An issue was discovered in libraries/common.inc.php in phpMyAdmin 4.0 before 4.0.10.20, 4.4.x, 4.6.x, and 4.7.0 prereleases. The restrictions caused by $cfg[Servers][$i][AllowNoPassword] = false are bypassed under certain PHP versions (e.g., version 5). This can allow the login of users who have no password set even if the administrator has set $cfg[Servers][$i][AllowNoPassword] to false (which is also the default). This occurs because some implementations of the PHP substr function return false when given as the first argument.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Phpmyadmin | Phpmyadmin | 4.0.0 (including) | 4.0.10.20 (excluding) |
| Phpmyadmin | Ubuntu | esm-apps/xenial | * |
| Phpmyadmin | Ubuntu | trusty | * |
| Phpmyadmin | Ubuntu | trusty/esm | * |
| Phpmyadmin | Ubuntu | upstream | * |
| Phpmyadmin | Ubuntu | xenial | * |