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authorTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-11-04 12:06:08 -0500
committerTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-11-04 12:06:08 -0500
commit1b6efb141bcf333e5c73a520e701d1de8cafcf4e (patch)
tree2c8231c62e760299a8109716eecf4647514b3315 /ubuntu/maverick/tdeutils/debian/klaptopdaemon.README.Debian
parenta2c2f2ed2eaad5d897c9a00ff5d804486751e603 (diff)
downloadtde-packaging-1b6efb141bcf333e5c73a520e701d1de8cafcf4e.tar.gz
tde-packaging-1b6efb141bcf333e5c73a520e701d1de8cafcf4e.zip
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+klaptopdaemon and SUID permissions
+----------------------------------
+
+To allow ordinary users to control certain power management features,
+klaptopdaemon's panel in the KDE Control Center has a button which prompts
+the user to enter the root password (KDE Control Center --> Power Control
+--> Laptop Battery, then the ACPI Config tab, then the Setup Helper
+Application button). This button changes the permissions of
+/usr/bin/klaptop_acpi_helper from "0755 root.root" to "6755 root.root",
+and therefore grants all regular users extra power management abilities.
+This has obvious security implications, and should not be done on any
+system where all users are not trusted absolutely.
+
+The standard klaptopdaemon changes the binary's permissions using chmod.
+However, if an updated version of the Debian klaptopdaemon package
+were then to be installed, it would reset the permissions, forcing the
+sysadmin to reconfigure after each upgrade.
+
+The Debian package has therefore been patched to use dpkg-statoverride to
+permanently change the permissions of /usr/bin/klaptop_acpi_helper. The
+override is removed and permissions reset if the package is removed or
+purged. However, if the sysadmin wishes to remove the special permissions
+of /usr/bin/klaptop_acpi_helper, they can do so at any time by issuing,
+as root, the following commands:
+
+dpkg-statoverride --remove /usr/bin/klaptop_acpi_helper
+chown root:root /usr/bin/klaptop_acpi_helper
+chmod 0755 /usr/bin/klaptop_acpi_helper