Meyskens

**Name of the Vulnerable Software and Affected Versions** Cilium versions prior to 1.13.4 **Description** The issue arises when Gateway API is enabled in Cilium, allowing an attacker on an affected cluster to leverage the absence of a check on the namespace in which a `ReferenceGrant` is created. This could result in Cilium unintentionally gaining visibility of secrets, including certificates, and services across namespaces. An attacker can use cluster secrets that should not be visible to them or communicate with services they should not have access to. Gateway API functionality is disabled by default. **Recommendations** As a temporary workaround, restrict the creation of `ReferenceGrant` resources to admin users by using Kubernetes RBAC. Update to Cilium release 1.13.4 or later to fix the issue.

**Name of the Vulnerable Software and Affected Versions** Cilium versions prior to 1.11.16 Cilium versions prior to 1.12.9 Cilium versions prior to 1.13.2 **Description** Cilium is a networking, observability, and security solution with an eBPF-based dataplane. When run in debug mode, Cilium will log the contents of the `cilium-secrets` namespace, which could include data such as TLS private keys for Ingress and GatewayAPI resources. An attacker with access to debug output from the Cilium containers could use the resulting output to intercept and modify traffic to and from the affected cluster. Output of the sensitive information would occur at Cilium agent restart, when secrets in the namespace are modified, and on creation of Ingress or GatewayAPI resources. **Recommendations** For Cilium versions prior to 1.11.16, update to version 1.11.16 or later. For Cilium versions prior to 1.12.9, update to version 1.12.9 or later. For Cilium versions prior to 1.13.2, update to version 1.13.2 or later. As a temporary workaround, consider disabling debug mode until a patch is available.