CVE-2021-37204 Information

Description

A vulnerability has been identified in SIMATIC Drive Controller family (All versions < V2.9.4) SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions) SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All versions >= V4.5.0 < V4.5.2) SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions >= V2.9.2 < V2.9.4) SIMATIC S7-1500 Software Controller (All versions) SIMATIC S7-PLCSIM Advanced (All versions < V4.0 SP1) TIM 1531 IRC (incl. SIPLUS NET variants) (All versions >= V2.2). An unauthenticated attacker could cause a denial-of-service condition in a PLC when sending specially prepared packet over port 102/tcp. A restart of the affected device is needed to restore normal operations.

CVSS Vector

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

Reference

https://cert-portal.siemens.com/productcert/pdf/ssa-838121.pdf

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5