Authentication Bypass in Siemens SIMATIC S7-1200 CPU Family
CVE-2021-37172

7.5HIGH

Key Information:

Vendor
Siemens
Status
Simatic S7-1200 Cpu Family (incl. Siplus Variants)
Vendor
CVE Published:
10 August 2021

Summary

A significant vulnerability exists in the Siemens SIMATIC S7-1200 CPU family, specifically affecting versions provisioned with TIA Portal V13. Devices configured with V4.5.0 fail to properly authenticate against set passwords, allowing attackers using TIA Portal V13 or later versions to bypass security measures. This could enable unauthorized users to download and execute arbitrary programs on the programmable logic controllers (PLCs). It is important to note that this vulnerability does not impact devices provisioned using TIA Portal V13 SP1 or subsequent versions.

Affected Version(s)

SIMATIC S7-1200 CPU family (incl. SIPLUS variants) V4.5.0

References

https://cert-portal.siemens.com/productcert/pdf/ssa-83019...
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.