In Infinera TNMS (Transcend Network Management System) 19.10.3, an insecure default configuration of the internal SFTP server on Linux servers allows remote attacker to access files and directories outside the SFTP user home directory.
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.