SB2021091612 - Multiple vulnerabilities in Siemens LOGO CMR and SIMATIC RTU 3000

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Main Vulnerability Database SB2021091612

SB2021091612 - Multiple vulnerabilities in Siemens LOGO CMR and SIMATIC RTU 3000

Published: September 16, 2021

Security Bulletin ID SB2021091612
Severity
Medium
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 67% Low 33%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 secuirty vulnerabilities.


1) Use of insufficiently random values (CVE-ID: CVE-2021-37186)

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the underlying TCP/IP stack does not properly calculate the random numbers used as ISN (Initial Sequence Numbers). A remote attacker on the local network can spoof the connection and gain access to sensitive information.


2) Buffer overflow (CVE-ID: CVE-2020-36475)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error when generating Diffie-Hellman key pairs. A remote attacker can trigger memory corruption and cause a denial of service condition on the target system.


3) Improper Certificate Validation (CVE-ID: CVE-2020-36478)

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to improper certificate validation. A remote attacker can perform a man-in-the-middle (MitM) attack.


Remediation

Install update from vendor's website.

References