Severity

Medium

Analysis Summary

An attacker with physical access to the UART interface could access additional diagnostic functionality. Successful exploitation could compromise confidentiality, integrity, and availability of the affected system.

Impact

Exposed Dangerous Method or Function

Affected Vendors

Siemens

Affected Products

S7-1200: all versions

Remediation

Siemens recommends following workarounds and mitigations that users of the S7-122 CPU can apply to reduce the risk:

Ensure physical access protection.
Apply Defense-in-Depth.