CVE-2020-5423— Cloud Controller is vulnerable to denial of service via YAML parsing
Quick assessment
Affected
Cloud Foundry CAPI
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.
Cloud Foundry Cloud Controller是Cloud Foundry基金会的一个用于在Cloud Foundry架构中负责与用户交互的组件。该组件负责管理app的整个生命周期，用户可通过命令行与Cloud Server 交互。 CAPI (Cloud Controller) 1.101.0 之前版本存在安全漏洞，该漏洞源于容易受到拒绝服务攻击，在拒绝服务攻击中，未经身份验证的恶意攻击者可利用该漏洞可以将特别制作的YAML文件发送到某些端点，从而导致YAML解析器消耗过多的CPU和RAM
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2020-5423
Vulnerability Information
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Vulnerability Title
Cloud Controller is vulnerable to denial of service via YAML parsing
Source: CVE Program / CVE List V5
Vulnerability Description
CAPI (Cloud Controller) versions prior to 1.101.0 are vulnerable to a denial-of-service attack in which an unauthenticated malicious attacker can send specially-crafted YAML files to certain endpoints, causing the YAML parser to consume excessive CPU and RAM.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
Cloud Foundry Cloud Controller 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cloud Foundry Cloud Controller是Cloud Foundry基金会的一个用于在Cloud Foundry架构中负责与用户交互的组件。该组件负责管理app的整个生命周期，用户可通过命令行与Cloud Server 交互。 CAPI (Cloud Controller) 1.101.0 之前版本存在安全漏洞，该漏洞源于容易受到拒绝服务攻击，在拒绝服务攻击中，未经身份验证的恶意攻击者可利用该漏洞可以将特别制作的YAML文件发送到某些端点，从而导致YAML解析器消耗过多的CPU和RAM
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 |
|---|---|---|---|---|
| Cloud Foundry | CAPI | All ~ 1.101.0 | - |
|
| Cloud Foundry | CF Deployment | All ~ 15.0.0 | - |
|
II. Public POCs for CVE-2020-5423
| # | POC Description | Source Link | Shenlong Link |
|---|
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Security Blog Posts for CVE-2020-5423 (1)
-
https://www.cloudfoundry.org/blog/cve-2020-5423 x_refsource_CONFIRM
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V. Comments for CVE-2020-5423
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