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CVE-2021-25741: Files or Directories Accessible to External Parties

September 20, 2021 (updated September 29, 2021)

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.

References

  • nvd.nist.gov/vuln/detail/CVE-2021-25741

Code Behaviors & Features

Detect and mitigate CVE-2021-25741 with GitLab Dependency Scanning

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Affected versions

All versions up to 1.19.14, all versions starting from 1.20.0 up to 1.20.10, all versions starting from 1.21.0 up to 1.21.4, all versions starting from 1.22.0 up to 1.22.1

Fixed versions

  • v1.22.2
  • v1.21.5
  • v1.20.11
  • v1.19.15

Solution

Upgrade to version 1.19.15, 1.20.11, 1.21.5, 1.22.2 or above.

Impact 8.1 HIGH

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

Learn more about CVSS

Source file

go/github.com/kubernetes/kubelet/CVE-2021-25741.yml

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