User privilege escalation in MinIO
CVE-2021-43858

8.8HIGH

Key Information:

Vendor

Minio

Status
Minio
Vendor
CVE Published:
27 December 2021

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 47%

What is CVE-2021-43858?

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 Version(s)

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

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

cve-2021-43858
Created by 0rx1

CVE-2021-43858-MinIO
Created by khuntor

References

https://github.com/minio/minio/security/advisories/GHSA-j...
x_refsource_CONFIRM
https://github.com/minio/minio/pull/13976
x_refsource_MISC
https://github.com/minio/minio/pull/7949
x_refsource_MISC

EPSS Score

47% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.