CVE-2019-19102 : Vulnerability Insights and Analysis

A directory traversal vulnerability in the SharpZipLib library used in the upgrade service of B&R Automation Studio versions 4.0.x, 4.1.x, and 4.2.x allows unauthorized individuals to write to specific local directories, commonly known as zip slip.

Understanding CVE-2019-19102

An overview of the Zip Slip vulnerability affecting B&R Automation Studio.

What is CVE-2019-19102?

The CVE-2019-19102 vulnerability involves a directory traversal issue in the SharpZipLib library utilized in B&R Automation Studio's upgrade service, enabling unauthorized writing to specific local directories.

The Impact of CVE-2019-19102

CVSS Base Score: 5.5 (Medium Severity)
Attack Vector: Local
Integrity Impact: High
User Interaction: Required
Vulnerability Type: Path Traversal (CWE-22)

Technical Details of CVE-2019-19102

Insights into the vulnerability's technical aspects.

Vulnerability Description

The vulnerability allows unauthenticated users to write to certain local directories due to improper handling of file paths in the SharpZipLib library.

Affected Systems and Versions

Affected Product: Automation Studio
Vendor: B&R
Affected Versions: 4.0.x, 4.1.x, 4.2.x

Exploitation Mechanism

The vulnerability can be exploited by manipulating file paths during the upgrade process, leading to unauthorized write access to specific directories.

Mitigation and Prevention

Best practices to mitigate the CVE-2019-19102 vulnerability.

Immediate Steps to Take

Update to the latest version of B&R Automation Studio that includes a patched version of the SharpZipLib library.
Implement proper input validation to prevent directory traversal attacks.

Long-Term Security Practices

Regularly monitor and update third-party libraries to address known vulnerabilities.
Conduct security assessments to identify and remediate similar path traversal issues.

Patching and Updates

Apply security patches provided by B&R for Automation Studio to address the Zip Slip vulnerability.