CVE-2017-17433

La función recv_files en receiver.c en el demonio en rsync 3.1.2 y 3.1.3-development en versiones anteriores a la 2017-11-03 continúa ciertas actualizaciones de metadatos de archivos antes de buscar un nombre de archivo en la estructura de datos daemon_filter_list. Esto permite que atacantes remotos omitan las restricciones de acceso planeadas.

It was discovered that rsync proceeds with certain file metadata updates before checking for a filename. An attacker could use this to bypass access restrictions. It was discovered that rsync does not check for fnamecmp filenames and also does not apply the sanitize_paths protection mechanism to pathnames. An attacker could use this to bypass access restrictions. Various other issues were also addressed.