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CVE-2025-67499— CNI Plugins Portmap nftables backend intercepts non-local traffic

Quick assessment

Affected
containernetworking plugins
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Plugins是CNI开源的一些参考和示例网络插件。 Plugins 1.6.0版本至1.8.0版本存在信息泄露漏洞，该漏洞源于nftables后端配置不当，可能导致流量拦截。

CVSS 6.6 · Medium EPSS 0.14% · P4
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I. Basic Information for CVE-2025-67499

Vulnerability Information
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Vulnerability Title
CNI Plugins Portmap nftables backend intercepts non-local traffic
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Plugins 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Plugins是CNI开源的一些参考和示例网络插件。 Plugins 1.6.0版本至1.8.0版本存在信息泄露漏洞，该漏洞源于nftables后端配置不当，可能导致流量拦截。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
containernetworking plugins >= 1.6.0, < 1.9.0 -

II. Public POCs for CVE-2025-67499

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III. Intelligence Information for CVE-2025-67499

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Patches & Fixes for CVE-2025-67499 (1)

Vendor Advisories for CVE-2025-67499 (1)

Other References for CVE-2025-67499 (1)

IV. Related Vulnerabilities

Same weakness: CWE-200

V. Comments for CVE-2025-67499

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