CVE-2021-25741

Symlink Exchange Can Allow Host Filesystem Access

State: Published
Severity: 8.8 High
Published: Sep 20, 2021
Updated: Sep 16, 2024
Reserved: Jan 21, 2021

Description

A security issue was discovered in Kubernetes where a user may be able to create a container with subpath volume mounts to access files & directories outside of the volume, including on the host filesystem.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	kubernetes

Weaknesses

CWE-20 Improper Input Validation

Affected Products

Product	Versions
KubernetesKubernetes	1.19.14 and earlierAffected 1.20.10 and earlierAffected 1.21.4 and earlierAffected 1.22.1 and earlierAffected

References

https://groups.google.com/g/kubernetes-security-announce/c/nyfdhK24H7s
https://github.com/kubernetes/kubernetes/issues/104980
https://security.netapp.com/advisory/ntap-20211008-0006/

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