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When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing that VPNs may have vulnerabilities and should be updated to the most current version available.Locate control system networks and remote devices behind firewalls, and isolate them from the business network.Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet.Use VPN for protecting network communication between cellsįor more information on this vulnerability and associated software updates, please see Siemens security advisory SSA-270778ĬISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability.Siemens has identified the following specific workarounds and mitigations: For SIMATIC WinCC v7.5: update to v7.5.1 Upd1 or higher.For SIMATIC WinCC v7.4: update to v7.4 SP1 Update 14 or higher.For SIMATIC WinCC (TIA Portal) v16: update to v16 update 1 or higher.For SIMATIC WinCC (TIA Portal) v15.1: update to v15.1 Update 5 or later version.To obtain SIMATIC PCS 7 v8.2 SP1 contact your local support. SIMATIC PCS 7 v8.2: Update to v8.2 SP1 then update WinCC to v7.4 SP1 Update 14 or later version on the same system.SIMATIC NET PC Software v16: Update to v16 Update 1 or later.SIMATIC NET PC Software v14: Update to v14 SP1 Update 14 or later.For SIMATIC WinCC (TIA Portal) v14: update to v14 SP1 Update 10 or higher.For SIMATIC WinCC (TIA Portal) v13: update to v13 SP2 or higher.To obtain this update, contact Siemens customer service. For SIMATIC PCS 7 v9.0: update to v9.0 SP3 (Includes OpenPCS 7 v9.0 Upd3, SIMATIC Batch v9.0 Upd5, SIMATIC Route Control v9.0 Upd4).For SIMATIC NET PC Software: update to v16 update 1 or higher.Siemens is preparing further updates and recommends specific countermeasures until patches are available.
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Siemens has released updates for several affected products and recommends that customers update to the latest version(s).
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Nicholas Miles from Tenable reported this vulnerability to Siemens.