CVE-2020-25234 : Exploit Details and Defense Strategies

A vulnerability has been identified in LOGO! 8 BM (incl. SIPLUS variants) and LOGO! Soft Comfort versions below V8.3, allowing attackers to reverse engineer user-defined functions (UDFs) from stored program files.

Understanding CVE-2020-25234

This CVE involves a vulnerability in Siemens' LOGO! 8 BM and LOGO! Soft Comfort software versions.

What is CVE-2020-25234?

The vulnerability allows the saving of UDFs in a password-protected manner, which can be reverse engineered by attackers from stored program files.

The Impact of CVE-2020-25234

The vulnerability could lead to unauthorized access to sensitive information and compromise the integrity of user-defined functions.

Technical Details of CVE-2020-25234

This section provides technical details of the vulnerability.

Vulnerability Description

The vulnerability in LOGO! software versions allows attackers to reverse engineer UDFs from stored program files.

Affected Systems and Versions

Product: LOGO! 8 BM (incl. SIPLUS variants)
Vendor: Siemens
Versions Affected: All versions < V8.3
Product: LOGO! Soft Comfort
Vendor: Siemens
Versions Affected: All versions < V8.3

Exploitation Mechanism

Attackers can exploit the vulnerability by reverse engineering UDFs directly from stored program files.

Mitigation and Prevention

Protect systems from CVE-2020-25234 with the following measures.

Immediate Steps to Take

Update affected software to version V8.3 or higher.
Monitor for any unauthorized access or changes to user-defined functions.

Long-Term Security Practices

Implement strong password policies for accessing and modifying UDFs.
Regularly review and update security protocols to prevent unauthorized access.

Patching and Updates

Apply patches and updates provided by Siemens to address the vulnerability.