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BIOS Image Parser Exploit Tool 💻

This tool is a demonstration of exploiting a buffer overflow vulnerability in a BIOS image parser. It is intended for educational purposes only.

Overview ℹ️

This exploit targets a hypothetical buffer overflow vulnerability in a BIOS firmware's image parser function called parse_image(). The vulnerability allows attackers to craft a malicious BMP image file that triggers the buffer overflow and executes arbitrary code during the boot process.

Usage 🚀

1. Craft the Payload: Write the shellcode for the desired payload (e.g., rootkit installation, payload loading, etc.) and save it in a file named shellcode.bin.

2. Craft the Malicious Image File: Craft a malicious BMP image file containing the shellcode to exploit the vulnerability.

3. Compile and Run: Assemble the exploit code and inject it into the BIOS image. Boot the system with the modified BIOS image to trigger the exploit.

Exploit Steps 🛠️

1. Craft Payload: Write the shellcode and embed it in the exploit code.

2. Craft Malicious Image File: Inject the shellcode into a BMP image file.

3. Trigger the Exploit: Load the malicious image file into memory and exploit the vulnerability during the BIOS boot process.

Code Structure 🧱

The code consists of the following sections:

• Malicious Code: Contains the shellcode to be executed during the exploit.
• Shellcode: Loads and executes a file (e.g., payload.exe) on system startup.
• Main Code: Initiates the exploit by loading the malicious image file into memory and triggering the vulnerability.
• File Open and Read Error Handling: Handles errors that occur during file open and read operations.

Vulnerability Mitigation 🛡️

To mitigate buffer overflow vulnerabilities like this, proper input validation and bounds checking must be implemented in firmware functions, especially those dealing with untrusted data.

Disclaimer 📝

This tool is for educational purposes only. Do not attempt to use it for malicious intent. Always seek proper authorization before conducting security testing.