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SSA-042050 V1.0: Know-How Protection Mechanism Failure in TIA Portal
Siemens ProductCERT Security Advisories cert-portal.siemens.com
The know-how protection feature in Totally Integrated Automation Portal (TIA Portal) does not properly update the encryption of existing program blocks when a project file is updated. This could allow attackers with access to the project file to recover previous - yet unprotected - versions of the project without the knowledge of the know-how protection password.
Siemens recommends specific countermeasures for products where updates are not, or not yet available.
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