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 (TIA Portal) V18 and recommends to update to the latest version. Siemens recommends specific countermeasures for products where fixes are not, or not yet available.
Vulnerabilities 1
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High 7.8
A vulnerability has been identified in SIMATIC PCS neo V4.0 (All versions), SIMATIC STEP 7 V16 (All versions), SIMATIC …
Revision history
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#1
Publication Date
References
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SSA-825651: Deserialization Vulnerability in SIMATIC STEP 7 (TIA Portal) before V18 Update 2 - HTML Version
https://cert-portal.siemens.com/productcert/html/ssa-825651.html
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SSA-825651: Deserialization Vulnerability in SIMATIC STEP 7 (TIA Portal) before V18 Update 2 - PDF Version
https://cert-portal.siemens.com/productcert/pdf/ssa-825651.pdf
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SSA-825651: Deserialization Vulnerability in SIMATIC STEP 7 (TIA Portal) before V18 Update 2 - TXT Version
https://cert-portal.siemens.com/productcert/txt/ssa-825651.txt
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ICS Advisory ICSA-24-193-17 - Web Version
https://www.cisa.gov/news-events/ics-advisories/icsa-24-193-17
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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