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I. Basic Information for CVE-2021-37186
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability has been identified in LOGO! CMR2020 (All versions < V2.2), LOGO! CMR2040 (All versions < V2.2), SIMATIC RTU3010C (All versions < V4.0.9), SIMATIC RTU3030C (All versions < V4.0.9), SIMATIC RTU3031C (All versions < V4.0.9), SIMATIC RTU3041C (All versions < V4.0.9). The underlying TCP/IP stack does not properly calculate the random numbers used as ISN (Initial Sequence Numbers). An adjacent attacker with network access to the LAN interface could interfere with traffic, spoof the connection and gain access to sensitive information.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
使用不充分的随机数
Source: NVD (National Vulnerability Database)
Vulnerability Title
Siemens SIMATIC 安全特征问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Siemens SIMATIC是西门子（Siemens）的一款组态软件。 Siemens SIMATIC RTU 3000 family中存在安全特征问题漏洞，该漏洞源于产品底层TCP IP堆栈没有正确地计算用作ISN(初始序列号)的随机数。攻击者可通过网络访问局域网接口的相邻攻击者可利用该漏洞可以干扰流量，欺骗连接并获得对敏感信息的访问权。
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
VendorProductAffected VersionsCPESubscribe
SiemensLOGO! CMR2020 All versions < V2.2 -
SiemensLOGO! CMR2040 All versions < V2.2 -
SiemensSIMATIC RTU3010C All versions < V4.0.9 -
SiemensSIMATIC RTU3030C All versions < V4.0.9 -
SiemensSIMATIC RTU3031C All versions < V4.0.9 -
SiemensSIMATIC RTU3041C All versions < V4.0.9 -
II. Public POCs for CVE-2021-37186
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III. Intelligence Information for CVE-2021-37186
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IV. Related Vulnerabilities
Same vendor: Siemens
Same weakness: CWE-330
V. Comments for CVE-2021-37186

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