Project: Confidential Containers (Provisioning / Security & Compliance)
File: v0.4.0.md

Release Date: 2023-03-03 Please see the for details on how to try out Confidential Containers. Please refer to our and pages for a definition of the acronyms used in this document. This release focused on reducing technical debt. You will not observe as many new features in this release but you will be running on top of more robust code. Skopeo and umoci dependencies are removed with our image-rs component fully integrated Improved CI for SEV Improved container support for enclave-cc / SGX Confidential Containers is tested with attestation on the following platforms: Intel TDX AMD SEV The following platforms are untested or partially supported: Intel SGX AMD SEV-ES IBM Secure Execution (SE) on IBM zSystems (s390x) running LinuxONE The following platforms are in development: AMD SEV-SNP The following are known limitations of this release: Platform support is currently limited, and rapidly changing AMD SEV-ES is not tested in the CI. Image signature validation has not been tested with AMD SEV. s390x does not support cosign signature validation SELinux is not supported on the host and must be set to permissive if in use. Attestation and key brokering support is still under development The disk-based key broker client (KBC) is used for non-tee testing, but is not suitable for production, except with encrypted VM images. Currently, there are two key broker services (KBS) that can be used: simple-kbs: simple key broker service for SEV(-ES). : An external project with which Attestation Agent can conduct remote attestation communication and key acquisition via EAA KBC The full-featured generic KBS and the corresponding KBC are still in the development stage. The format of encrypted container images is still subject to change The container image format itself may still change The tools to generate images are not in their final form The image format itself is subject to change in upcoming releases Image repository support for encrypted images is unequal CoCo currently requires a custom build of `containerd` The CoCo operator will deploy the correct version of `containerd` for you Changes are required to delegate `PullImage` to the agent in the virtual machine The required changes are not part of the vanilla `containerd` The final form of the required changes in `containerd` is expected to be different `crio` is not supported CoCo is not fully integrated with the orchestration ecosystem (Kubernetes, OpenShift) OpenShift is a non-starter at the moment due to its dependency on Existing APIs do not fully support the CoCo security and threat model. Some commands accessing confidential data, such as `kubectl exec`, may either fail to work, or incorrectly expose information to the host Container image sharing is not possible in this release Container images are downloaded by the guest (with encryption), not by the host As a result, the same image will be downloaded separately by every pod using it, not shared between pods on the same host. The CoCo community aspires to adopting open source security best practices, but not all practices are adopted yet. We track our status with the OpenSSF Best Practices Badge, which increased to 49% at the time of this release. The main gaps are in test coverage, both general and security tests. Vulnerability reporting mechanisms also need to be created. Public github issues are still appropriate for this release until private reporting is established. None