CVE-2017-17434

El demonio en rsync 3.1.2 y 3.1.3-development en versiones anteriores a la 2017-11-03 no busca nombres de archivo fnamecmp en la estructura de datos daemon_filter_list (en la función recv_files en receiver.c) y tampoco aplica el mecanismo de protección sanitize_paths a los nombres de ruta hallados en cadenas "xname follows" (en la función read_ndx_and_attrs en rsync.c). 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.