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CVE-2018-4850

Quick assessment

Affected
Siemens AG SIMATIC S7-400 (incl. F) CPU hardware version 4.0 and below, SIMATIC S7-400 (incl. F) CPU hardware version 5.0, SIMATIC S7-400H CPU hardware version 4.5 and below
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 SIMATIC S7-400和SIMATIC S7-400H都是德国西门子（Siemens）公司的用于制造和过程自动化领域的可编程逻辑控制器产品。 Siemens SIMATIC S7-400 (incl. F)和SIMATIC S7-400H CPU硬件中存在安全漏洞，该漏洞源于程序没有正确的验证S7通信数据包。攻击者可利用该漏洞造成拒绝服务。以下产品和版本受到影响：Siemens SIMATIC S7-400 4.0及之前版本，使用5.2之前版本固件的SIMATIC S7-400 (i

AI Predicted 7.5 Difficulty: Easy EPSS 2.42% · P84
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I. Basic Information for CVE-2018-4850

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 S7-400 (incl. F) CPU hardware version 4.0 and below (All versions), SIMATIC S7-400 (incl. F) CPU hardware version 5.0 (All firmware versions < V5.2), SIMATIC S7-400H CPU hardware version 4.5 and below (All versions). The affected CPUs improperly validate S7 communication packets which could cause a Denial-of-Service condition of the CPU. The CPU will remain in DEFECT mode until manual restart.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Siemens SIMATIC S7-400和SIMATIC S7-400H 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Siemens SIMATIC S7-400和SIMATIC S7-400H都是德国西门子（Siemens）公司的用于制造和过程自动化领域的可编程逻辑控制器产品。 Siemens SIMATIC S7-400 (incl. F)和SIMATIC S7-400H CPU硬件中存在安全漏洞，该漏洞源于程序没有正确的验证S7通信数据包。攻击者可利用该漏洞造成拒绝服务。以下产品和版本受到影响：Siemens SIMATIC S7-400 4.0及之前版本，使用5.2之前版本固件的SIMATIC S7-400 (i
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 AG SIMATIC S7-400 (incl. F) CPU hardware version 4.0 and below, SIMATIC S7-400 (incl. F) CPU hardware version 5.0, SIMATIC S7-400H CPU hardware version 4.5 and below SIMATIC S7-400 (incl. F) CPU hardware version 4.0 and below : All versions -

II. Public POCs for CVE-2018-4850

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III. Intelligence Information for CVE-2018-4850

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Vendor Advisories for CVE-2018-4850 (2)

IV. Related Vulnerabilities

Same vendor: Siemens AG
Same weakness: CWE-20

V. Comments for CVE-2018-4850

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