Summary
OpenSSL has published a stack based buffer overflow vulnerability that allows a remote attacker to cause a denial of service (DoS) or potentially allow for remote code execution.
Siemens has released new versions for several affected products and recommends to update to the latest versions. Siemens is preparing further fix versions and recommends specific countermeasures for products where fixes are not, or not yet available.
Vulnerabilities 1
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High 8.8
Stack buffer overflow in CMS (Auth)EnvelopedData parsing
Issue summary: Parsing CMS AuthEnvelopedData or EnvelopedData message with maliciously crafted AEAD parameters can trigger a stack buffer overflow. Impact summary: A stack buffer overflow may lead to a crash, causing Denial of Service, or potentially remote c…
Revision history
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#6
CISA Republication update based on Siemens ProductCERT SSA-434797 advisory
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#5
Updated remediation for AI Lightweight Inference Server to no fix planned.
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#4
Added RUGGEDCOM ROX II family and SIMATIC HMI Operator Device to Known Not Affected and removed SIMATIC Comfort/Mobile RT and updated SIMATIC Advanced HMI Panels and SIMATIC HMI Basic Panels to no fix available; Added fix for SIMATIC PDM V9.3 and added PCS neo V6.0 and Simatic Logon to affected products.
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#3
Added SCALANCE X-200 family, X-200IRT family, X-200RNA family, X-300/408 family, SC-600 family to Known Not Affected and fix for SINUMERIK Access MyMachine /OPC UA , SIMOVE Fleetmanager. Updated remediation to No fix planned for SIMATIC Comfort/Mobile RT
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#2
CISA Republication - Initial CISA Republication of Siemens ProductCERT SSA-434797 advisory
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#1
Publication Date
References
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SSA-434797: Buffer Overflow Vulnerability in OpenSSL affecting Siemens Products - HTML Version
https://cert-portal.siemens.com/productcert/html/ssa-434797.html
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ICS Advisory ICSA-26-174-03 - Web Version
https://www.cisa.gov/news-events/ics-advisories/icsa-26-174-03
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Recommended Practices
https://www.cisa.gov/news-events/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://www.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/news-events/news/targeted-cyber-intrusion-detection-and-mitigation-strategies-update-b