BIT-LIBPHP-2020-7065 mb_strtolower (UTF-32LE): stack-buffer-overflow at php_unicode_tolower_full

In PHP versions 7.3.x below 7.3.16 and 7.4.x below 7.4.4, while using mbstrtolower function with UTF-32LE encoding, certain invalid strings could cause PHP to overwrite stack-allocated buffer. This could lead to memory corruption, crashes and potentially code execution...