CVE-2025-67499

Description

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.

CVSS v3.1 Score

6.6

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H

Weakness Type (CWE)

CWE-200 CWE-200

Affected Products

Vendor	Product	Versions
linuxfoundation	cni_network_plugins	1.6.0 — 1.9.0

References

Advisories & Patches

https://github.com/containernetworking/plugins/pull/1210 https://github.com/containernetworking/plugins/security/advisories/GHSA-jv3w-x3r3-g6rm

Other References

https://github.com/containernetworking/plugins/releases/tag/v1.9.0

Frequently Asked Questions

What is CVE-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 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. It has a CVSS v3.1 base score of 6.6 (MEDIUM).

How severe is CVE-2025-67499? +

CVE-2025-67499 has a CVSS v3.1 score of 6.6 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-67499? +

CVE-2025-67499 affects products from linuxfoundation, specifically: cni_network_plugins. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-67499? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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