The _zval_get_long_func_ex in Zend/zend_operators.c in PHP 7.1.2 allows attackers to cause a denial of service (NULL pointer dereference and application crash) via crafted use of declare(ticks= in a PHP script. NOTE: the vendor disputes the classification of this as a vulnerability, stating Please do not request CVEs for ordinary bugs. CVEs are relevant for security issues only.
A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Php | Php | 7.1.2 (including) | 7.1.2 (including) |