https://www.systemtek.co.uk/2019/03/php-exif-exif_process_ifd_in_makernote-maker_note-offset-mishandling-arbitrary-code-execution-vulnerability-cve-2019-9638/
PHP EXIF exif_process_IFD_in_MAKERNOTE maker_note->offset Mishandling Arbitrary Code Execution Vulnerability [CVE-2019-9638]