CVE-2024-43647

HIGH8.7Denial of service

Description

A vulnerability has been identified in SIMATIC S7-200 SMART CPU CR40 (6ES7288-1CR40-0AA0) (All versions), SIMATIC S7-200 SMART CPU CR60 (6ES7288-1CR60-0AA0) (All versions), SIMATIC S7-200 SMART CPU SR20 (6ES7288-1SR20-0AA0) (All versions), SIMATIC S7-200 SMART CPU SR20 (6ES7288-1SR20-0AA1) (All versions), SIMATIC S7-200 SMART CPU SR30 (6ES7288-1SR30-0AA0) (All versions), SIMATIC S7-200 SMART CPU SR30 (6ES7288-1SR30-0AA1) (All versions), SIMATIC S7-200 SMART CPU SR40 (6ES7288-1SR40-0AA0) (All versions), SIMATIC S7-200 SMART CPU SR40 (6ES7288-1SR40-0AA1) (All versions), SIMATIC S7-200 SMART CPU SR60 (6ES7288-1SR60-0AA0) (All versions), SIMATIC S7-200 SMART CPU SR60 (6ES7288-1SR60-0AA1) (All versions), SIMATIC S7-200 SMART CPU ST20 (6ES7288-1ST20-0AA0) (All versions), SIMATIC S7-200 SMART CPU ST20 (6ES7288-1ST20-0AA1) (All versions), SIMATIC S7-200 SMART CPU ST30 (6ES7288-1ST30-0AA0) (All versions), SIMATIC S7-200 SMART CPU ST30 (6ES7288-1ST30-0AA1) (All versions), SIMATIC S7-200 SMART CPU ST40 (6ES7288-1ST40-0AA0) (All versions), SIMATIC S7-200 SMART CPU ST40 (6ES7288-1ST40-0AA1) (All versions), SIMATIC S7-200 SMART CPU ST60 (6ES7288-1ST60-0AA0) (All versions), SIMATIC S7-200 SMART CPU ST60 (6ES7288-1ST60-0AA1) (All versions). Affected devices do not properly handle TCP packets with an incorrect structure. This could allow an unauthenticated remote attacker to cause a denial of service condition. To restore normal operations, the network cable of the device needs to be unplugged and re-plugged.

CVSS breakdown

CVSS 4.0

Attack Vector

Network

Attack Complexity

Low

Attack Requirements

None

Privileges Required

None

User Interaction

None

Confidentiality (Vulnerable System)

None

Integrity (Vulnerable System)

None

Availability (Vulnerable System)

High

Confidentiality (Subsequent System)

None

Integrity (Subsequent System)

None

Availability (Subsequent System)

None

CVSS 3.1

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Physical

Changed

Affected products

Siemens / SIMATIC S7-200 SMART CPU CR400 – *
Siemens / SIMATIC S7-200 SMART CPU CR600 – *
Siemens / SIMATIC S7-200 SMART CPU SR200 – *
Siemens / SIMATIC S7-200 SMART CPU SR300 – *
Siemens / SIMATIC S7-200 SMART CPU SR400 – *
Siemens / SIMATIC S7-200 SMART CPU SR600 – *
Siemens / SIMATIC S7-200 SMART CPU ST200 – *
Siemens / SIMATIC S7-200 SMART CPU ST300 – *
Siemens / SIMATIC S7-200 SMART CPU ST400 – *
Siemens / SIMATIC S7-200 SMART CPU ST600 – *

References

MISChttps://cert-portal.siemens.com/productcert/html/ssa-969738.html