CVE-2019-25567: Valentina Studio Buffer Overflow DoS Flaw

CVE-2019-25567 Overview

CVE-2019-25567 is a buffer overflow vulnerability affecting Valentina Studio 9.0.5 on Linux systems. The vulnerability exists in the Host field of the connection dialog, allowing local attackers to crash the application by supplying an oversized input string. Attackers can trigger the vulnerability by pasting a crafted buffer exceeding 264 bytes into the Host field during server connection attempts, causing a denial of service condition.

Critical Impact

Local attackers can cause application crashes and denial of service by exploiting improper input validation in the database connection dialog.

Affected Products

• Valentina Studio 9.0.5 (Linux)

Discovery Timeline

• 2026-03-21 - CVE CVE-2019-25567 published to NVD
• 2026-03-23 - Last updated in NVD database

Technical Details for CVE-2019-25567

Vulnerability Analysis

This vulnerability is classified as CWE-787 (Out-of-bounds Write), which occurs when the software writes data past the end or before the beginning of an intended buffer. In the context of Valentina Studio 9.0.5, the application fails to properly validate the length of user-supplied input in the Host field of the connection dialog before copying it into a fixed-size buffer.

When a user attempts to connect to a database server, the application processes the hostname input without adequate boundary checking. If the input exceeds 264 bytes, the buffer overflow condition is triggered, corrupting adjacent memory and causing the application to crash. This represents a classic stack-based or heap-based buffer overflow scenario depending on the memory allocation strategy used by the application.

The vulnerability requires local access to exploit, meaning an attacker would need to interact with the application directly on a system where Valentina Studio is installed.

Root Cause

The root cause of this vulnerability is insufficient input validation in the Host field handler within Valentina Studio's connection dialog. The application allocates a fixed-size buffer to store the hostname but does not enforce proper length restrictions before writing user-supplied data into this buffer. When input exceeding 264 bytes is provided, the write operation extends beyond the allocated buffer boundaries, resulting in memory corruption.

Attack Vector

The attack vector is local, requiring an attacker to have access to a system running Valentina Studio 9.0.5 on Linux. The exploitation process involves:

1. Opening Valentina Studio and navigating to the server connection dialog
2. Crafting a malicious input string exceeding 264 bytes
3. Pasting or entering the oversized string into the Host field
4. Initiating the connection attempt to trigger the buffer overflow

The vulnerability results in a denial of service through application crash. The overflow mechanism does not require any special privileges or user interaction beyond entering the malicious input. An exploit demonstrating this vulnerability is documented in Exploit-DB #46439.

Detection Methods for CVE-2019-25567

Indicators of Compromise

• Application crash logs showing segmentation faults or memory access violations in Valentina Studio processes
• Core dump files generated when the application terminates unexpectedly after connection attempts
• System logs indicating repeated crashes of Valentina Studio executable

Detection Strategies

• Monitor for abnormal application terminations of Valentina Studio processes on Linux systems
• Implement application crash monitoring to detect repeated denial of service attempts
• Review process crash logs for signs of buffer overflow indicators such as stack smashing detected messages

Monitoring Recommendations

• Deploy endpoint detection solutions capable of identifying buffer overflow exploitation attempts
• Configure logging for Valentina Studio application events to capture crash diagnostics
• Use SentinelOne Singularity Platform to monitor for suspicious application behavior and memory corruption indicators

How to Mitigate CVE-2019-25567

Immediate Actions Required

• Upgrade Valentina Studio to the latest available version that addresses this vulnerability
• Restrict access to systems running Valentina Studio 9.0.5 to trusted users only
• Consider using alternative database management tools until a patched version is deployed
• Monitor for application crashes that may indicate exploitation attempts

Patch Information

Users should visit the Valentina DB Home Page to check for security updates and newer versions of Valentina Studio that address this buffer overflow vulnerability. The latest Linux version can be obtained from the Valentina Studio Linux Download page.

Additional technical details about this vulnerability are available in the VulnCheck Advisory on Valentina Studio.

Workarounds

• Limit local access to systems running vulnerable versions of Valentina Studio
• Implement application whitelisting to control which users can launch Valentina Studio
• Use network-based database management alternatives where possible to reduce exposure
• Deploy endpoint protection capable of detecting and preventing buffer overflow attacks