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CVE-2020-8867

Quick assessment

Affected
OPC Foundation UA .NET Standard
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.

OPC Foundation UA.NET Standard是OPC基金会（OPC Foundation）的一套用于开发OPC UA应用程序的统一架构标准。 OPC Foundation UA.NET Standard中会话的处理过程存在安全漏洞，该漏洞源于在对对象执行操作时缺少适当的锁定操作。攻击者可利用该漏洞导致拒绝服务。

AI Predicted 7.5 Difficulty: Easy EPSS 2.64% · P85

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2020-8867

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of OPC Foundation UA .NET Standard 1.04.358.30. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of sessions. The issue results from the lack of proper locking when performing operations on an object. An attacker can leverage this vulnerability to create a denial-of-service condition against the application. Was ZDI-CAN-10295.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
Source: CVE Program / CVE List V5
Vulnerability Title
OPC Foundation UA .NET Standard 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OPC Foundation UA.NET Standard是OPC基金会（OPC Foundation）的一套用于开发OPC UA应用程序的统一架构标准。 OPC Foundation UA.NET Standard中会话的处理过程存在安全漏洞，该漏洞源于在对对象执行操作时缺少适当的锁定操作。攻击者可利用该漏洞导致拒绝服务。
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
OPC Foundation UA .NET Standard 1.04.358.30 -

II. Public POCs for CVE-2020-8867

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III. Intelligence Information for CVE-2020-8867

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Vendor Advisories for CVE-2020-8867 (1)

Other References for CVE-2020-8867 (1)

IV. Related Vulnerabilities

Same product: UA .NET Standard
Same vendor: OPC Foundation
Same weakness: CWE-367

V. Comments for CVE-2020-8867

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