Cilium up to 1.15.14/1.16.7/1.17.1 authorization

Summaryinfo

A vulnerability marked as problematic has been reported in Cilium up to 1.15.14/1.16.7/1.17.1. Affected is an unknown function. This manipulation causes authorization. This vulnerability is handled as CVE-2025-30162. It is possible to launch the attack on the local host. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Cilium up to 1.15.14/1.16.7/1.17.1. Affected by this vulnerability is an unknown code. The manipulation with an unknown input leads to a authorization vulnerability. The CWE definition for the vulnerability is CWE-863. The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions. As an impact it is known to affect confidentiality. The summary by CVE is:

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. For Cilium users who use Gateway API for Ingress for some services and use LB-IPAM or BGP for LB Service implementation and use network policies to block egress traffic from workloads in a namespace to workloads in other namespaces, egress traffic from workloads covered by such network policies to LoadBalancers configured by `Gateway` resources will incorrectly be allowed. LoadBalancer resources not deployed via a Gateway API configuration are not affected by this issue. This issue affects: Cilium v1.15 between v1.15.0 and v1.15.14 inclusive, v1.16 between v1.16.0 and v1.16.7 inclusive, and v1.17 between v1.17.0 and v1.17.1 inclusive. This issue is fixed in Cilium v1.15.15, v1.16.8, and v1.17.2. A Clusterwide Cilium Network Policy can be used to work around this issue for users who are unable to upgrade.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2025-30162 since 03/17/2025. The exploitation appears to be difficult. Attacking locally is a requirement. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 261588 (Linux Distros Unpatched Vulnerability : CVE-2025-30162), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.15.15, 1.16.8 or 1.17.2 eliminates this vulnerability. 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 vulnerability database at Tenable (261588). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

• Cilium

Version

• 1.15.0
• 1.15.1
• 1.15.2
• 1.15.3
• 1.15.4
• 1.15.5
• 1.15.6
• 1.15.7
• 1.15.8
• 1.15.9
• 1.15.10
• 1.15.11
• 1.15.12
• 1.15.13
• 1.15.14
• 1.16.0
• 1.16.1
• 1.16.2
• 1.16.3
• 1.16.4
• 1.16.5
• 1.16.6
• 1.16.7
• 1.17.0
• 1.17.1

Website

• Product: https://github.com/cilium/cilium/

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

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