Vulnerability · Published Dec 27, 2021 · Assigned by GitHub_M

CVE-2021-43858User privilege escalation in MinIO

High 8.8

In plain English

A high-severity privilege mismanagement in minio from minio. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 35.5% (higher than 98% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)35.5%top 1.5% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack tooling1Public PoC

Official 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.

Affected products (as reported)

Vendor	Product	Versions
minio	minio	< RELEASE.2021-12-27T07-23-18Z

Weakness: CWE-269 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

https://github.com/minio/minio/security/advisories/GHSA-j6jc-jqqc-p6cx x_refsource_CONFIRM
https://github.com/minio/minio/pull/13976 x_refsource_MISC
https://github.com/minio/minio/pull/7949 x_refsource_MISC
https://github.com/minio/minio/commit/5a96cbbeaabd0a82b0fe881378e7c21c85091abf x_refsource_MISC
https://github.com/minio/minio/releases/tag/RELEASE.2021-12-27T07-23-18Z x_refsource_MISC