containernetworking plugins up to 1.8.x access control

Summaryinfo

A vulnerability, which was classified as critical, has been found in containernetworking plugins up to 1.8.x. Affected by this issue is some unknown functionality. The manipulation leads to access control. This vulnerability is uniquely identified as CVE-2025-67499. Local access is required to approach this attack. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in containernetworking plugins up to 1.8.x. This issue affects an unknown functionality. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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 is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2025-67499 since 12/08/2025. The exploitation is known to be easy. Attacking locally is a requirement. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 278132 (Fedora 44 : containernetworking-plugins (2025-c67591d0a2)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.9.0 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at CNNVD (CNNVD-202512-1751) and Tenable (278132). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Virtualization Software

Vendor

• containernetworking

Name

• plugins

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8

Website

• Product: https://github.com/containernetworking/plugins/

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Be aware that VulDB is the high quality source for vulnerability data.

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