From: arisawa@ar.aichi-u.ac.jp
To: 9fans@cse.psu.edu
Subject: Re: [9fans] remove files in /srv
Date: Tue, 1 Feb 2005 12:21:01 +0900 [thread overview]
Message-ID: <cdf66062dc74a3eff846afad1134a3fe@ar.aichi-u.ac.jp> (raw)
In-Reply-To: <05b7ca7e8285696ad011d8d8b359dc20@orthanc.cc.titech.ac.jp>
>Anyone can replace files in /srv. Bad things won't
>happen if /srv/boot has been replaced by a malicious user?
Try:
term% cd /srv
term% ls -ld /srv
d-r-xr-xr-x s 0 arisawa arisawa 0 Oct 26 20:44 /srv
term% ls -l
--rw-rw-rw- s 0 arisawa arisawa 0 Oct 26 20:44 boot
--rw-rw-rw- s 0 arisawa arisawa 0 Oct 26 20:44 cs
--rw-rw-rw- s 0 arisawa arisawa 0 Oct 26 20:44 dns
--rw------- s 0 arisawa arisawa 0 Oct 26 20:44 dos
--rw------- s 0 arisawa arisawa 0 Oct 26 20:44 f
--rw-rw-rw- s 0 arisawa arisawa 0 Oct 26 20:44 factotum
--rw-rw-rw- s 0 arisawa arisawa 0 Oct 26 20:44 fossil
--rw------- s 0 arisawa arisawa 0 Oct 26 20:44 fscons
--rw------- s 0 arisawa arisawa 0 Oct 26 20:44 nfsserver.chat
--rw------- s 0 arisawa arisawa 0 Oct 26 20:44 pc
--rw------- s 0 arisawa arisawa 0 Oct 26 20:44 plumb.arisawa.199
--rw------- s 0 arisawa arisawa 0 Oct 26 20:44 portmapper.chat
--rw------- s 0 arisawa arisawa 0 Oct 26 20:44 rio.arisawa.44
--rw------- s 0 arisawa arisawa 0 Oct 26 20:44 riowctl.arisawa.44
term% su alice
su# rm boot
rm: boot: permission denied
su# echo bla | /srv/boot
/srv/boot: permission denied
su# cp fossil boot
cp: can't create boot: srv file already exists
su#
Kenji Arisawa
.
next prev parent reply other threads:[~2005-02-01 3:21 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-02-01 1:11 YAMANASHI Takeshi
2005-02-01 3:21 ` arisawa [this message]
2005-02-01 3:56 ` Russ Cox
2005-02-01 3:48 YAMANASHI Takeshi
2005-02-01 4:06 ` arisawa
2005-02-01 4:33 ` Russ Cox
2005-02-01 20:31 ` rog
2005-02-02 23:22 ` Bruce Ellis
2005-02-02 23:57 ` Charles Forsyth
2005-02-01 4:05 YAMANASHI Takeshi
2005-02-01 4:44 ` geoff
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