CVE-2021-37172

A vulnerability has been identified in SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (V4.5.0). Affected devices fail to authenticate against configured passwords when provisioned using TIA Portal V13. This could allow an attacker using TIA Portal V13 or later versions to bypass authentication and download arbitrary programs to the PLC. The vulnerability does not occur when TIA Portal V13 SP1 or any later version was used to provision the device.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
siemensCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 41%
VendorProductVersion
siemenssimatic_s7-1200_cpu_firmware
4.5.0
siemenssimatic_step_7_\(tia_portal\)
𝑥
≤ 13.0
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://cert-portal.siemens.com/productcert/pdf/ssa-830194.pdf
https://cert-portal.siemens.com/productcert/pdf/ssa-830194.pdf