CVE-2021-25741

Symlink Exchange Can Allow Host Filesystem Access

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.

Categories

8.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 27.84% Top 5%
Third-Party Advisory github.com Third-Party Advisory netapp.com
Affected: Kubernetes Kubernetes
Published at:
Updated at:

References

Link Tags
https://groups.google.com/g/kubernetes-security-announce/c/nyfdhK24H7s mailing list mitigation
https://github.com/kubernetes/kubernetes/issues/104980 third party advisory mitigation
https://security.netapp.com/advisory/ntap-20211008-0006/ third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-25741?
CVE-2021-25741 has been scored as a high severity vulnerability.
How to fix CVE-2021-25741?
To fix CVE-2021-25741, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-25741 being actively exploited in the wild?
It is possible that CVE-2021-25741 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~28% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-25741?
CVE-2021-25741 affects Kubernetes Kubernetes.
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