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CVE-2022-31804— CODESYS Gateway server prone to denial of service attack due to excessive memory allocation

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 存在安全漏洞，该漏洞源于不会验证请求的大小是否在预期限制内。未经身份验证的攻击者利用该漏洞可能会分配任意数量的内存，这可能导致网关因内存不足而崩溃。

CVSS 7.5 · High EPSS 1.14% · P65

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2022-31804

Vulnerability Information
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Vulnerability Title
CODESYS Gateway server prone to denial of service attack due to excessive memory allocation
Source: CVE Program / CVE List V5
Vulnerability Description
The CODESYS Gateway Server V2 does not verifiy that the size of a request is within expected limits. An unauthenticated attacker may allocate an arbitrary amount of memory, which may lead to a crash of the Gateway due to an out-of-memory condition.
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
未经控制的内存分配
Source: CVE Program / CVE List V5
Vulnerability Title
CODESYS Gateway Server安全漏洞
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 存在安全漏洞，该漏洞源于不会验证请求的大小是否在预期限制内。未经身份验证的攻击者利用该漏洞可能会分配任意数量的内存，这可能导致网关因内存不足而崩溃。
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 unspecified ~ V2.3.9.38 -

II. Public POCs for CVE-2022-31804

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III. Intelligence Information for CVE-2022-31804

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Other References for CVE-2022-31804 (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-2022-31805 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
CVE-2022-31803 5.3 MEDIUM CODESYS Gateway Server V2 prone to Denial of Service Attack

IV. Related Vulnerabilities

Same product: CODESYS Gateway Server V2
Same vendor: CODESYS
Same weakness: CWE-789

V. Comments for CVE-2022-31804

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