Summary
A vulnerability has been identified in the underlying TCP/IP stack of LOGO! CMR and SIMATIC RTU 3000 devices. It could allow an attacker with network access to the LAN interface of an affected device to hijack an ongoing connection or spoof a new one. The WAN interface, however, is not affected.
Siemens has released updates for the affected products and recommends to update to the latest versions.
Vulnerabilities 1
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Unscored —
A vulnerability has been identified in LOGO! CMR2020 (All versions < V2.2), LOGO! CMR2040 (All versions < V2.2), SIMATI…
Revision history
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#3
Revision - Fixing typos
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#2
Expanded SIMATIC RTU 3000 family to specific individual affected products and added remediation for all the entries
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#1
Publication Date
References
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SSA-316383: NumberJack Vulnerability in LOGO! CMR and SIMATIC RTU 3000 devices - TXT Version
https://cert-portal.siemens.com/productcert/txt/ssa-316383.txt
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SSA-316383: NumberJack Vulnerability in LOGO! CMR and SIMATIC RTU 3000 devices - PDF Version
https://cert-portal.siemens.com/productcert/pdf/ssa-316383.pdf
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ICS Advisory ICSA-21-257-13 - Web Version
https://www.cisa.gov/news-events/ics-advisories/icsa-21-257-13
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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