Directory traversal vulnerability in the disk_create function in disk.c in rdesktop before 1.7.0, when disk redirection is enabled, allows remote RDP servers to read or overwrite arbitrary files via a .. (dot dot) in a pathname.
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.