Beckhoff: Local authentication bypass in IPC-Diagnostics package included in TwinCAT/BSD operating system
By default, TwinCAT/BSD-based products have a device-specific web interface for web-based management (WBM) enabled, developed by Beckhoff and known as Beckhoff Device Manager UI. It can be accessed remotely or locally. When accessed locally, the authentication mechanism for the web interface can be bypassed by any local user, regardless of their permissions, and they can act with administrative access rights via this mechanism.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2024-41173US | —OT elevated | — | ||
The IPC-Diagnostics package included in TwinCAT/BSD is vulnerable to a local authentication bypass by a low privileged attacker. | ||||
references
External citations — patches, advisories, analysis.
- VDE-2024-045: Beckhoff: Local authentication bypass in IPC-Diagnostics package included in TwinCAT/BSD operating system - CSAFself
- VDE-2024-045: Beckhoff: Local authentication bypass in IPC-Diagnostics package included in TwinCAT/BSD operating system - HTMLself
- CERT@VDE Security Advisories for Beckhoff Automation GmbH & Co. KGexternal
- Beckhoff Security Advisory 2024-001: Local authentication bypass in TwinCAT/BSD package 'IPC-Diagnostics' - PDF versionself
- Detailed information on updating the TwinCAT/BSD operating systemexternal
- Additional information about the latest IPC security advisories is provided here:external
remediations (2)
- Mitigation
Avoid the existence of user accounts with login permission on the target other than administrator access. By default, TwinCAT/BSD has preconfigured user accounts with lower privileges, but none of them have a password, which results in them being denied login access. Avoid running third-party applications on the target that have not been properly audited, regardless of the user they are running as.
- Fixed
Please update to a recent version of the affected product.
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