Vulnerability · Published Apr 22, 2020 · Assigned by zdi
CVE-2020-8867
Medium 5.3
In plain English
A medium-severity security flaw in UA .NET Standard from OPC Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.6% (higher than 86% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| NuGet | opcfoundation.netstandard.opc.ua | 1.4.359.31 | GHSA-9q94-v7ch-mxqw |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| OPC Foundation | UA .NET Standard | 1.04.358.30 |
Weakness: CWE-367 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L