Summary
Affected applications do not properly restrict the .NET BinaryFormatter when deserializing user-controllable input. This could allow an attacker to cause a type confusion and execute arbitrary code within the affected application.
Siemens has released a new version for SIMATIC STEP 7 Safety V18 and recommends to update to the latest version.
Vulnerabilities 1
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Medium 6.3
A vulnerability has been identified in SIMATIC STEP 7 Safety V18 (All versions < V18 Update 2). Affected applications d…
Revision history
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#1
Publication Date
References
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SSA-313039: Deserialization Vulnerability in STEP 7 Safety before V19 - HTML Version
https://cert-portal.siemens.com/productcert/html/ssa-313039.html
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SSA-313039: Deserialization Vulnerability in STEP 7 Safety before V19 - PDF Version
https://cert-portal.siemens.com/productcert/pdf/ssa-313039.pdf
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SSA-313039: Deserialization Vulnerability in STEP 7 Safety before V19 - TXT Version
https://cert-portal.siemens.com/productcert/txt/ssa-313039.txt
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ICS Advisory ICSA-24-193-12 - Web Version
https://www.cisa.gov/news-events/ics-advisories/icsa-24-193-12
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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