12421f43 | ALSA-2019:3403 |
| AlmaLinux 8 | oci-umount | 2:2.3.4-2.git87f9237.module_el8.3.0+2044+12421f43 | ALSA-2019:3403 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | oci-systemd-hook | 1:0.1.15-2.git2d0b8a3.module+el8.4.0+557+48ba8b2f | RLSA-2019:3403 |
| Rocky Linux 8 | oci-umount | 2:2.3.4-2.git87f9237.module+el8.4.0+557+48ba8b2f | RLSA-2019:3403 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | k3s | 1.21.3+k3s1-1.2 | openSUSE-SU-2024:10884-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | containerd | 1.2.6-r0 | — |
| Alpine v3.23 | containerd | 1.2.6-r0 | — |
| Alpine v3.22 | containerd | 1.2.6-r0 | — |
| Alpine v3.21 | containerd | 1.2.6-r0 | — |
| Alpine v3.20 | containerd | 1.2.6-r0 | — |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | containerd | 1.2.6-r0 | — |
| Alpine v3.18 | containerd | 1.2.6-r0 | — |
| Alpine v3.17 | containerd | 1.2.6-r0 | — |
| Alpine v3.16 | containerd | 1.2.6-r0 | — |
| Alpine v3.15 | containerd | 1.2.6-r0 | — |
| Alpine v3.14 | containerd | 1.2.6-r0 | — |
| Alpine v3.13 | containerd | 1.2.6-r0 | — |
| Alpine v3.12 | containerd | 1.2.6-r0 | — |
| Alpine v3.11 | containerd | 1.2.6-r0 | — |
| Alpine v3.10 | containerd | 1.2.6-r0 | — |
| Alpine v3.9 | containerd | 1.2.6 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | kubeadm +2 | 1.12.7-1.1.2.el7 | ELSA-2019-4593 |
| Oracle Linux 7 | kubeadm-ha-setup | 0.0.2-1.0.24.el7 | ELSA-2019-4593 |
| Oracle Linux 7 | kubeadm-upgrade | 0.0.1-1.0.22.el7 | ELSA-2019-4593 |
| Oracle Linux 7 | kubernetes-cni | 0.6.0-2.2.1.el7 | ELSA-2019-4593 |
| Oracle Linux 7 | kubernetes-cni-plugins | 0.7.5-1.0.1.el7 | ELSA-2019-4593 |
Advisories 6
- ALSA-2019:3403 Important: container-tools:rhel8 security, bug fix, and enhancement update AlmaLinux Security Advisories · Nov 5, 2026
- RHSA-2019:3403 Red Hat Security Advisory: container-tools:rhel8 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RLSA-2019:3403 Important: container-tools:rhel8 security, bug fix, and enhancement update Rocky Linux Security Advisories · Feb 5, 2026
- openSUSE-SU-2024:10884-1 k3s-1.21.3+k3s1-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- RHBA-2019:0862 Red Hat Bug Fix Advisory: containernetworking-plugins bug fix and enhancement update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- ELSA-2019-4593 Important: kubernetes kubeadm-upgrade kubeadm-ha-setup security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Apr 13, 2019
References
- https://github.com/containernetworking/plugins/pull/269#issuecomment-477683272
- https://security.netapp.com/advisory/ntap-20190416-0002/
- RHBA-2019:0862 vendor-advisory
- FEDORA-2019-d2b57d3b19 vendor-advisory
- FEDORA-2019-24217abfdf vendor-advisory