The array_user_key_compare function in PHP 4.4.6 and earlier, and 5.x up to 5.2.1, makes erroneous calls to zval_dtor, which triggers memory corruption and allows local users to bypass safe_mode and execute arbitrary code via a certain unset operation after array_user_key_compare has been called.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Php | Php | * | 4.4.6 (including) |
| Php | Php | 5.0.0 (including) | 5.2.1 (including) |
| Php5 | Ubuntu | dapper | * |
| Php5 | Ubuntu | edgy | * |
| Php5 | Ubuntu | feisty | * |
| Php5 | Ubuntu | upstream | * |