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CVE-2021-34599— Improper Certificate Validation in CODESYS Git

Quick assessment

Affected
CODESYS CODESYS Git
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.

CODESYS是德国3S-Smart Software Solutions的一套控制器开发系统 CODESYS Git 存在信任管理问题漏洞，该漏洞源于受影响的CODESYS Git版本在V1.1.0.0之前的版本中缺少HTTPS握手中的证书验证。攻击者可利用该漏洞导致中间人攻击。

CVSS 7.4 · High EPSS 0.47% · P41
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I. Basic Information for CVE-2021-34599

Vulnerability Information
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Vulnerability Title
Improper Certificate Validation in CODESYS Git
Source: CVE Program / CVE List V5
Vulnerability Description
Affected versions of CODESYS Git in Versions prior to V1.1.0.0 lack certificate validation in HTTPS handshakes. CODESYS Git does not implement certificate validation by default, so it does not verify that the server provides a valid and trusted HTTPS certificate. Since the certificate of the server to which the connection is made is not properly verified, the server connection is vulnerable to a man-in-the-middle attack.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
CODESYS 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CODESYS是德国3S-Smart Software Solutions的一套控制器开发系统 CODESYS Git 存在信任管理问题漏洞，该漏洞源于受影响的CODESYS Git版本在V1.1.0.0之前的版本中缺少HTTPS握手中的证书验证。攻击者可利用该漏洞导致中间人攻击。
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
CODESYS CODESYS Git CODESYS Git ~ V1.1.0.0 -

II. Public POCs for CVE-2021-34599

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III. Intelligence Information for CVE-2021-34599

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Other References for CVE-2021-34599 (1)

IV. Related Vulnerabilities

Same vendor: CODESYS
Same weakness: CWE-295