CVE-2022-29863: Memory Allocation with Excessive Size Value in OPCFoundation.NetStandard.Opc.Ua.Core
Summary
CVE-2022-29863: Memory Allocation with Excessive Size Value in OPCFoundation.NetStandard.Opc.Ua.Core. Affects OPCFoundation.NetStandard.Opc.Ua.Core versions < 1.4.368.58. Fixed in 1.4.368.58. How to fix ↓
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Background
OPCFoundation.NetStandard.Opc.Ua.Core is a NuGet package that provides the OPC UA .NET Standard Stack. This package enables developers to implement OPC UA client and server applications in .NET. OPC UA (Open Platform Communications Unified Architecture) is a machine-to-machine communication protocol for industrial automation. The OPC UA .NET Standard Stack is widely used in various industries for secure and reliable data exchange between industrial devices and systems. However, a vulnerability has been discovered in the OPC UA .NET Standard Stack that allows a malicious client to cause a server to trigger an out of memory exception with a carefully crafted message.
Vulnerability Detail
The vulnerability in OPCFoundation.NetStandard.Opc.Ua.Core arises from a memory allocation issue. By sending a specially crafted message, a malicious client can cause the server to allocate excessive memory, leading to an out of memory exception. This can result in denial of service (DoS) conditions on the server, impacting its availability and potentially affecting other services running on the same system. The vulnerability has a CVSS score of 7.5, indicating a high severity level.
How To Fix
Latest published version: 2.0.1 as of 23 Oct 2026
Upgrading to it may include breaking changes; the version below is the minimum fixed release for this vulnerability.
If you need the minimum change
1.4.368.58
This is the first release that contains the fix.
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Workaround
There is no known workaround for this vulnerability. It is essential to update the package to the fixed version as soon as possible.
Conclusion
The OPC UA .NET Standard Stack in the OPCFoundation.NetStandard.Opc.Ua.Core package is vulnerable to a memory allocation issue that can be exploited by a malicious client. To mitigate the risk, it is recommended to update the package to version 1.4.368.58 or later. This will fix the vulnerability and prevent potential denial of service (DoS) attacks. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for OPCFoundation.NetStandard.Opc.Ua.Core →
FAQ
OPC UA (Open Platform Communications Unified Architecture) is a machine-to-machine communication protocol for industrial automation. It provides a secure and reliable means of exchanging data between industrial devices and systems.
The vulnerability allows a malicious client to cause a server to trigger an out of memory exception, leading to denial of service (DoS) conditions on the server. This can impact the availability of the server and potentially affect other services running on the same system.
To fix this vulnerability, update the OPCFoundation.NetStandard.Opc.Ua.Core package to version 1.4.368.58 or later. This version includes a fix for the memory allocation issue.
There is no known workaround for this vulnerability. It is crucial to update the package to the fixed version as soon as possible.
The CVSS score of this vulnerability is 7.5, indicating a high severity level.
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