CVE-2018-4850

A vulnerability has been identified in SIMATIC S7-400 (incl. F) CPU hardware version 4.0 and below (All versions), SIMATIC S7-400 (incl. F) CPU hardware version 5.0 (All firmware versions < V5.2), SIMATIC S7-400H CPU hardware version 4.5 and below (All versions). The affected CPUs improperly validate S7 communication packets which could cause a Denial-of-Service condition of the CPU. The CPU will remain in DEFECT mode until manual restart.

Score

CVSS 3.0 7.5 High

Status

Modified - productcert@siemens.com

Published

2018-05-16

Last modified

2024-09-16

Weaknesses

CWE-20

Affected products

• Simatic S7-400 Firmware (Siemens)
• Simatic S7-400h Firmware (Siemens)
• Simatic S7-400 Incl. F Cpu Hardware Version 4.0 And Below (Siemens Ag)
• Simatic S7-400 Incl. F Cpu Hardware Version 5.0 (Siemens Ag)
• Simatic S7-400h Cpu Hardware Version 4.5 And Below (Siemens Ag)

References

• http://www.securityfocus.com/bid/104217
• https://cert-portal.siemens.com/productcert/pdf/ssa-914382.pdf
• https://www.siemens.com/global/en/home/products/services/cert.html#SecurityPublications