CVE-2018-20063 : Security Advisory and Response

A security flaw has been identified in Gurock TestRail 5.6.0.3853 software, allowing remote authenticated users to execute arbitrary code by exploiting an image-upload vulnerability.

Understanding CVE-2018-20063

This CVE refers to an 'Unrestricted Upload of File' vulnerability in Gurock TestRail 5.6.0.3853, specifically in the image-upload form within the description editor.

What is CVE-2018-20063?

This vulnerability enables remote authenticated users to upload an image file with an executable extension but a safe Content-Type value. By accessing the uploaded file through a direct request to the file-upload directory, attackers can execute arbitrary code.

The Impact of CVE-2018-20063

The vulnerability allows attackers to potentially compromise the affected system by executing malicious code through the image-upload feature.

Technical Details of CVE-2018-20063

This section provides more technical insights into the vulnerability.

Vulnerability Description

The flaw in Gurock TestRail 5.6.0.3853 allows remote authenticated users to upload image files with executable extensions, leading to arbitrary code execution.

Affected Systems and Versions

Product: Gurock TestRail 5.6.0.3853
Vendor: Gurock
Versions: All versions are affected

Exploitation Mechanism

Attackers upload an image file with an executable extension and a safe Content-Type value.
They access the uploaded file directly through a request to the file-upload directory.

Mitigation and Prevention

Protecting systems from CVE-2018-20063 requires immediate actions and long-term security practices.

Immediate Steps to Take

Disable the image-upload feature in Gurock TestRail 5.6.0.3853 if not essential.
Implement strict file upload restrictions to prevent executable files.
Regularly monitor and audit file-upload directories for unauthorized content.

Long-Term Security Practices

Conduct regular security training for users on safe file upload practices.
Keep software and systems updated to patch known vulnerabilities.

Patching and Updates

Apply patches or updates provided by Gurock to address the vulnerability in TestRail.