10.0
10.1
11.0
11.1
11.2
11.3
12.0
12.1
6.0
6.1
6.2
6.2.0
6.2.0-rc1
6.2.0-rc2
6.3
6.3-rc1
6.3-rc2
6.3-rc3
7.10
7.4
7.5
7.6
7.6-blfs
7.6-systemd
7.7
7.8
7.9
8.0
8.1
8.2
8.3
8.4
9.0
9.1
basic
bdubbs/svn
elogind
gnome
kde5-13430
kde5-14269
kde5-14686
kea
ken/TL2024
ken/inkscape-core-mods
ken/tuningfonts
krejzi/svn
lazarus
lxqt
nosym
perl-modules
plabs/newcss
plabs/python-mods
python3.11
qt5new
rahul/power-profiles-daemon
renodr/vulkan-addition
systemd-11177
systemd-13485
trunk
upgradedb
v5_0
v5_0-pre1
v5_1
v5_1-pre1
xry111/intltool
xry111/llvm18
xry111/soup3
xry111/test-20220226
xry111/xf86-video-removal
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Last change
on this file since 0d2f891 was 6998c44a, checked in by Larry Lawrence <larry@…>, 21 years ago |
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chapter 19
git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@1197 af4574ff-66df-0310-9fd7-8a98e5e911e0
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| 1 | <sect2>
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| 2 | <title>Command explanations</title>
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| 3 |
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| 4 | <para><screen><command>sed 's/-o bin/-o root/'...</command></screen>
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| 5 | Adjusts the <filename>Makefile</filename> so that the program is installed
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| 6 | with user root instead of user bin (which doesn't exist on a default
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| 7 | <acronym>LFS</acronym> system).</para>
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| 8 |
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| 9 | <para><command>make install</command> : Installs <command>traceroute</command>
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| 10 | setuid root in the <filename>/usr/sbin</filename> directory. This makes it
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| 11 | possible for all users to execute <command>traceroute</command>. For absolute
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| 12 | security, turn off the setuid bit in <command>traceroute</command>'s file
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| 13 | permissions with the command:
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| 14 | <screen><command>chmod 0755 /usr/sbin/traceroute</command></screen></para>
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| 15 |
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| 16 | <para>The risk is that if a security problem such as a buffer overflow were
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| 17 | ever found in the <application>Traceroute</application> code, a regular user
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| 18 | on your system could gain root access if the program is setuid root. Removing
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| 19 | the setuid permission of course also makes it impossible for users other than
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| 20 | root to utilize <command>traceroute</command>, so decide what's right for your
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| 21 | individual situation.</para>
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| 22 |
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| 23 | <para>Now, to be completely <acronym>FHS</acronym> compliant, as is our aim, if
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| 24 | you do leave the <command>traceroute</command> binary setuid root, then you
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| 25 | should move <filename>traceroute</filename> to <filename>/usr/bin</filename>
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| 26 | with the following command:
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| 27 | <screen><command>mv /usr/sbin/traceroute /usr/bin</command></screen></para>
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| 28 |
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| 29 | <para>This ensures that the binary is in the path for non-root users.</para>
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| 30 |
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| 31 | </sect2>
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| 32 |
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