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CVE-2021-33737

Quick assessment

Affected
Siemens SIMATIC CP 343-1 (incl. SIPLUS variants)
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 SIAMTIC CP343-1是德国西门子（Siemens）公司的一款通信模块。 Siemens SIAMTIC CP343-1存在缓冲区错误漏洞，该漏洞源于将特制数据包发送到受影响设备的端口 102/tcp 可能会导致拒绝服务情况。需要重新启动才能恢复正常操作。以下产品及版本受到影响：SIMATIC CP 343-1 (incl. SIPLUS variants) (All versions), SIMATIC CP 343-1 Advanced (incl. SIPLUS varian

CVSS 7.5 · High EPSS 1.06% · P63

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-33737

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability has been identified in SIMATIC CP 343-1 (incl. SIPLUS variants) (All versions), SIMATIC CP 343-1 Advanced (incl. SIPLUS variants) (All versions), SIMATIC CP 343-1 ERPC (All versions), SIMATIC CP 343-1 Lean (incl. SIPLUS variants) (All versions), SIMATIC CP 443-1 (All versions < V3.3), SIMATIC CP 443-1 (All versions < V3.3), SIMATIC CP 443-1 Advanced (All versions < V3.3), SIPLUS NET CP 443-1 (All versions < V3.3), SIPLUS NET CP 443-1 Advanced (All versions < V3.3). Sending a specially crafted packet to port 102/tcp of an affected device could cause a denial of service condition. A restart is needed to restore normal operations.
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
内存缓冲区边界内操作的限制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Siemens SIAMTIC CP343-1 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Siemens SIAMTIC CP343-1是德国西门子（Siemens）公司的一款通信模块。 Siemens SIAMTIC CP343-1存在缓冲区错误漏洞，该漏洞源于将特制数据包发送到受影响设备的端口 102/tcp 可能会导致拒绝服务情况。需要重新启动才能恢复正常操作。以下产品及版本受到影响：SIMATIC CP 343-1 (incl. SIPLUS variants) (All versions), SIMATIC CP 343-1 Advanced (incl. SIPLUS varian
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 SIMATIC CP 343-1 (incl. SIPLUS variants) All versions -
Siemens SIMATIC CP 343-1 Advanced (incl. SIPLUS variants) All versions -
Siemens SIMATIC CP 343-1 ERPC All versions -
Siemens SIMATIC CP 343-1 Lean (incl. SIPLUS variants) All versions -
Siemens SIMATIC CP 443-1 All versions < V3.3 -
Siemens SIMATIC CP 443-1 All versions < V3.3 -
Siemens SIMATIC CP 443-1 Advanced All versions < V3.3 -
Siemens SIPLUS NET CP 443-1 All versions < V3.3 -
Siemens SIPLUS NET CP 443-1 Advanced All versions < V3.3 -

II. Public POCs for CVE-2021-33737

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III. Intelligence Information for CVE-2021-33737

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Vendor Advisories for CVE-2021-33737 (1)

Same Patch Batch · Siemens · 2021-09-14 · 30 CVEs total

CVE-2021-37184 Siemens Industrial Edge Management 授权问题漏洞
CVE-2019-10941 SINEMA Server 访问控制错误漏洞
CVE-2021-25665 Simcenter STAR-CCM+ Viewer 缓冲区错误漏洞
CVE-2021-31891 Siemens Desigo CC 操作系统命令注入漏洞
CVE-2021-27391 Siemens APOGEE MBC 缓冲区错误漏洞
CVE-2021-33716 Siemens SIMATIC CP 1543-1和SIMATIC CP 1545-1 安全漏洞
CVE-2021-33719 Siemens SIPROTEC 5 代码注入漏洞
CVE-2021-33720 Siemens SIPROTEC 5 代码注入漏洞
CVE-2021-37173 Siemens RUGGEDCOM 信息泄露漏洞
CVE-2021-37174 Siemens RUGGEDCOM 授权问题漏洞
CVE-2021-37175 Siemens RUGGEDCOM 授权问题漏洞
CVE-2021-37176 Siemens Simcenter Femap 缓冲区错误漏洞
CVE-2021-37177 Siemens SINEMA Remote Connect Server 访问控制错误漏洞
CVE-2021-37181 多款 Siemens 产品代码问题漏洞
CVE-2021-37183 Siemens SINEMA Remote Connect Server 访问控制错误漏洞
CVE-2021-40357 Siemens Teamcenter Active Workspace 路径遍历漏洞
CVE-2021-37186 Siemens SIMATIC 安全特征问题漏洞
CVE-2021-37191 Siemens SINEMA Remote Connect Server 安全漏洞
CVE-2021-37190 Siemens SINEMA Remote Connect Server 信息泄露漏洞
CVE-2021-37192 Siemens SINEMA Remote Connect Server 信息泄露漏洞

Showing top 20 of 30 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same vendor: Siemens
Same weakness: CWE-119

V. Comments for CVE-2021-33737

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