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CVE-2017-8336

Estado: ModificadaAlta (8.8)—

An issue was discovered on Securifi Almond, Almond+, and Almond 2015 devices with firmware AL-R096. The device provides a user with the capability of adding new routes to the device. It seems that the POST parameters passed in this request to set up routes on the device can be set in such a way that would result in overflowing the stack set up and allow an attacker to control the $ra register stored on the stack. If the firmware version AL-R096 is dissected using binwalk tool, we obtain a cpio-root archive which contains the filesystem set up on the device that contains all the binaries.

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The binary "goahead" is the one that has the vulnerable function that recieves the values sent by the POST request. If we open this binary in IDA-pro we will notice that this follows a MIPS little endian format. The function sub_00420F38 in IDA pro is identified to be receiving the values sent in the POST request. The POST parameter "gateway" allows to overflow the stack and control the $ra register after 1546 characters. The value from this post parameter is then copied on the stack at address 0x00421348 as shown below. This allows an attacker to provide the payload of his/her choice and finally take control of the device.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (3)

Securifi — Almond+firmwareSecurifi — Almond 2015 FirmwareSecurifi — Almond Firmware

CWE

Referencias

JSON original (NVD)

Mostrar
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      "lang": "en",
      "value": "An issue was discovered on Securifi Almond, Almond+, and Almond 2015 devices with firmware AL-R096. The device provides a user with the capability of adding new routes to the device. It seems that the POST parameters passed in this request to set up routes on the device can be set in such a way that would result in overflowing the stack set up and allow an attacker to control the $ra register stored on the stack. If the firmware version AL-R096 is dissected using binwalk tool, we obtain a cpio-root archive which contains the filesystem set up on the device that contains all the binaries. The binary \"goahead\" is the one that has the vulnerable function that recieves the values sent by the POST request. If we open this binary in IDA-pro we will notice that this follows a MIPS little endian format. The function sub_00420F38 in IDA pro is identified to be receiving the values sent in the POST request. The POST parameter \"gateway\" allows to overflow the stack and control the $ra register after 1546 characters. The value from this post parameter is then copied on the stack at address 0x00421348 as shown below. This allows an attacker to provide the payload of his/her choice and finally take control of the device."
    },
    {
      "lang": "es",
      "value": "Se descubrió un problema en los dispositivos Securifi Almond, Almond + y Almond 2015 con firmware AL-R096. El dispositivo proporciona al usuario la capacidad de agregar nuevas rutas al dispositivo. Parece que los parámetros POST pasados ??en esta solicitud para configurar rutas en el dispositivo se pueden configurar de tal manera que resulte en desbordar la configuración de la pila y permitir que un atacante controle el registro $ra almacenado en la pila. Si la versión de firmware AL-R096 se disecciona con la herramienta binwalk, obtenemos un archivo cpio-root que contiene el sistema de archivos configurado en el dispositivo que contiene todos los archivos binarios. El binario \"goahead\" es el que tiene la función vulnerable que recibe los valores enviados por la solicitud POST. Si abrimos este binario en IDA-pro, notaremos que esto sigue un formato MIPS little endian. La función sub_00420F38 en IDA pro está identificada para recibir los valores enviados en la solicitud POST. El parámetro POST \"gateway\" permite desbordar la pila y controlar el registro $ra después de 1546 caracteres. El valor de este parámetro posterior se copia en la pila en la dirección 0x00421348 como se muestra a continuación. Esto permite que un atacante proporcione la carga útil de su elección y finalmente tome el control del dispositivo"
    }
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  "lastModified": "2026-06-17T01:26:12.200",
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