Re: visible passwd bug in kdm ?

From: J. Sean Connell (ankhat_private)
Date: Sun Dec 14 1997 - 16:59:40 PST

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    On Wed, 10 Dec 1997, Sascha Runschke wrote:
    
    > it seems that there is a bug in the login procedure of the kdm environment.
    > If you type your passwd when prompted for it and afterwards try to mark the
    > invisible passwd with the mouse, it suddenly becomes visible.
    >
    > I don't think it's that dangerous, but there might be a situation where you
    > cannot end your login-sequence and someone else is able to access your
    > station.
    >
    > I did not check the code yet, because I do not use kdm. But maybe
    > I'll have a look later.
    
    I don't know about this exact problem, but there is a generic problem with
    Qt in this regard: A text entry field that has been set to "password" mode
    still permits selection (and therefore copying) of the plaintext contents.
    I spoke with Arnt Gulbrandsen at Troll Tech about this after discovering it
    myself while working on a nice GUI s/key calculator (email me if you're
    interested). I can't remember what he said about why it was that way, but
    after I pointed out that while under Windows inadvertent selection does not
    cause copy, it *does* under X - which makes accidentally pasting your
    password into the wrong window (or even having someone snoop it out of your
    server - yeah, this is rather unrealistic ;) trivially easy. He concurred
    and mumbled something about it being fixed in 1.4 or so.
    
    Please note that I have no connection with Troll Tech other than being a
    personal friend of Arnt's, and that anything in the preceding paragraph
    could be wrong.  Arnt, further comment from the proverbial horse's
    mouth? (And please don't shoot me ;)
    
    --
    J. S. Connell      | Systems Adminstrator, ICONZ.  Any opinions stated above
    ankhat_private | are not my employers', not my boyfriends', my God's, my
    ankhat_private   | friends', and probably not even my own.
    -------------------+---------------------------------------------------------
                PGP key at http://www.canuck.gen.nz/~ankh/pgpkey.html
    



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