Re: Globetrotter FlexLM 'lmdown' bogosity

From: Kemasa (kemasaat_private)
Date: Sun Sep 27 1998 - 11:33:32 PDT

  • Next message: Brett Glass: "Re: 1+2=3, +++ATH0=Old school DoS"

    >From: Valdis.Kletnieksat_private
    >...
    >Well, here's an oldie but goodie, which we first saw at least 3 years
    >ago.  Lo and behold, it's apparently STILL broken.  Sorry, no vendor
    >notification - we told them 3 years ago. ;)
    >
    >FlexLM 'lmdown' command will chow your license server from anywhere on
    >the Internet - all you need is a copy of the license file.  The
    >authentication appears to be "Well, you appear to be root on the
    >machine that you typed 'lmdown' on".
    
    Have you looked at the switch options for lmgrd? If you had you
    would find that there is an option to limit the ability to take
    down the license daemons to a specific group, which basically
    stops what you are talking about. I think it is also possible
    to completely ignore a lmdown command since it would be possible
    to try all possible group ids.
    
    It is a bit of a problem that they set it up that way by default
    and since you need not run it as root, you should change the
    owner to something else, change the options and a clean up
    the way the log files work.
    
    You DO have the option of changing the functionality though,
    so you really can't blame them for your not looking at the
    man pages on the program.
    
    
    
                                                     Kemasa.
    



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