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From: Matt Nichols (kgbat_private)
Date: Tue Mar 10 1998 - 18:05:56 PST

  • Next message: Alvaro Martinez Echevarria: "DoS (and possibly more) on MDaemon for NT/95"

    Problem: 'netconfig' script on slackware 3.4 systems (probably earlier
    versions also) , does not check to see if static tmpfiles already exist.
    Any user can overwrite system files by creating a symlink in /tmp under a
    filename used by 'netconfig'
    
    netconfig creates: (without checking to see if they exist)
    /tmp/elm.rc.OLD
    /tmp/rc.inet1.OLD
    /tmp/hosts.OLD
    /tmp/resolv.conf.OLD
    
    a user can create a symlink in /tmp like:
    lwrxrwxrwx   1 kgb   users    8 Mar 10 19:47 rc.inet1.OLD -> /vmlinuz
    
    and wait for root to run 'netconfig' thus overwriting the victom file.
    Although this is an unlikely situation, it is still possible.
    
         -  MultiSynk -
     k g b @ f l e x . n e t
    



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