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CVE-2021-20238

Quick assessment

Affected
n/a openshift/machine-config-operator
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Red Hat OpenShift Container Platform是美国红帽（Red Hat）公司的一套可帮助企业在物理、虚拟和公共云基础架构之间开发、部署和管理现有基于容器的应用程序的应用平台。 OpenShift Container Platform 4 存在访问控制错误漏洞，该漏洞源于 Machine Config Server 提供的 ignition config 无需身份验证即可从集群外部访问。

AI Predicted 6.1 Difficulty: Moderate EPSS 0.77% · P54

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2021-20238

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
It was found in OpenShift Container Platform 4 that ignition config, served by the Machine Config Server, can be accessed externally from clusters without authentication. The MCS endpoint (port 22623) provides ignition configuration used for bootstrapping Nodes and can include some sensitive data, e.g. registry pull secrets. There are two scenarios where this data can be accessed. The first is on Baremetal, OpenStack, Ovirt, Vsphere and KubeVirt deployments which do not have a separate internal API endpoint and allow access from outside the cluster to port 22623 from the standard OpenShift API Virtual IP address. The second is on cloud deployments when using unsupported network plugins, which do not create iptables rules that prevent to port 22623. In this scenario, the ignition config is exposed to all pods within the cluster and cannot be accessed externally.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Red Hat OpenShift Container Platform 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Red Hat OpenShift Container Platform是美国红帽（Red Hat）公司的一套可帮助企业在物理、虚拟和公共云基础架构之间开发、部署和管理现有基于容器的应用程序的应用平台。 OpenShift Container Platform 4 存在访问控制错误漏洞，该漏洞源于 Machine Config Server 提供的 ignition config 无需身份验证即可从集群外部访问。
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
- openshift/machine-config-operator affecting versions up to, including ose-machine-config-operator-container-v4.9.0 -

II. Public POCs for CVE-2021-20238

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III. Intelligence Information for CVE-2021-20238

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Vendor Advisories for CVE-2021-20238 (1)

Same Patch Batch · n/a · 2022-04-01 · 32 CVEs total

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CVE-2022-21235 8.1 HIGH Command Injection
CVE-2022-24440 8.1 HIGH Command Injection
CVE-2022-21223 8.1 HIGH Command Injection
CVE-2022-24066 8.1 HIGH Command Injection
CVE-2022-22950 Vmware Spring Framework 安全漏洞
CVE-2021-23247 quick game engine 命令注入漏洞
CVE-2021-32503 SICK FieldEcho 资源管理错误漏洞
CVE-2021-3461 Red Hat Keycloak代码问题漏洞
CVE-2021-20295 Red Hat Enterprise Linux 缓冲区错误漏洞
CVE-2021-27223 Kaspersky Anti-Virus安全漏洞
CVE-2022-27534 Kaspersky Anti-Virus 安全漏洞
CVE-2022-25155 Mitsubishi Electric MELSEC iQ-F series 授权问题漏洞
CVE-2022-25156 Mitsubishi Electric MELSEC iQ-F series 加密问题漏洞
CVE-2022-25157 Mitsubishi Electric MELSEC iQ-F series 授权问题漏洞
CVE-2022-25159 Mitsubishi Electric MELSEC iQ-F series 安全漏洞
CVE-2022-25158 Mitsubishi Electric MELSEC iQ-F series 安全漏洞
CVE-2022-25160 Mitsubishi Electric Factory Automation 安全漏洞
CVE-2022-22965 Spring Framework 代码注入漏洞
CVE-2021-3847 Linux kernel 安全漏洞

Showing top 20 of 32 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: openshift/machine-config-operator
Same vendor: n/a
Same weakness: CWE-287

V. Comments for CVE-2021-20238

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