Re: [RHSA-1999:028-01] Buffer overflow in libtermcap tgetent()

[Martin Schulze]

Michal Zalewski wrote:
> Well, as this vunerability become well-known, I have nothing to loose,
> enjoy: most of terminfo-based programs will accept TERM variable set to
> eg. '../../../tmp/x'. All we have to do is to provide 'our own termcap
> file', set TERM, then execute vunerable program w/terminfo support. In
> fact, in.telnetd daemon shipped eg. with RH 6.0 /as well as with many
> other recent distributions based on terminfo entries/, is vunerable... And
> TERM variable can be passed using telnet ENVIRON option during protocol
> negotiation before login procedure... Guess what?;) Almost remote root
> (well, all you have to do locally is puting /tmp/x).

Are you referring to terminfo or termcap?  They are designed differently,
refer to different files and use different code.

Regards,

        Joey

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