Re: in.telnetd bug (linux)

From: Ian R. Justman (ianjat_private)
Date: Thu Nov 27 1997 - 17:00:12 PST

  • Next message: Aaron Campbell: "Re: in.telnetd bug (linux)"

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    On Tue, 25 Nov 1997, kgb wrote:
    
    > This is my first bugtraq post, If Linux in.telnetd is _supposed_ to do
    > this or everyone already knows it does so, I hope Aleph1 doen't let it
    > though the list. :-)
    >
    > This look's harmless, however it does not look like it should be
    > 'acceptable' Heres the info on the bug:
    >
    > If you your 'TERM' variable to anythig that the telnet server your
    > telnetting to does _not_ have in the terminfo database, in.telnetd
    > coredumps. (leaving a core in /) This core file is dropped with safe
    > permissions so only root could read it, and there is nothing that I can
    > see 'dangerous' left in it for anyone to read.
    >
    > This does not appear to affect in.telnetd from some distributions.
    > The distribution I did find affected is slackware 3.4.
    
    I tried this on my Slackware 3.3 system at home, so it's safe to assume
    that it affects prior versions of Slackware.
    
    Since I don't use Red Hat, I can only assume either:
    
    A.  They've corrected a bug in the in.telnetd (assuming they're using the
    same code base in this one) that comes with the NetKit distribution of
    in.telnetd
    
    B.  They use a completely different telnetd from a different "NetKit"
    
    C.  Tying partially into B, they wrote their own.
    
    Likewise, I don't see how anyone could exploit this one.
    
    - --Ian.
    
    - ---
    Ian R. Justman (ianjat_private)
    CalWeb Internet Services Technical Support Team
    Finger ianjat_private for my public PGP key.
    
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