Summary
SIMATIC S7-200 SMART devices contain an information disclosure vulnerability which leaves the system susceptible to a family of attacks which rely on the use of predictable IP ID sequence numbers as their base method of attack and eventually could allow an attacker to create a denial of service condition.
Siemens recommends specific countermeasures for products where fixes are not, or not yet available.
Vulnerabilities 1
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High 8.2
A vulnerability has been identified in SIMATIC S7-200 SMART CPU CR40 (6ES7288-1CR40-0AA0) (All versions), SIMATIC S7-20…
Revision history
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#1
Publication Date
References
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SSA-481506: Information Disclosure Vulnerability in SIMATIC S7-200 SMART Devices - HTML Version
https://cert-portal.siemens.com/productcert/html/ssa-481506.html
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SSA-481506: Information Disclosure Vulnerability in SIMATIC S7-200 SMART Devices - PDF Version
https://cert-portal.siemens.com/productcert/pdf/ssa-481506.pdf
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SSA-481506: Information Disclosure Vulnerability in SIMATIC S7-200 SMART Devices - TXT Version
https://cert-portal.siemens.com/productcert/txt/ssa-481506.txt
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ICS Advisory ICSA-24-165-02 - Web Version
https://www.cisa.gov/news-events/ics-advisories/icsa-24-165-02
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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