X-Diesel Unreal Commander 0.92 build 565 and 573 does not properly react to an FTP server's behavior after sending a "CWD /" command, which allows remote FTP servers to cause a denial of service (infinite loop) by (1) repeatedly sending a 550 error response, or (2) sending a 550 error response and then disconnecting.
Improper Input Validation The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly.