CVE-2021-37186 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Reference

https://cert-portal.siemens.com/productcert/pdf/ssa-316383.pdf

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

LOW

Base Score

NONE

Base Severity

5.4