Summary
A vulnerability in S7-300 might allow an attacker to cause a Denial-
of-Service condition on port 102 of the affected devices by sending
specially crafted packets. Siemens recommends specific
countermeasures for products where updates are not, or not yet
available.
Vulnerabilities 1
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High 7.5
A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All ve…
Revision history
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#3
Clarify that currently no fix is planned
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#2
Added SIMATIC TDC CPU555 to the list of affected products
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#1
Publication Date
References
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SSA-492828: Denial-of-Service Vulnerability in SIMATIC S7-300 CPUs and SINUMERIK Controller - TXT Version
https://cert-portal.siemens.com/productcert/txt/ssa-492828.txt
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SSA-492828: Denial-of-Service Vulnerability in SIMATIC S7-300 CPUs and SINUMERIK Controller - PDF Version
https://cert-portal.siemens.com/productcert/pdf/ssa-492828.pdf
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ICS Advisory ICSA-20-315-04 - Web Version
https://www.cisa.gov/news-events/ics-advisories/icsa-20-315-04
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Recommended Practices
https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01
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Recommended Practices
https://www.cisa.gov/resources-tools/resources/ics-recommended-practices
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Recommended Practices
https://www.cisa.gov/topics/industrial-control-systems
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Recommended Practices
https://us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
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Recommended Practices
https://www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf
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Recommended Practices
https://www.cisa.gov/uscert/ics/tips/ICS-TIP-12-146-01B