High severity · published Dec 27, 2021
CVE-2021-43858
User privilege escalation in MinIO
8.8
CVSS
35.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)35.5% · higher than 98% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MI
minio · minio
< RELEASE.2021-12-27T07-23-18Z · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-43858
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-43858
Patch
https://github.com/minio/minio/commit/5a96cbbeaabd0a82b0fe881378e7c21c85091abf
Patch
https://github.com/minio/minio/pull/13976
Patch
https://github.com/minio/minio/pull/7949
Release Notes
https://github.com/minio/minio/releases/tag/RELEASE.2021-12-27T07-23-18Z
Patch
https://github.com/minio/minio/security/advisories/GHSA-j6jc-jqqc-p6cx
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