CVE-2018-4850

A vulnerability has been identified in SIMATIC S7-400 (incl. F) CPU hardware version 4.0 and below (All versions), SIMATIC S7-400 (incl. F) CPU hardware version 5.0 (All firmware versions < V5.2), SIMATIC S7-400H CPU hardware version 4.5 and below (All versions). The affected CPUs improperly validate S7 communication packets which could cause a Denial-of-Service condition of the CPU. The CPU will remain in DEFECT mode until manual restart.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
siemensCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 68%
VendorProductVersion
siemenssimatic_s7-400_firmware
𝑥
≤ 4.0
siemenssimatic_s7-400_firmware
𝑥
< 5.2
siemenssimatic_s7-400h_firmware
𝑥
≤ 4.5
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
http://www.securityfocus.com/bid/104217
https://cert-portal.siemens.com/productcert/pdf/ssa-914382.pdf
https://www.siemens.com/global/en/home/products/services/cert.html#SecurityPublications
http://www.securityfocus.com/bid/104217
https://cert-portal.siemens.com/productcert/pdf/ssa-914382.pdf
https://www.siemens.com/global/en/home/products/services/cert.html#SecurityPublications