nelze 'odevzdat' soubor?

[uhlar na fantomas.sk]

Peter Surda <shurdeek na panorama.sth.ac.at> wrote:
->> tak si predstavte ze mate na /home quotu - standartni vec a pak user1 
->> udela:
->> 
->> cat /dev/urandom > ~/divny_soubor_aby_ho_user2_nenasel.bin
->> chown user2 ~/divny_soubor_aby_ho_user2_nenasel.bin
-> No a predstav si, ze spravis ako user:

-> echo '#!/usr/bin/suidperl \
-> system "bash";' > diera.pl
-> chmod 4755 diera.pl
-> chown root diera.pl
-> ./diera.pl
-> rm -rf /

-> A mame tu dalsi dovod, preco je spravne, ze to nefunguje :-)

vacsina UN*Xov po chowne (hoci rootovom) resetuje setuid. Asi vedia preco.
-- 
 Matus "fantomas" Uhlar, uhlar na fantomas.sk ; http://www.fantomas.sk/
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