Ameeba Chat App store presentation
Download Ameeba Chat Today
Ameeba Blog Search

CVE-2025-43549: Use After Free Vulnerability in Substance3D Stager

Ameeba’s Mission: Safeguarding privacy by securing data and communication with our patented anonymization technology.

Overview

A critical vulnerability has been identified in Substance3D – Stager, versions 3.1.1 and earlier, which could potentially lead to a complete system compromise or data leakage. This vulnerability, designated as CVE-2025-43549, has received a CVSS severity score of 7.8, pointing towards a high-risk situation. This vulnerability is of significant concern as it can result in arbitrary code execution, provided the user interacts by opening a malicious file. Given the potential impact, it is crucial for all users and system administrators to understand the nature of this vulnerability and take appropriate measures to protect their systems.

Vulnerability Summary

CVE ID: CVE-2025-43549
Severity: High (CVSS: 7.8)
Attack Vector: Local
Privileges Required: None
User Interaction: Required
Impact: Potential system compromise or data leakage

Affected Products

Ameeba Chat Icon Escape the Surveillance Era

Most apps won’t tell you the truth.
They’re part of the problem.

Phone numbers. Emails. Profiles. Logs.
It’s all fuel for surveillance.

Ameeba Chat gives you a way out.

  • • No phone number
  • • No email
  • • No personal info
  • • Anonymous aliases
  • • End-to-end encrypted

Chat without a trace.

Product | Affected Versions

Substance3D – Stager | 3.1.1 and earlier

How the Exploit Works

The vulnerability resides in the way Substance3D – Stager handles memory allocation for certain processes. A Use After Free condition occurs when the application continues to use memory after it has been freed. This can lead to a variety of outcomes, including program crashes, incorrect computations, and in some cases, the execution of arbitrary code. In this instance, an attacker can craft a malicious file that, when opened by a victim, triggers a Use After Free condition, subsequently allowing the attacker to execute arbitrary code in the context of the victim’s user session.

Conceptual Example Code

While exact exploitation methods are often kept confidential to prevent misuse, a conceptual example will help conceptualize how the vulnerability might be exploited. Here’s a high-level pseudocode representation of how the exploit might occur:

# Pseudocode for CVE-2025-43549 exploit
# Step 1: Allocate memory
memory = allocate_memory()
# Step 2: Free the memory
free_memory(memory)
# Step 3: Craft malicious payload
malicious_payload = craft_payload()
# Step 4: Use the freed memory
use_memory(memory, malicious_payload)
# Step 5: Execute payload
execute_payload(malicious_payload)

Please note that this is a simplified representation and actual exploitation would require in-depth understanding of the software’s internals and memory management mechanisms. The code is meant to illustrate the general process and is not intended for practical use.

Mitigation

Users and system administrators are advised to update to the latest version of Substance3D – Stager as soon as possible. If immediate patching is not possible, the use of a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation. Regularly update your security tools, and always be cautious before opening files from unknown or untrusted sources.

Talk freely. Stay anonymous with Ameeba Chat.

Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.
Ameeba Chat