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CVE-2021-43858— User privilege escalation in MinIO

Quick assessment

Affected
minio minio
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Minio MinIO是美国MinIO（Minio）公司的一款开源的对象存储服务器。该产品支持构建用于机器学习、分析和应用程序数据工作负载的基础架构。 MinIO 存在安全漏洞，该漏洞源于。MinIO是Kubernetes云存储的本地应用程序。版本发布之前。，恶意客户端可以手工创建一个HTTP API调用，允许更新用户的策略并获得更高的权限。版本号为RELEASE的补丁。更改已接受的请求体类型，并删除通过此API应用策略更改的能力。对于这个漏洞有一个解决方案:可以通过添加一个显式的“Deny”规则来禁用用

CVSS 8.8 · High EPSS 35.46% · P98
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I. Basic Information for CVE-2021-43858

Vulnerability Information
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Vulnerability Title
User privilege escalation in MinIO
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Minio MinIO 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Minio MinIO是美国MinIO（Minio）公司的一款开源的对象存储服务器。该产品支持构建用于机器学习、分析和应用程序数据工作负载的基础架构。 MinIO 存在安全漏洞，该漏洞源于。MinIO是Kubernetes云存储的本地应用程序。版本发布之前。，恶意客户端可以手工创建一个HTTP API调用，允许更新用户的策略并获得更高的权限。版本号为RELEASE的补丁。更改已接受的请求体类型，并删除通过此API应用策略更改的能力。对于这个漏洞有一个解决方案:可以通过添加一个显式的“Deny”规则来禁用用
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

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

II. Public POCs for CVE-2021-43858

# POC Description Source Link Shenlong Link
1 None https://github.com/0rx1/cve-2021-43858 POC Details
2 None https://github.com/khuntor/CVE-2021-43858-MinIO POC Details
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III. Intelligence Information for CVE-2021-43858

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Patches & Fixes for CVE-2021-43858 (3)

Vendor Advisories for CVE-2021-43858 (1)

Other References for CVE-2021-43858 (1)

IV. Related Vulnerabilities

Same product: minio
Same vendor: minio
Same weakness: CWE-269

V. Comments for CVE-2021-43858

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