CVE-2020-28914

low-risk
Published 2020-11-17

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.

Do I need to act?

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0.05% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.1/10 High
LOCAL / LOW complexity

Affected Products (1)

Kata-Containers

Affected Vendors

Katacontainers

References (10)

Third Party Advisory https://github.com/kata-containers/kata-containers/pull/1062
Third Party Advisory https://github.com/kata-containers/runtime/pull/3042
Third Party Advisory https://github.com/kata-containers/runtime/pull/3051
Release Notes https://github.com/kata-containers/runtime/releases/tag/1.11.5
Release Notes https://github.com/kata-containers/runtime/releases/tag/1.12.0
Third Party Advisory https://github.com/kata-containers/kata-containers/pull/1062
Third Party Advisory https://github.com/kata-containers/runtime/pull/3042
Third Party Advisory https://github.com/kata-containers/runtime/pull/3051
Release Notes https://github.com/kata-containers/runtime/releases/tag/1.11.5
Release Notes https://github.com/kata-containers/runtime/releases/tag/1.12.0
27
/ 100
low-risk
Severity 22/34 · High
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal