Undocumented Debug Port Vulnerability in Siemens CP-8000 and CP-8021 Modules
CVE-2021-45033

8.8HIGH

Key Information:

Vendor

Siemens
Status
Cp-8000 Master Module With I/o -25/+70°c
Cp-8000 Master Module With I/o -40/+70°c
Cp-8021 Master Module
Cp-8022 Master Module With Gprs
Vendor
CVE Published:
11 January 2022

What is CVE-2021-45033?

A security flaw within Siemens CP-8000 and CP-8021 Master Modules allows for unauthorized access to an administrative debug shell due to an undocumented debug port secured by hard-coded default credentials. This vulnerability is particularly concerning as it can be exploited if the debug port is enabled by a privileged user, allowing attackers who possess this knowledge to leverage administrative capabilities on the affected devices.

Affected Version(s)

CP-8000 MASTER MODULE WITH I/O -25/+70°C All versions < V16.20

CP-8000 MASTER MODULE WITH I/O -40/+70°C All versions < V16.20

CP-8021 MASTER MODULE All versions < V16.20

References

https://cert-portal.siemens.com/productcert/pdf/ssa-32499...
x_refsource_MISC

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.