CVE-2019-9949

Western Digital My Cloud Cloud, Mirror Gen2, EX2 Ultra, EX2100, EX4100, DL2100, DL4100, PR2100 and PR4100 before firmware 2.31.183 are affected by a code execution (as root, starting from a low-privilege user session) vulnerability. The cgi-bin/webfile_mgr.cgi file allows arbitrary file write by abusing symlinks. Specifically, this occurs by uploading a tar archive that contains a symbolic link, then uploading another archive that writes a file to the link using the "cgi_untar" command. Other commands might also be susceptible. Code can be executed because the "name" parameter passed to the cgi_unzip command is not sanitized.

Western Digital My Cloud Cloud, Mirror Gen2, EX2 Ultra, EX2100, EX4100, DL2100, DL4100, PR2100 and PR4100 before firmware 2.31.183 are affected by a code execution (as root, starting from a low-privilege user session) vulnerability. The cgi-bin/webfile_mgr.cgi file allows arbitrary file write by abusing symlinks. Specifically, this occurs by uploading a tar archive that contains a symbolic link, then uploading another archive that writes a file to the link using the "cgi_untar" command. Other commands might also be susceptible. Code can be executed because the "name" parameter passed to the cgi_unzip command is not sanitized.

Western Digital My Cloud Cloud, Mirror Gen2, EX2 Ultra, EX2100, EX4100, DL2100, DL4100, PR2100 y PR4100 antes del firmware versión 2.31.183 se ven afectados por una ejecución de código (as root, starting from a low-privilege user session). El archivo cgi-bin/webfile_mgr.cgi permite la escritura arbitraria de archivos al abusar de los symlinks. Específicamente, esto ocurre al cargar un archivo "tar" que contiene un enlace simbólico, y después cargar otro archivo que escribe un archivo en el enlace usando el comando "cgi_untar". Otros comandos también pueden ser susceptibles. El código puede ser ejecutado porque el parámetro "nombre" pasó hacia el comando cgi_unzip sin estar saneado.