cons.saver in Midnight Commander (mc) 4.5.42 and earlier does not properly verify if an output file descriptor is a TTY, which allows local…

cons.saver in Midnight Commander (mc) 4.5.42 and earlier does not properly verify if an output file descriptor is a TTY, which allows local users to corrupt files by creating a symbolic link to the target file, calling mc, and specifying that link as a TTY argument.