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CVE-2022-31803— CODESYS Gateway Server V2 prone to Denial of Service Attack

Quick assessment

Affected
CODESYS CODESYS Gateway Server V2
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 Gateway Server是CODESYS 公司的一个扩展的 CODESYS 网关，将 CODESYS 自动化服务器连接到本地网络中的 CODESYS PLC。 CODESYS Gateway Server V2 存在资源管理错误漏洞，该漏洞源于对 TCP 客户端连接活动的检查不足。未经身份验证的攻击者利用该漏洞可使用所有可用的 TCP 连接，并阻止合法用户或客户端与 CODESYS 网关服务器 V2 建立新连接。

CVSS 5.3 · Medium EPSS 1.14% · P65
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I. Basic Information for CVE-2022-31803

Vulnerability Information
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Vulnerability Title
CODESYS Gateway Server V2 prone to Denial of Service Attack
Source: CVE Program / CVE List V5
Vulnerability Description
In CODESYS Gateway Server V2 an insufficient check for the activity of TCP client connections allows an unauthenticated attacker to consume all available TCP connections and prevent legitimate users or clients from establishing a new connection to the CODESYS Gateway Server V2. Existing connections are not affected and therefore remain intact.
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:L
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
CODESYS Gateway Server 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CODESYS Gateway Server是CODESYS 公司的一个扩展的 CODESYS 网关，将 CODESYS 自动化服务器连接到本地网络中的 CODESYS PLC。 CODESYS Gateway Server V2 存在资源管理错误漏洞，该漏洞源于对 TCP 客户端连接活动的检查不足。未经身份验证的攻击者利用该漏洞可使用所有可用的 TCP 连接，并阻止合法用户或客户端与 CODESYS 网关服务器 V2 建立新连接。
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 Gateway Server V2 V2 ~ V2.3.9.38 -

II. Public POCs for CVE-2022-31803

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III. Intelligence Information for CVE-2022-31803

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Other References for CVE-2022-31803 (1)

Same Patch Batch · CODESYS · 2022-06-24 · 14 CVEs total

CVE-2022-31802 9.8 CRITICAL Partial string comparison in CODESYS gateway server
CVE-2022-31806 9.8 CRITICAL Insecure default settings in CODESYS Runtime Toolkit 32 bit full and CODESYS PLCWinNT
CVE-2022-32137 8.8 HIGH CODESYS Runtime System prone to heap based buffer overflow
CVE-2022-32138 8.8 HIGH CODESYS runtime system prone to denial of service due to Unexpected Sign Extension
CVE-2022-32143 8.8 HIGH CODESYS runtime system prone to directory acces
CVE-2022-1965 8.1 HIGH CODESYS runtime system prone to file deletion due to improper error handling
CVE-2022-32142 8.1 HIGH CODESYS runtime system prone to denial of service due to use of out of range pointer
CVE-2022-31804 7.5 HIGH CODESYS Gateway server prone to denial of service attack due to excessive memory allocatio
CVE-2022-31805 7.5 HIGH Insecure transmission of credentials
CVE-2022-32136 6.5 MEDIUM Codesys runtime systems: Access of uninitialised pointer lead to denial of service.
CVE-2022-32139 6.5 MEDIUM CODESYS runtime system prone to denial of service due to out of bounds read
CVE-2022-32140 6.5 MEDIUM CODESYS runtime system prone to denial of service due to buffer copy
CVE-2022-32141 6.5 MEDIUM CODESYS runtime system prone to denial of service due to buffer over read

IV. Related Vulnerabilities

Same product: CODESYS Gateway Server V2
Same vendor: CODESYS
Same weakness: CWE-400

V. Comments for CVE-2022-31803

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