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La funci\u00f3n interna Curl_ntlm_core_mk_nt_hash multiplica la longitud de la contrase\u00f1a por dos (SUM) para adivinar qu\u00e9 tama\u00f1o debe tener la zona de almacenamiento temporal que se va a asignar desde la memoria din\u00e1mica (heap). El valor de longitud se emplea a continuaci\u00f3n para iterar sobre la contrase\u00f1a y generar una salida en el b\u00fafer de almacenamiento asignado. En sistemas con un size_t de 32 bits, la matem\u00e1tica para calcular SUM desencadena un desbordamiento de enteros cuando la contrase\u00f1a excede los 2 GB (2^31 bytes). Este desbordamiento de enteros suele provocar que un b\u00fafer muy peque\u00f1o se asigne en lugar del planeado (uno muy grande), por lo que su uso termina con un desbordamiento de b\u00fafer basado en memoria din\u00e1mica (heap). 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