CVE-2021-42022 : Vulnerability Insights and Analysis

A vulnerability has been identified in SIMATIC eaSie PCS 7 Skill Package that could allow an attacker to access critical files by manipulating file downloads.

Understanding CVE-2021-42022

This CVE relates to a Path Traversal vulnerability in SIMATIC eaSie PCS 7 Skill Package.

What is CVE-2021-42022?

CVE-2021-42022 is a security flaw in SIMATIC eaSie PCS 7 Skill Package versions prior to V21.00 SP3. It allows attackers to navigate outside the designated directory during file downloads.

The Impact of CVE-2021-42022

The vulnerability enables malicious actors to access sensitive files that are not intended to be retrieved, potentially compromising the integrity of the system.

Technical Details of CVE-2021-42022

This section provides intricate technical information about the CVE.

Vulnerability Description

The issue arises due to improper handling of elements in the pathname, causing the system to resolve paths to unauthorized locations, granting unauthorized access to critical files.

Affected Systems and Versions

Product: SIMATIC eaSie PCS 7 Skill Package
Vendor: Siemens
Vulnerable Versions: All versions prior to V21.00 SP3

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating the pathname during file download operations, allowing them to read restricted files.

Mitigation and Prevention

To address CVE-2021-42022, follow these steps.

Immediate Steps to Take

Disable file download functions if not required.
Implement proper input validation to prevent path traversal.

Long-Term Security Practices

Regularly update the application to the latest version.
Conduct security trainings to educate staff on secure coding practices.

Patching and Updates

Apply vendor-supplied patches or updates promptly to mitigate the vulnerability.