node-tar is a Tar for Node.js. node-tar prior to version 6.2.1 has no limit on the number of sub-folders created in the folder creation process. An attacker who generates a large number of sub-folders can consume memory on the system running node-tar and even crash the Node.js client within few seconds of running it using a path with too many sub-folders inside. Version 6.2.1 fixes this issue by preventing extraction in excessively deep sub-folders.
node-tar es un Tar para Node.js. Node-tar anterior a la versión 6.2.1 no tiene límite en la cantidad de subcarpetas creadas en el proceso de creación de carpetas. Un atacante que genera una gran cantidad de subcarpetas puede consumir memoria en el sistema que ejecuta node-tar e incluso bloquear el cliente Node.js a los pocos segundos de ejecutarlo usando una ruta con demasiadas subcarpetas dentro. La versión 6.2.1 soluciona este problema impidiendo la extracción en subcarpetas excesivamente profundas.
A flaw was found in ISAACS's node-tar, where it is vulnerable to a denial of service, caused by the lack of folder count validation. The vulnerability exists due to the application not properly controlling the consumption of internal resources while parsing a tar file. By sending a specially crafted request, a remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.
