Exploit Report

Computer Security And Bug Information


CVE Title
Published Date2023-03-17T20:15Z
Modified Date2023-03-24T16:29Z
CWE TypeCWE-276
DescriptionCilium is a networking, observability, and security solution with an eBPF-based dataplane. Prior to versions 1.11.15, 1.12.8, and 1.13.1, 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. The issue has been fixed and the fix is available on versions 1.11.15, 1.12.8, and 1.13.1. Some workarounds are available. Kubernetes RBAC should be used 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.
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Reference URLhttps://github.com/cilium/cilium/releases/tag/v1.13.1
Reference DescriptionMISC https://github.com/cilium/cilium/releases/tag/v1.13.1
Reference URLhttps://github.com/cilium/cilium/pull/24075
Reference DescriptionMISC https://github.com/cilium/cilium/pull/24075
Reference URLhttps://github.com/cilium/cilium/releases/tag/v1.11.15
Reference DescriptionMISC https://github.com/cilium/cilium/releases/tag/v1.11.15
Reference URLhttps://kubernetes.io/docs/reference/access-authn-authz/rbac/
Reference DescriptionMISC https://kubernetes.io/docs/reference/access-authn-authz/rbac/
Reference URLhttps://github.com/cilium/cilium/releases/tag/v1.12.8
Reference DescriptionMISC https://github.com/cilium/cilium/releases/tag/v1.12.8
TagsThird Party Advisory

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