Siemens SIMATIC S7-400 CPU (Update A)

Vulnerabilities 1

• Unscored —
  CVE-2018-4850

  A vulnerability has been identified in SIMATIC S7-400 (incl. F) CPU hardware version 4.0 and below (All versions), SIMA…

  Siemens SIMATIC S7-400 (incl. F) CPU hardware version 4.0 and below, SIMATIC S7-400 (incl. F) CPU hardware version 5.0, SIMATIC S7-400H CPU hardware version 4.5 and below ICS / OT
  May 16, 2018

Revision history

1. 2020-02-10 #3

   SIPLUS devices now explicitly mentioned in the list of affected products

2. 2018-09-11 #2

   Added hint to Workarounds section

3. 2018-05-15 #1

   Publication Date

References

• SSA-914382: Denial-of-Service Vulnerability in SIMATIC S7-400 CPU Family - HTML Version
  https://cert-portal.siemens.com/productcert/html/ssa-914382.html
• ICS Advisory ICSA-18-137-03 - Web Version
  https://www.cisa.gov/news-events/ics-advisories/icsa-18-137-03
• Recommended Practices
  https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01
• Recommended Practices
  https://www.cisa.gov/resources-tools/resources/ics-recommended-practices
• Recommended Practices
  https://www.cisa.gov/topics/industrial-control-systems
• Recommended Practices
  https://us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
• Recommended Practices
  https://www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf
• Recommended Practices
  https://www.cisa.gov/uscert/ics/tips/ICS-TIP-12-146-01B