This also means all variables registered by PHP from $\_GET, $\_FILES and $\_COOKIE arrays will not be destroyed.īy the same token, when $\_POST, $\_FLIES, or $\_COOKIE is sent, unset\_globals() will destroy $GLOBALS array, then the corresponding global variables registered by PHP will not be destroyed. This means that the binding between the $GLOBALS array and the global symbol table will be broken because $GLOBALS array has been destroyed. $GLOBALS array is a automatic global variable, and binding with global symbol table, you can use $GLOBALS to access or control a global variable in all scopes throughout a script. This means $GLOBALS array will be destroyed. ![]() When $\_GET=1 is sent, unset\_globals() will destroy $GLOBALS. ![]() ![]() This also means all global variables registered by PHP from $\_COOKIE array will be destroyed because them will not be handled by unset().īy the same token, if $\_GET or $\_FILES array was destroyed via unset\_globals(), the corresponding global variables registered by PHP will not be destroyed. This means $\_COOKIE array will be destroyed. Unset($GLOBALS) // Double unset to circumvent the zend_hash_del_key_or_index hole in PHP unset_globals($_GET) When PHP's register\_globals configuration set on, MyBB will call unset\_globals() function, all global variables registered by PHP from $\_POST, $\_GET, $\_FILES, and $\_COOKIE arrays will be = 1) MyBB's unset_globals() function can be bypassed under special conditions and it is possible to allows remote code execution.
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