CVE-2021-33716 Explained : Impact and Mitigation

A vulnerability has been identified in SIMATIC CP 1543-1 (incl. SIPLUS variants) and SIMATIC CP 1545-1. An attacker with access to the subnet of the affected device could retrieve sensitive information stored in cleartext.

Understanding CVE-2021-33716

This section delves into the details of the CVE-2021-33716 vulnerability.

What is CVE-2021-33716?

CVE-2021-33716 is a vulnerability found in SIMATIC CP 1543-1 (incl. SIPLUS variants) and SIMATIC CP 1545-1, allowing an attacker to access sensitive information in cleartext.

The Impact of CVE-2021-33716

The vulnerability poses a risk as attackers with access to the affected device’s subnet can retrieve sensitive information stored in cleartext.

Technical Details of CVE-2021-33716

Explore the technical aspects of CVE-2021-33716 below.

Vulnerability Description

The vulnerability in SIMATIC CP 1543-1 (incl. SIPLUS variants) and SIMATIC CP 1545-1 enables attackers to retrieve sensitive information stored in cleartext.

Affected Systems and Versions

Products affected include SIMATIC CP 1543-1 (incl. SIPLUS variants) with all versions below V3.0 and SIMATIC CP 1545-1 with all versions below V1.1.

Exploitation Mechanism

Attackers can exploit this vulnerability by gaining access to the subnet of the affected device and retrieving sensitive information in cleartext.

Mitigation and Prevention

Discover the steps to mitigate and prevent the CVE-2021-33716 vulnerability.

Immediate Steps to Take

Immediate actions include restricting network access to the affected devices and implementing strong network segmentation.

Long-Term Security Practices

Long-term solutions involve keeping systems up-to-date, monitoring for any unauthorized access, and implementing encryption for sensitive data.

Patching and Updates

Ensure you apply the necessary patches provided by Siemens to address this vulnerability effectively.