Summary
A vulnerability exists in affected products that could allow remote attackers to affect the availability of the devices under certain conditions.
The integrated ICMP services in the underlying TCP/IP stack is vulnerable to a denial of service attack through specially crafted ICMP packets. A successful attack will impact the availability of ICMP services on affected products for a limited time before it restores itself after the attack ceases.
Other communication services are not affected by this vulnerability.
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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Medium 5.3
The integrated ICMP service of the network stack of affected devices can be forced to exhaust its available memory reso…
Revision history
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#3
Clarified fix version for SIMATIC PN/PN Coupler (6ES7158-3AD10-0XA0) and SIPLUS NET PN/PN Coupler (6AG2158-3AD10-4XA0): V6.0.0 or later version
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#2
Added fix for SIMATIC PN/PN Coupler (6ES7158-3AD10-0XA0), SIPLUS NET PN/PN Coupler (6AG2158-3AD10-4XA0) and SIMATIC S7-410 V10 CPU family (incl. SIPLUS variants)
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#1
Publication Date
References
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SSA-725549: Denial of Service of ICMP in Industrial Devices - HTML Version
https://cert-portal.siemens.com/productcert/html/ssa-725549.html
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ICS Advisory ICSA-25-105-03 - Web Version
https://www.cisa.gov/news-events/ics-advisories/icsa-25-105-03
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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