Specially crafted PROFINET DCP packets sent on a local Ethernet segment (Layer 2) to an affected product could cause a denial of service condition of that product. Human interaction is required to recover the system. PROFIBUS interfaces are not affected. This vulnerability affects only SIMATIC HMI Multi Panels and HMI Mobile Panels, and S7-300/S7-400 devices.

References

• https://nvd.nist.gov/vuln/detail/CVE-2017-2681
• https://cert-portal.siemens.com/productcert/pdf/ssa-293562.pdf
• https://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-293562.pdf
• http://www.securityfocus.com/bid/98369
• http://www.securitytracker.com/id/1038463
• https://cert-portal.siemens.com/productcert/html/ssa-293562.html