CVE-2020-28914 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Reference

https://github.com/kata-containers/runtime/pull/3042 https://github.com/kata-containers/kata-containers/pull/1062 https://github.com/kata-containers/runtime/pull/3051 https://github.com/kata-containers/runtime/releases/tag/1.11.5 https://github.com/kata-containers/runtime/releases/tag/1.12.0

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.1