Re: XFree86 3.3.2's setup tool /tmp race

From: Steve Bellovin (smbat_private)
Date: Mon Nov 09 1998 - 09:29:06 PST

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    In message <Pine.LNX.4.03.9811081750370.13094-100000at_private>, Adrian Voin
    ea writes:
    > Hello,
    >
    > XFree86 3.3.2's setup tool 'xf86config', when it runs 'X -probeonly
    > -pn -xf86config /tmp/XF86Config.tmp' creates 2 files with mode 644 in
    > /tmp, XF86Config.tmp and dumbconfig.2 and then erases them:
    >
    
    ...
    
    Etc.
    
    Is this really a problem?  On my system, at least (BSD/OS 4.0),
    xf86config isn't setuid, so there's only an issue if someone privileged
    runs it.  (If that's not the case, then there's a deeper underlying
    security problem.)  And xf86config is the sort of program that one
    would run when a machine is being set up, not when it's open to general
    users.
    



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