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CVE-2019-7593— Metasys use of shared RSA key pairs

Quick assessment

Affected
Johnson Controls Metasys versions prior to 9.0
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.

Johnson Controls Metasys system是美国江森自控（Johnson Controls）公司的一套楼宇自动化系统。 Johnson Controls Metasys system 9.0之前版本中存在信任管理问题漏洞，该漏洞源于Metasys ADS/ADX服务器和NAE/NIE/NCE引擎使用共享的RSA密钥对来进行加密操作。攻击者可借助共享的RSA密钥对利用该漏洞解密Metasys ADS/ADX服务器或NAE/NIE/NCE引擎与之相连的SMP用户客户端之间捕获到的网络流量。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.82% · P56

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle
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I. Basic Information for CVE-2019-7593

Vulnerability Information
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Vulnerability Title
Metasys use of shared RSA key pairs
Source: CVE Program / CVE List V5
Vulnerability Description
Metasys® ADS/ADX servers and NAE/NIE/NCE engines prior to 9.0 make use of a shared RSA key pair for certain encryption operations involving the Site Management Portal (SMP).
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
在加密中重用Nonce与密钥对
Source: CVE Program / CVE List V5
Vulnerability Title
Johnson Controls Metasys system 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Johnson Controls Metasys system是美国江森自控（Johnson Controls）公司的一套楼宇自动化系统。 Johnson Controls Metasys system 9.0之前版本中存在信任管理问题漏洞，该漏洞源于Metasys ADS/ADX服务器和NAE/NIE/NCE引擎使用共享的RSA密钥对来进行加密操作。攻击者可借助共享的RSA密钥对利用该漏洞解密Metasys ADS/ADX服务器或NAE/NIE/NCE引擎与之相连的SMP用户客户端之间捕获到的网络流量。
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
Johnson Controls Metasys versions prior to 9.0 9.0 -

II. Public POCs for CVE-2019-7593

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III. Intelligence Information for CVE-2019-7593

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Other References for CVE-2019-7593 (1)

IV. Related Vulnerabilities

Same product: Metasys versions prior to 9.0
Same vendor: Johnson Controls
Same weakness: CWE-323

V. Comments for CVE-2019-7593

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