CVE-2021-43858

User privilege escalation in MinIO

Description

MinIO is a Kubernetes native application for cloud storage. Prior to version `RELEASE.2021-12-27T07-23-18Z`, a malicious client can hand-craft an HTTP API call that allows for updating policy for a user and gaining higher privileges. The patch in version `RELEASE.2021-12-27T07-23-18Z` changes the accepted request body type and removes the ability to apply policy changes through this API. There is a workaround for this vulnerability: Changing passwords can be disabled by adding an explicit `Deny` rule to disable the API for users.

Categories

8.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 47.52% Top 5%
Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com
Affected: minio minio
Published at:
Updated at:

References

Link Tags
https://github.com/minio/minio/security/advisories/GHSA-j6jc-jqqc-p6cx third party advisory patch
https://github.com/minio/minio/pull/13976 third party advisory patch
https://github.com/minio/minio/pull/7949 third party advisory patch
https://github.com/minio/minio/commit/5a96cbbeaabd0a82b0fe881378e7c21c85091abf third party advisory patch
https://github.com/minio/minio/releases/tag/RELEASE.2021-12-27T07-23-18Z third party advisory release notes

Frequently Asked Questions

What is the severity of CVE-2021-43858?
CVE-2021-43858 has been scored as a high severity vulnerability.
How to fix CVE-2021-43858?
To fix CVE-2021-43858, 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-2021-43858 being actively exploited in the wild?
It is possible that CVE-2021-43858 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~48% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-43858?
CVE-2021-43858 affects minio minio.
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