runAsNonRoot logic bypass for Windows containers
CVE-2021-25749

7.8HIGH

Key Information:

Vendor

Kubernetes
Status
Kubernetes
Vendor
CVE Published:
24 May 2023

What is CVE-2021-25749?

A security flaw exists in Windows Container workloads where the runAsNonRoot option can be bypassed, allowing workloads to operate with ContainerAdministrator privileges. This misconfiguration can lead to unauthorized access, facilitating manipulation of containerized applications without appropriate restrictions. Proper security measures should be implemented to safeguard against this vulnerability to maintain integrity and confidentiality within container environments.

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Deploy the Patch

Affected Version(s)

Kubernetes kubelet v1.22.0 - v1.22.13

Kubernetes kubelet v1.23.0 - v1.23.10

Kubernetes kubelet v1.24.0 - v1.24.4

References

https://groups.google.com/g/kubernetes-security-announce/...

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Mark Rosetti (@marosset) of Microsoft
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