THREATPORT/VULNERABILITY/CVE-2021-43858
HIGH SEVERITY

CVE-2021-43858

Minio vulnerability

CVSS
8.8
EPSS
35.5%
EPSS pct
98th
Exploited
No known
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 vendor
Minio
Affected product
Minio
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
  • CWE-269 — Improper Privilege Management
  • CWE-863 — Incorrect Authorization
Published
2021-12-27

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring low privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 35.5% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 98% of all scored CVEs.

Check your external exposure to CVE-2021-43858

  • Confirm whether Minio Minio is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2021-43858.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-43858

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