CVE-2025-47181 Concept: Microsoft Edge Link Following Privilege Escalation

Project Overview

This repository presents the CVE-2025-47181 Concept, a Python program designed to illustrate the mechanism and impact of CVE-2025-47181. This is a Privilege Escalation vulnerability in Microsoft Edge (Chromium-based), categorized as "Improper link resolution before file access ('link following')" (CWE-59). This vulnerability allows an authorized local attacker to elevate their privileges on the system.

This program does not contain actual exploit code for CVE-2025-47181. Instead, it models the fundamental steps of a "link following" attack:

• Creating a trusted temporary directory (like one used by Edge's updater).
• Creating a malicious symbolic link (symlink) within that directory that points to a sensitive, highly privileged system file.
• Modeling a trusted process (e.g., the Edge updater) unknowingly writing a file into this symlinked path, which effectively writes to the sensitive system file instead.
• Verifying if the sensitive file was modified, indicating successful privilege escalation.
• Including a conceptual monitoring system to highlight detection challenges.

The primary purpose of this project is educational: to help understand the concept of "link following" vulnerabilities, how they can lead to privilege escalation, and the importance of secure file handling practices and robust system monitoring in cybersecurity.

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⚠️ Important Security Notice ⚠️

THIS CODE IS A CONCEPTUAL MODEL ONLY. IT DOES NOT CONTAIN LIVE EXPLOIT CODE AND MUST NOT BE USED TO ATTEMPT REAL-WORLD ATTACKS.

• Educational Purpose: This project is solely for academic understanding and demonstration of vulnerability concepts.
• No Real-World Exploitation: Absolutely DO NOT attempt to adapt or use these concepts for any malicious or non-simulated activity. Exploiting vulnerabilities in systems you do not own or have explicit permission to test is illegal and unethical.
• Isolated Environment: Even for conceptual modeling, it's best practice to execute such code in a safe, isolated virtual machine environment.

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⚙️ How the Concept Works: Core Principles

The CVE-2025-47181 Concept models the following steps:

1. Trusted Temporary Directory Creation

   The program sets up a conceptual directory (C:\EdgeUpdater\Temp\) that represents a location where a privileged application (like the Microsoft Edge Updater) might create temporary files with elevated permissions.

2. Malicious Symbolic Link Creation

   An attacker, operating with standard user privileges, creates a symbolic link (SYMLINK_NAME) inside this conceptual trusted temporary directory. This symlink points to a sensitive system file or directory (TARGET_SENSITIVE_FILE) that normally requires higher privileges to modify (e.g., a DLL in System32).

3. "Trusted" File Write Operation (Link Following)

   The program then models the trusted application (Edge Updater) attempting to write a legitimate temporary file (FILE_TO_BE_WRITTEN_BY_EDGE) into its trusted temporary directory. Due to the "Improper link resolution" vulnerability (CWE-59), the trusted application's write operation unknowingly "follows" the malicious symlink, causing its privileged write to occur at the symlink's target location (the TARGET_SENSITIVE_FILE).

4. Conceptual Privilege Escalation

   If the sensitive system file is successfully overwritten or modified by the trusted application's write operation, it demonstrates that a low-privileged attacker has conceptually achieved privilege escalation. They leveraged the trusted application's privileges to modify a file they otherwise couldn't.

5. Conceptual Detection (SystemMonitor)

   A SystemMonitor class is included to model how security tools (e.g., EDR, file integrity monitoring) might detect suspicious activities, such as the creation of symlinks to sensitive paths or unexpected writes to protected system directories.

This program illustrates how a flaw in file path resolution can be abused by attackers to bypass access controls and escalate privileges.

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🚀 Getting Started

Prerequisites

Ensure you have a Python 3 environment installed. This basic program uses only standard Python libraries (os, time, sys, shutil). Note that creating symbolic links on Windows often requires specific user permissions or developer mode enabled.

python --version

Installation
Clone this repository:
git clone [https://github.com/your-username/CVE_2025_47181_Concept.git](https://github.com/your-username/CVE_2025_47181_Concept.git)
cd CVE_2025_47181_Concept

💻 Code Structure
The project consists of a single Python script:
cve_2025_47181_exploit_concept.py
This file contains the full source code for the "link following" privilege escalation conceptual model.
🏃 Running the Program
Execute the main script:
python cve_2025_47181_exploit_concept.py