An improper file permissions vulnerability affects Kata Containers prior to 1.11.5. When using a Kubernetes hostPath volume and mounting either a file or directory into a container as readonly, the file/directory is mounted as readOnly inside the container, but is still writable inside the guest. For a container breakout situation, a malicious guest can potentially modify or delete files/directories expected to be read-only.

References

• https://nvd.nist.gov/vuln/detail/CVE-2020-28914
• kata-containers/kata-containers#1062
• kata-containers/runtime#3042
• kata-containers/runtime#3051
• https://github.com/kata-containers/runtime/releases/tag/1.11.5
• https://github.com/kata-containers/runtime/releases/tag/1.12.0