LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. Versions 25.12.0 and below have a Time-Based Blind SQL Injection vulnerability in address-search.inc.php via the address parameter. When a crafted subnet prefix is supplied, the prefix value is concatenated directly into an SQL query without proper parameter binding, allowing an attacker to manipulate query logic and infer database information through time-based conditional responses. This vulnerability requires authentication and is exploitable by any authenticated user. This issue has been fixedd in version 26.2.0.
Affected: Packagist: librenms/librenms
### Summary A time-based blind SQL injection vulnerability exists in `address-search.inc.php` via the `address` parameter. When a crafted subnet prefix is supplied, the prefix value is concatenated directly into an SQL query without proper parameter binding, allowing an attacker to manipulate query logic and infer database information through time-based conditional responses.
### Details This vulnerability requires authentication and is exploitable by any authenticated user.
The vulnerable endpoint is at `/ajax_table.php` with the following request displaying the injection point. ``` POST /ajax_table.php HTTP/1.1 Host: 192.168.236.131 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:140.0) Gecko/20100101 Firefox/140.0 Accept: */* Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate, br Content-Type: application/x-www-form-urlencoded; charset=UTF-8 Origin: http://192.168.236.131 Connection: keep-alive Referer: http://192.168.236.131/search Cookie: laravel_session=[Authenticated user cookie]
current=1&rowCount=55&sort%5Bhostname%5D=asc&searchPhrase=&id=address-search&search_type=ipv4&device_id=1&interface=&address=127.0.0.1/aa<injected SQL here> ```
Within `includes/html/table/address-search.inc.php`, the user-controlled `$prefix` variable derived from the `address` parameter is concatenated directly into the SQL query without sanitization or parameter binding on lines 34 and 52.
```php // Lines 16-35, 51-53 $address = $vars['address'] ?? ''; $prefix = ''; $sort…