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CVE-2024-43803— Bare Metal Operator 安全漏洞

一分钟漏洞结论

影响对象
metal3-io baremetal-operator
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。

Bare Metal Operator是Metal³开源的一个应用程序，用Kubernetes API来管理裸机主机。 Bare Metal Operator 0.8.0版本、0.6.2版本和0.5.2之前版本存在安全漏洞，该漏洞源于不当的跨命名空间的密钥访问控制，可能允许拥有创建或编辑BareMetalHost权限的用户从其他命名空间泄露密钥信息。

CVSS 4.9 · Medium EPSS 0.57% · P46

可能的 ATT&CK 技术 1 AI

T1530 · Data from Cloud Storage
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一、 漏洞 CVE-2024-43803 基础信息

漏洞信息
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Vulnerability Title
BMO can expose particularly named secrets from other namespaces via BMH CRD
来源: CVE Program / CVE List V5
Vulnerability Description
The Bare Metal Operator (BMO) implements a Kubernetes API for managing bare metal hosts in Metal3. The `BareMetalHost` (BMH) CRD allows the `userData`, `metaData`, and `networkData` for the provisioned host to be specified as links to Kubernetes Secrets. There are fields for both the `Name` and `Namespace` of the Secret, meaning that versions of the baremetal-operator prior to 0.8.0, 0.6.2, and 0.5.2 will read a `Secret` from any namespace. A user with access to create or edit a `BareMetalHost` can thus exfiltrate a `Secret` from another namespace by using it as e.g. the `userData` for provisioning some host (note that this need not be a real host, it could be a VM somewhere). BMO will only read a key with the name `value` (or `userData`, `metaData`, or `networkData`), so that limits the exposure somewhat. `value` is probably a pretty common key though. Secrets used by _other_ `BareMetalHost`s in different namespaces are always vulnerable. It is probably relatively unusual for anyone other than cluster administrators to have RBAC access to create/edit a `BareMetalHost`. This vulnerability is only meaningful, if the cluster has users other than administrators and users' privileges are limited to their respective namespaces. The patch prevents BMO from accepting links to Secrets from other namespaces as BMH input. Any BMH configuration is only read from the same namespace only. The problem is patched in BMO releases v0.7.0, v0.6.2 and v0.5.2 and users should upgrade to those versions. Prior upgrading, duplicate the BMC Secrets to the namespace where the corresponding BMH is. After upgrade, remove the old Secrets. As a workaround, an operator can configure BMO RBAC to be namespace scoped for Secrets, instead of cluster scoped, to prevent BMO from accessing Secrets from other namespaces.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
信息暴露
来源: CVE Program / CVE List V5
Vulnerability Title
Bare Metal Operator 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Bare Metal Operator是Metal³开源的一个应用程序，用Kubernetes API来管理裸机主机。 Bare Metal Operator 0.8.0版本、0.6.2版本和0.5.2之前版本存在安全漏洞，该漏洞源于不当的跨命名空间的密钥访问控制，可能允许拥有创建或编辑BareMetalHost权限的用户从其他命名空间泄露密钥信息。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD

受影响产品

厂商 产品 影响版本 CPE 订阅
metal3-io baremetal-operator >= 0.7.0, < 0.8.0 -

二、漏洞 CVE-2024-43803 的公开POC

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三、漏洞 CVE-2024-43803 的情报信息

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CVE-2024-43803 补丁与修复 (3)

CVE-2024-43803 厂商安全公告 (1)

IV. Related Vulnerabilities

Same product: baremetal-operator
Same vendor: metal3-io
Same weakness: CWE-200

V. Comments for CVE-2024-43803

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