What is the severity of CVE-2023-33921?

CVE-2023-33921 is considered high severity due to the potential for unauthorized access via an exposed UART console.

How do I fix CVE-2023-33921?

To mitigate CVE-2023-33921, update the affected devices to the CPCI85 V05 firmware or later.

Which devices are affected by CVE-2023-33921?

CVE-2023-33921 affects all versions of the CP-8031 MASTER MODULE and CP-8050 MASTER MODULE prior to CPCI85 V05.

What can an attacker do with CVE-2023-33921?

An attacker with physical access can exploit CVE-2023-33921 to brute force or crack the root password using the exposed UART console.

Is there a workaround for CVE-2023-33921 if immediate patching is not possible?

If immediate patching is not feasible for CVE-2023-33921, restrict physical access to the affected devices to prevent exploitation.

Vulnerability/
CVE-2023-33921

medium

6.8

CWE

749

13/6/2023

2/1/2025

CVE-2023-33921

First published: Tue Jun 13 2023(Updated: )

A vulnerability has been identified in CP-8031 MASTER MODULE (All versions < CPCI85 V05), CP-8050 MASTER MODULE (All versions < CPCI85 V05). The affected devices contain an exposed UART console login interface. An attacker with direct physical access could try to bruteforce or crack the root password to login to the device.

Credit: productcert@siemens.com

Affected Software	Affected Version	How to fix
Siemens Cpci85 Firmware	<v05
Siemens Cp-8050 Master Module
Siemens Cp-8031 Master Module

Remedy

https://cert-portal.siemens.com/productcert/pdf/ssa-731916.pdf

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Reference Links

Frequently Asked Questions

What is the severity of CVE-2023-33921?
CVE-2023-33921 is considered high severity due to the potential for unauthorized access via an exposed UART console.
How do I fix CVE-2023-33921?
To mitigate CVE-2023-33921, update the affected devices to the CPCI85 V05 firmware or later.
Which devices are affected by CVE-2023-33921?
CVE-2023-33921 affects all versions of the CP-8031 MASTER MODULE and CP-8050 MASTER MODULE prior to CPCI85 V05.
What can an attacker do with CVE-2023-33921?
An attacker with physical access can exploit CVE-2023-33921 to brute force or crack the root password using the exposed UART console.
Is there a workaround for CVE-2023-33921 if immediate patching is not possible?
If immediate patching is not feasible for CVE-2023-33921, restrict physical access to the affected devices to prevent exploitation.

collector/nvd-index
agent/softwarecombine
agent/type
collector/mitre-cve
source/MITRE
agent/last-modified-date
agent/author
agent/references
agent/remedy
agent/weakness
agent/severity
agent/description
agent/event
agent/first-publish-date
agent/tags
agent/source
vendor/siemens
canonical/siemens cpci85 firmware
canonical/siemens cp-8050 master module
canonical/siemens cp-8031 master module

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Frequently Asked Questions

What is the severity of CVE-2023-33921?
CVE-2023-33921 is considered high severity due to the potential for unauthorized access via an exposed UART console.
How do I fix CVE-2023-33921?
To mitigate CVE-2023-33921, update the affected devices to the CPCI85 V05 firmware or later.
Which devices are affected by CVE-2023-33921?
CVE-2023-33921 affects all versions of the CP-8031 MASTER MODULE and CP-8050 MASTER MODULE prior to CPCI85 V05.
What can an attacker do with CVE-2023-33921?
An attacker with physical access can exploit CVE-2023-33921 to brute force or crack the root password using the exposed UART console.
Is there a workaround for CVE-2023-33921 if immediate patching is not possible?
If immediate patching is not feasible for CVE-2023-33921, restrict physical access to the affected devices to prevent exploitation.