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I. Basic Information for CVE-2021-31889
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions < V2303), PLUSCONTROL 1st Gen (All versions), SIMOTICS CONNECT 400 (All versions < V0.5.0.0). Malformed TCP packets with a corrupted SACK option leads to Information Leaks and Denial-of-Service conditions. (FSMD-2021-0015)
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
整数下溢(超界折返)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Siemens Nucleus 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Siemens Nucleus是德国西门子（Siemens）公司的一个工控设备。提供一个工控设备。 Siemens Nucleus RTOS TCP/IP Stack 存在数字错误漏洞，该漏洞源于带有损坏的 SACK 选项的畸形 TCP 数据包会导致信息泄漏和拒绝服务条件。
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
SiemensCapital Embedded AR Classic 431-422 0 ~ * -
SiemensCapital Embedded AR Classic R20-11 0 ~ V2303 -
SiemensPLUSCONTROL 1st Gen All versions -
SiemensSIMOTICS CONNECT 400 All versions < V0.5.0.0 -
II. Public POCs for CVE-2021-31889
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III. Intelligence Information for CVE-2021-31889
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IV. Related Vulnerabilities
Same product: Capital Embedded AR Classic 431-422
Same vendor: Siemens
Same weakness: CWE-191
V. Comments for CVE-2021-31889

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