CVE-2025-67499
published 2025-12-10CVE-2025-67499: The CNI portmap plugin allows containers to emulate opening a host port, forwarding that traffic to the container. Versions 1.6.0 through 1.8.0 inadvertently…
PriorityP416low3.6CVSS 3.1
AVLACHPRLUINSUCLILAN
EPSS
0.12%
2.3th percentile
The CNI portmap plugin allows containers to emulate opening a host port, forwarding that traffic to the container. Versions 1.6.0 through 1.8.0 inadvertently forward all traffic with the same destination port as the host port when the portmap plugin is configured with the nftables backend, thus ignoring the destination IP. This includes traffic not intended for the node itself, i.e. traffic to containers hosted on the node. Containers that request HostPort forwarding can intercept all traffic destined for that port. This requires that the portmap plugin be explicitly configured to use the nftables backend. This issue is fixed in version 1.9.0. To workaround, configure the portmap plugin to use the iptables backend. It does not have this vulnerability.
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| containernetworking | plugins | — | — |
| github.com | containernetworking_plugins | >= 1.6.0 < 1.9.0 | 1.9.0 |
| linuxfoundation | cni_network_plugins | >= 1.6.0 < 1.9.0 | 1.9.0 |
CVSS provenance
nvdv3.13.6LOWCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
osv3.6LOW
vendor_redhat6.6MEDIUM
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OSV
CNA Plugins Portmap nftables backend can intercept non-local traffic in github.com/containernetworking/plugins
osv·2025-12-15
CVE-2025-67499 CNA Plugins Portmap nftables backend can intercept non-local traffic in github.com/containernetworking/plugins
CNA Plugins Portmap nftables backend can intercept non-local traffic in github.com/containernetworking/plugins
CNA Plugins Portmap nftables backend can intercept non-local traffic in github.com/containernetworking/plugins
OSV
CVE-2025-67499: The CNI portmap plugin allows containers to emulate opening a host port, forwarding that traffic to the container
osv·2025-12-10·CVSS 3.6
CVE-2025-67499 [LOW] CVE-2025-67499: The CNI portmap plugin allows containers to emulate opening a host port, forwarding that traffic to the container
The CNI portmap plugin allows containers to emulate opening a host port, forwarding that traffic to the container. Versions 1.6.0 through 1.8.0 inadvertently forward all traffic with the same destination port as the host port when the portmap plugin is configured with the nftables backend, thus ignoring the destination IP. This includes traffic not intended for the node itself, i.e. traffic to containers hosted on the node. Containers that request HostPort forwarding can intercept all traffic destined for that port. This requires that the portmap plugin be explicitly configured to use the nftables backend. This issue is fixed in version 1.9.0. To workaround, configure the portmap plugin to use the iptables backend. It does not have this vulnerability.
OSV
CNA Plugins Portmap nftables backend can intercept non-local traffic
osv·2025-12-09
CVE-2025-67499 [MEDIUM] CNA Plugins Portmap nftables backend can intercept non-local traffic
CNA Plugins Portmap nftables backend can intercept non-local traffic
### Background
The CNI `portmap` plugin allows containers to emulate opening a host port, forwarding that traffic to the container. For example, if a host has the IP 198.51.100.42, a container may request that all packets to `198.51.100.42:53` be forwarded to the container's network.
### Vulnerability
When the `portmap` plugin is configured with the `nftables` backend, it inadvertently forwards all traffic with the same destination port as the host port, **ignoring the destination IP**. This includes traffic not intended for the node itself, i.e. traffic to containers hosted on the node.
In the given example above, traffic destined to port 53 but for a _separate container_ would still be captured and forwarded, even
GHSA
CNA Plugins Portmap nftables backend can intercept non-local traffic
ghsa·2025-12-09
CVE-2025-67499 [MEDIUM] CWE-200 CNA Plugins Portmap nftables backend can intercept non-local traffic
CNA Plugins Portmap nftables backend can intercept non-local traffic
### Background
The CNI `portmap` plugin allows containers to emulate opening a host port, forwarding that traffic to the container. For example, if a host has the IP 198.51.100.42, a container may request that all packets to `198.51.100.42:53` be forwarded to the container's network.
### Vulnerability
When the `portmap` plugin is configured with the `nftables` backend, it inadvertently forwards all traffic with the same destination port as the host port, **ignoring the destination IP**. This includes traffic not intended for the node itself, i.e. traffic to containers hosted on the node.
In the given example above, traffic destined to port 53 but for a _separate container_ would still be captured and forwarded, even
Red Hat
CNI portmap plugin: github.com/containernetworking/plugins/plugins/meta/portmap: CNI portmap plugin: HostPort forwarding vulnerability allows traffic interception
vendor_redhat·2025-12-09·CVSS 6.6
CVE-2025-67499 [MEDIUM] CWE-200 CNI portmap plugin: github.com/containernetworking/plugins/plugins/meta/portmap: CNI portmap plugin: HostPort forwarding vulnerability allows traffic interception
CNI portmap plugin: github.com/containernetworking/plugins/plugins/meta/portmap: CNI portmap plugin: HostPort forwarding vulnerability allows traffic interception
The CNI portmap plugin allows containers to emulate opening a host port, forwarding that traffic to the container. Versions 1.6.0 through 1.8.0 inadvertently forward all traffic with the same destination port as the host port when the portmap plugin is configured with the nftables backend, thus ignoring the destination IP. This includes traffic not intended for the node itself, i.e. traffic to containers hosted on the node. Containers that request HostPort forwarding can intercept all traffic destined for that port. This requires that the portmap plugin be explicitly configured to use the nftables backend. This issue is fixed in
No detection rules found.
No public exploits indexed.
2025-12-10
Published