Published: 14/09/2021 Updated: 29/04/2022

CVSS v2 Base Score: 4.8 | Impact Score: 4.9 | Exploitability Score: 6.5

CVSS v3 Base Score: 5.4 | Impact Score: 2.5 | Exploitability Score: 2.8

VMScore: 427

Vector: AV:A/AC:L/Au:N/C:P/I:P/A:N

A vulnerability has been identified in LOGO! CMR2020 (All versions < V2.2), LOGO! CMR2040 (All versions < V2.2), SIMATIC RTU3010C (All versions < V4.0.9), SIMATIC RTU3030C (All versions < V4.0.9), SIMATIC RTU3031C (All versions < V4.0.9), SIMATIC RTU3041C (All versions < V4.0.9). The underlying TCP/IP stack does not properly calculate the random numbers used as ISN (Initial Sequence Numbers). An adjacent attacker with network access to the LAN interface could interfere with traffic, spoof the connection and gain access to sensitive information.

Vulnerable Product	Search on Vulmon	Subscribe to Product
siemens logo! cmr2020 firmware
siemens logo! cmr2040 firmware
siemens simatic rtu3010c firmware
siemens simatic rtu3030c firmware
siemens simatic rtu3031c firmware
siemens simatic rtu3041c firmware

Critical Infrastructure Sectors: Energy

CWE-330 https://cert-portal.siemens.com/productcert/pdf/ssa-316383.pdf https://nvd.nist.gov https://www.cisa.gov/uscert/ics/advisories/icsa-21-257-13

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CVE-2021-37186

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