CVE-2021-46304 : Exploit Details and Defense Strategies

A vulnerability has been identified in CP-8000 MASTER MODULE WITH I/O -25/+70°C, CP-8000 MASTER MODULE WITH I/O -40/+70°C, CP-8021 MASTER MODULE, and CP-8022 MASTER MODULE WITH GPRS, affecting all versions. The vulnerability allows unauthenticated access to the web server module, potentially exposing confidential information to attackers.

Understanding CVE-2021-46304

This CVE affects several Siemens products, enabling unauthorized access to web pages and potential extraction of sensitive data.

What is CVE-2021-46304?

The vulnerability in the affected Siemens modules grants unauthorized access to their web pages through an activated web server module, allowing attackers to obtain critical system details.

The Impact of CVE-2021-46304

The exploitation of this vulnerability could lead to data exposure, including internal network layouts or connected systems, providing valuable information to malicious actors.

Technical Details of CVE-2021-46304

This section provides more insights into the vulnerability.

Vulnerability Description

The vulnerability permits unauthenticated access to the web server module of the affected devices, exposing them to potential exploitation by threat actors.

Affected Systems and Versions

CP-8000 MASTER MODULE WITH I/O -25/+70°C (All versions)
CP-8000 MASTER MODULE WITH I/O -40/+70°C (All versions)
CP-8021 MASTER MODULE (All versions)
CP-8022 MASTER MODULE WITH GPRS (All versions)

Exploitation Mechanism

Attackers can exploit this flaw to gain unauthorized access to web pages, potentially retrieving critical information like network topology and system connections.

Mitigation and Prevention

It is crucial to take immediate and long-term security measures to address this vulnerability.

Immediate Steps to Take

Disable the web server module on the affected devices if not required
Implement network segmentation to limit access to vulnerable systems
Monitor network traffic for any suspicious activities

Long-Term Security Practices

Regularly update firmware and software patches provided by Siemens
Conduct security assessments and penetration testing on the affected devices
Train personnel on cybersecurity best practices and awareness

Patching and Updates

Siemens may release security patches and updates to remedy this vulnerability and enhance the security of the affected products.