CVE-2021-40368 Information

Description

A vulnerability has been identified in SIMATIC S7-400 H V6 CPU family (incl. SIPLUS variants) (All versions < V6.0.10) SIMATIC S7-400 PN/DP V7 CPU family (incl. SIPLUS variants) (All versions) SIMATIC S7-410 V10 CPU family (incl. SIPLUS variants) (All versions < V10.1) SIMATIC S7-410 V8 CPU family (incl. SIPLUS variants) (All versions). Affected devices improperly handle specially crafted packets sent to port 102/tcp. This could allow an attacker to create a Denial-of-Service condition. A restart 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-557541.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