CVE-2021-21362 Bypassing readOnly policy by creating a temporary 'mc share upload' URL

2021-03-0818:40:34

CWE-285

GitHub_M

www.cve.org

7.7 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

0.001 Low

EPSS

Percentile

43.3%

JSON

MinIO is an open-source high performance object storage service and it is API compatible with Amazon S3 cloud storage service. In MinIO before version RELEASE.2021-03-04T00-53-13Z it is possible to bypass a readOnly policy by creating a temporary ‘mc share upload’ URL. Everyone is impacted who uses MinIO multi-users. This is fixed in version RELEASE.2021-03-04T00-53-13Z. As a workaround, one can disable uploads with Content-Type: multipart/form-data as mentioned in the S3 API RESTObjectPOST docs by using a proxy in front of MinIO.

CNA Affected

[
  {
    "product": "minio",
    "vendor": "minio",
    "versions": [
      {
        "status": "affected",
        "version": "< RELEASE.2021-03-04T00-53-13Z"
      }
    ]
  }
]