> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/es/web-vulnerabilities/sql-truncation-attack/sql-truncation-registration-pentesting-web.md).

# Registro con truncamiento SQL

## Truncamiento SQL:

Aquí está el **lista de direcciones de correo electrónico** deberíamos intentar acceder a:

<figure><img src="/files/33a12c8fdd53b38df4350a1253cae03ba45fab30" alt=""><figcaption></figcaption></figure>

En el panel de registro, si intentamos **insertar** una dirección de correo electrónico, indica que el usuario ya existe:

<figure><img src="/files/3f0207ab6eef6070c3473073977a32809408c9dc" alt=""><figcaption></figcaption></figure>

Vemos en el código HTML que el **base de datos** limita el número de caracteres a 13:

<figure><img src="/files/bccd9bcab0e0258681156b4c845950f06758626e" alt=""><figcaption></figcaption></figure>

Ingresamos la dirección de correo electrónico con espacios y un carácter adicional, modificando también el **maxlength** en el código HTML a un número mayor para permitirnos escribir:

<figure><img src="/files/d397c06034813009a7fe718df811da09ea8e494f" alt=""><figcaption></figcaption></figure>

Logramos **registro** con el nombre de usuario Jacob, porque lo que sucedió es que el correo electrónico ha sido **truncado**. Esto es lo que entendemos por truncamiento de espacios al final de la cadena: es la eliminación automática de estos espacios.

<figure><img src="/files/5bd6357507f5de7cbec6066c5687311f3905c279" alt=""><figcaption></figcaption></figure>


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