Add PoC exploit for CVE-2023-27997

[postmodern]

Add a PoC exploit for CVE-2023-27997, a heap-overflow in FortiOS.

Reference PoCs

• https://github.com/lexfo/xortigate-cve-2023-27997/blob/main/exploit.py
• https://github.com/delsploit/CVE-2023-27997/blob/main/exploit.py (multiple files)
• https://github.com/imbas007/CVE-2023-27997-Check/blob/main/CVE-2023-27997.py (check only, no exploit/payload)
• https://github.com/BishopFox/CVE-2023-27997-check/blob/main/CVE-2023-27997-check.py (check only, no exploit/payload)
• https://github.com/rio128128/CVE-2023-27997-POC/blob/main/CVE-2023-27997.py

Vuln App

N/A

How to Submit a PoC

See the CONTRIBUTING file for instructions on how to submit a PoC exploit.