{"id":"GHSA-jv3w-x3r3-g6rm","revision":"d514b92c460740eb940f2b90362729a5","records":[{"revision":"d514b92c460740eb940f2b90362729a5","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-jv3w-x3r3-g6rm","aliases":["CVE-2025-67499","GO-2025-4222"],"title":"CNA Plugins Portmap nftables backend can intercept non-local traffic","description":"### Background\n\nThe 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.\n\n### Vulnerability\n\nWhen 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.\n\nIn the given example above, traffic destined to port 53 but for a _separate container_ would still be captured and forwarded, even though it was not destined for the host.\n\n### Impact\n\nContainers (i.e. kubernetes pods) 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. (The `iptables` backend is the default.)\n\n### Patches\nThis is fixed as of CNI plugins v1.9.0\n\n### Workarounds\nConfigure the `portmap` plugin to use the `iptables` backend. It does not have this vulnerability.","state":0,"publishedAt":"2025-12-09T17:18:59+00:00","modifiedAt":"2026-09-10T03:50:31.9368825+00:00","affected":[{"ecosystem":"Go","name":"github.com/containernetworking/plugins","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"1.6.0"},{"kind":"fixed","version":"1.9.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/containernetworking/plugins/security/advisories/GHSA-jv3w-x3r3-g6rm","https://nvd.nist.gov/vuln/detail/CVE-2025-67499","https://github.com/containernetworking/plugins/pull/1210","https://github.com/containernetworking/plugins/commit/9b3772e1a7abf93cbb7c6526a28bc0d27b830e02","https://github.com/containernetworking/plugins","https://github.com/containernetworking/plugins/releases/tag/v1.9.0","https://pkg.go.dev/vuln/GO-2026-4222"],"sourceUrl":"https://github.com/advisories/GHSA-jv3w-x3r3-g6rm","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-jv3w-x3r3-g6rm","identifiers":["GHSA-jv3w-x3r3-g6rm","CVE-2025-67499","GO-2025-4222"]},"retained":false,"historicalAffected":[]}],"coverage":[]}