Comment # 11 on bug 1054448 from Erico Rolinski

(In reply to Ladislav Slez�k from comment #1)
> I found out that the problem is caused by updated terminfo-base package,
> when I copy the /usr/share/terminfo/x/xterm from openSUSE 42.2 then it works
> correctly.
> (I guess 42.3 or SLES12-SP3 should work as well.)
> 
> The workaround is to run yast with TERM=linux (or something else, depending
> on the terminal used), in an SSH installation use "TERM=linux yast.ssh"
> command for starting the installer.
> 
> 
> Changing the component to Basesystem as the problem seems to in the
> /usr/share/terminfo/x/xterm file in terminfo-base package (ncurses source
> RPM).

Thank you Ladislav.

The term "xterm-color" works correctly too.

Put alias for sudo and yast in "~/.alias" or "~/.bashrc" file:

alias sudo='sudo '
alias yast='TERM=xterm-color yast'