Some TwinCAT OPC UA Server and IPC Diagnostics UA Server versions from Beckhoff Automation GmbH & Co. KG are vulnerable to denial of service attacks. The attacker needs to send several specifically crafted requests to the running OPC UA server. After some of these requests the OPC UA server is no longer responsive to any client. This is without effect to the real-time functionality of IPCs.

UPDATE A - 11.05.2021

Please note that some hardware products from Beckhoff are shipped with a TwinCAT OPC UA Server pre-installed. In some cases the server is enabled by default.

IPC Diagnostics UA Server (contained in Beckhoff’s Windows images)

• server versions up to and including 3.1.0.1 are affected
• Please note that IPC products from Beckhoff are shipped with an IPC Diagnostics UA Server pre-installed. In all cases the server is disabled by default.

The version numbers named above always refer to the version number which is accessible via OPC UA at the server via the standard OPC UA node /Objects/Server/ServerStatus/BuildInfo/SoftwareVersion and on Windows also as the file property "File version" of the file TcOpcUaServer.exe for TwinCAT OPC UA Server respectively the file DevMgrSvr-UA.exe for IPC Diagnostics UA Server.

UPDATE A - 11.05.2021

Please note that IPC products from Beckhoff are shipped with an IPC Diagnostics UA Server pre-installed. While on Windows CE it is disabled by default all other Windows images have it enabled by default.

Multiple issues have been identified in dnsmasq < 2.83

TruControl laser control software from versions 2.14.0 to 3.14.0 use sudo versions affected by CVE-2021-3156. The affected sudo has a heap-based buffer overflow, allowing privilege escalation to root via "sudoedit -s" and a command-line argument that ends with a single backslash character.

Several critical vulnerabilities within firmware.

The fdtCONTAINER component is integrated into an application (host application). The fdtCONTAINER application is a specific host application which integrates the fdtCONTAINER component.

The fdtCONTAINER component exchanges binary data blobs with such a host application. Typically, the host application saves these binary data blobs into a project storage (project file or a project database).

To manipulate the data inside the project storage, the attacker needs write access to this project storage. Additionally, the manipulated project needs to be opened by the host application. It depends on the host application whether opening the project requires a user action or not. In
fdtCONTAINER applications, the user has to open the manipulated project file manually.

In the case of opening a stored project, the deserialization of the manipulated data can be exploited.

Critical vulnerability has been discovered in the utilized component PROFINET IO Device by Hilscher Gesellschaft für Systemautomation mbH.
The impact of the vulnerability on the affected device is that it can

• no longer perform acyclic requests
• may drop all established cyclic connections may
• disappear completely from the network

For more information see advisory by Hilscher:
https://kb.hilscher.com/display/ISMS/2020-12-03+Denial+of+Service+vulnerability+in+PROFINET+IO+Device

Update 20.11.2024: Products have been added

Critical vulnerability has been discovered in the utilized component Ethernet IP Stack by Hilscher Gesellschaft für Systemautomation mbH.
The impact of the vulnerability on the affected device is that it can

• denial of service
• remote code execution
• code exposure

For more information see advisory by Hilscher:
https://kb.hilscher.com/pages/viewpage.action?pageId=108969480

Critical vulnerability has been discovered in the utilized component 499ES EtherNet/IP Stack by Real Time Automation (RTA).