Daniel-F3

**Name of the Vulnerable Software and Affected Versions** Cilium versions prior to 1.11.15 Cilium versions prior to 1.12.8 Cilium versions prior to 1.13.1 **Description** Cilium is a networking, observability, and security solution with an eBPF-based dataplane. An attacker with access to a Cilium agent pod can write to `/opt/cni/bin` due to a `hostPath` mount of that directory in the agent pod. By replacing the CNI binary with their own malicious binary and waiting for the creation of a new pod on the node, the attacker can gain access to the underlying node. Kubernetes RBAC should be used to deny users and service accounts `exec` access to Cilium agent pods. **Recommendations** For versions prior to 1.11.15, update to version 1.11.15 or later. For versions prior to 1.12.8, update to version 1.12.8 or later. For versions prior to 1.13.1, update to version 1.13.1 or later. As a temporary workaround, consider using Kubernetes RBAC to deny users and service accounts `exec` access to Cilium agent pods. In cases where a user requires `exec` access to Cilium agent pods, but should not have access to the underlying node, no workaround is possible.

**Name of the Vulnerable Software and Affected Versions** Cilium versions prior to 1.9.16 Cilium versions prior to 1.10.11 Cilium versions prior to 1.11.5 **Description** Cilium is open source software for providing and securing network connectivity and loadbalancing between application workloads. It contains an incorrect default permissions vulnerability, allowing operating systems with users belonging to the group ID 1000 to access the API of Cilium via Unix domain socket available on the host where Cilium is running. This could allow malicious users to compromise integrity as well as system availability on that host. **Recommendations** For versions prior to 1.9.16, update to version 1.9.16 or later. For versions prior to 1.10.11, update to version 1.10.11 or later. For versions prior to 1.11.5, update to version 1.11.5 or later. As a temporary workaround, modify Cilium's DaemonSet to run with a certain command, which can be found in the GitHub Security Advisory for this vulnerability. Prevent Cilium from running with group 1000 by modifying Cilium's DaemonSet to run with the following command: ``` containers: - name: cilium-agent args: - -c - "groupdel cilium && cilium-agent --config-dir=/tmp/cilium/config-map" command: - bash ```