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CVE-2021-31889

Quick assessment

Affected
Siemens Capital Embedded AR Classic 431-422
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.

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。

CVSS 7.5 · High EPSS 2.17% · P82

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2021-31889

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数下溢(超界折返)
Source: CVE Program / CVE List V5
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

Vendor Product Affected Versions CPE Subscribe
Siemens Capital Embedded AR Classic 431-422 0 ~ * -
Siemens Capital Embedded AR Classic R20-11 0 ~ V2303 -
Siemens PLUSCONTROL 1st Gen All versions -
Siemens SIMOTICS 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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Vendor Advisories for CVE-2021-31889 (10)

Same Patch Batch · Siemens · 2021-11-09 · 25 CVEs total

CVE-2021-40358 9.9 CRITICAL Siemens SIMATIC PCS 7和SIMATIC WinCC 路径遍历漏洞
CVE-2021-31346 8.2 HIGH Siemens Nucleus 安全漏洞
CVE-2021-40359 7.7 HIGH Siemens SIMATIC PCS 7和SIMATIC WinCC 路径遍历漏洞
CVE-2021-31345 7.5 HIGH Siemens Nucleus 安全漏洞
CVE-2021-31890 7.5 HIGH Siemens Nucleus ReadyStart 安全漏洞
CVE-2021-31881 7.1 HIGH Siemens Nucleus ReadyStart 缓冲区错误漏洞
CVE-2021-31883 7.1 HIGH Siemens Nucleus ReadyStart 缓冲区错误漏洞
CVE-2021-31882 6.5 MEDIUM Siemens Nucleus 缓冲区错误漏洞
CVE-2021-40364 5.5 MEDIUM Siemens SIMATIC PCS 7和SIMATIC WinCC 日志信息泄露漏洞
CVE-2021-31344 5.3 MEDIUM Siemens Nucleus ReadyStart 安全漏洞
CVE-2021-31886 Siemens Nucleus ReadyStart 缓冲区错误漏洞
CVE-2020-10052 SIMATIC RTLS 日志信息泄露漏洞
CVE-2020-10053 SIMATIC RTLS 安全漏洞
CVE-2020-10054 SIMATIC RTLS 输入验证错误漏洞
CVE-2021-31884 Siemens Nucleus ReadyStart 安全漏洞
CVE-2021-31885 Siemens Nucleus ReadyStart 安全漏洞
CVE-2021-42026 Siemens Mendix 安全漏洞
CVE-2021-31888 Siemens Nucleus ReadyStart 缓冲区错误漏洞
CVE-2021-31887 Siemens Nucleus ReadyStart 缓冲区错误漏洞
CVE-2021-37207 Siemens Sentron Powermanager 安全漏洞

Showing top 20 of 25 CVEs. View all on vendor page &rarr; →

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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