CVE-2020-8555— Kubernetes kube-controller-manager SSRF
Quick assessment
Affected
Kubernetes Kubernetes
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.
Kubernetes（K8s）是云原生计算基金会（Cloud Native Computing Foundation）的一个开源系统，用于自动部署、扩展和管理容器化应用程序。 Kubernetes中的kube-controller-manager存在代码问题漏洞。攻击者可利用该漏洞从未受保护的端点上获取任意内容（500字节）。以下产品及版本受到影响：kube-controller-manager v1.15.12之前版本，v1.16.9之前版本，v1.17.5之前版本，v1.18.0之前版本。
Possible ATT&CK Techniques 1 AI
T1071.001 · Web Protocols
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I. Basic Information for CVE-2020-8555
Vulnerability Information
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Vulnerability Title
Kubernetes kube-controller-manager SSRF
Source: CVE Program / CVE List V5
Vulnerability Description
The Kubernetes kube-controller-manager in versions v1.0-1.14, versions prior to v1.15.12, v1.16.9, v1.17.5, and version v1.18.0 are vulnerable to a Server Side Request Forgery (SSRF) that allows certain authorized users to leak up to 500 bytes of arbitrary information from unprotected endpoints within the master's host network (such as link-local or loopback services).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
Kubernetes 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Kubernetes（K8s）是云原生计算基金会（Cloud Native Computing Foundation）的一个开源系统，用于自动部署、扩展和管理容器化应用程序。 Kubernetes中的kube-controller-manager存在代码问题漏洞。攻击者可利用该漏洞从未受保护的端点上获取任意内容（500字节）。以下产品及版本受到影响：kube-controller-manager v1.15.12之前版本，v1.16.9之前版本，v1.17.5之前版本，v1.18.0之前版本。
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 |
|---|---|---|---|---|
| Kubernetes | Kubernetes | 1.18.0 | - |
|
II. Public POCs for CVE-2020-8555
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2020-8555 (1)
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https://security.netapp.com/advisory/ntap-20200724-0005/ x_refsource_CONFIRM
Mailing List Discussions for CVE-2020-8555 (2)
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https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3SOCLOPTSYABTE4CLTSPDIFE6ZZZR4LX/ vendor-advisory x_refsource_FEDORA
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Other References for CVE-2020-8555 (2)
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https://groups.google.com/d/topic/kubernetes-security-announce/kEK27tqqs30/discussion mailing-list x_refsource_MLIST
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https://github.com/kubernetes/kubernetes/issues/91542 x_refsource_CONFIRM
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-
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V. Comments for CVE-2020-8555
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