| Commit message (Collapse) | Author | Age |
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…g.config (#3333).
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firejail can blacklist (and now also whitelist) files based on glob
pattern. This pattern is evaluated at firejail start, and not updated
at run time. This patch documents this behavior.
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Delete two unused variables.
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See discussion in https://github.com/netblue30/firejail/pull/3326.
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This patch also allows setting the DBus policies to filter even if
xdg-dbus-proxy is not installed. In that case, unrestricted access to the bus is
allowed, but a warning is emitted.
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To avoid race conditions, the proxy sockets from /run/firejail/dbus/ are
bind-mounted to /run/firejail/mnt/dbus/, which is controlled by root.
Instead of relying on the default locations of the DBus sockets, the environment
variables DBUS_SESSION_BUS_ADDRESS and DBUS_SYSTEM_BUS_ADDRESS are set
accordingly.
User sockets are tried in the following order when starting the proxy:
* DBUS_SESSION_BUS_ADDRES
* /run/user/<pid>/bus
* /run/user/<pid>/dbus/user_bus_socket
These are all blocked (including DBUS_SESSION_BUS_ADDRESS if it points at a
socket in the filesystem) when the filtering or blocking policy is active.
System sockets are tried in the following order:
* DBUS_SYSTEM_BUS_ADDRESS
* /run/dbus/system_bus_socket
These are all blocked (including DBUS_SYSTEM_BUS_ADDRESS if it points at a
socket in the filesystem) when the filtering or blocking policy is active.
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The options --dbus-user.talk, --dbus-user.own, --dbus-system.talk, and
--dbus-system.own control which names can be accessed and owned on the user and
system buses.
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* The proxy is forked off outside the sandbox namespace to protect the
fds of the original buses from the sandboxed process.
* The /run/firejail/dbus directory (with the sticky bit set) holds the proxy
sockets. The sockets are <parent pid>-user and <parent pid>-system for the
user and system buses, respectively. Each socket is owned by the sandbox user.
* The sockets are bind-mounted over their expected locations and the
/run/firejail/dbus directory is subsequently hidden from the sandbox.
* Upon sandbox exit, the xdg-dbus-proxy instance is terminated and the sockets
are cleaned up.
* Filter rules will be added in a future commit.
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To contain processes forked for long time, such as the xdg-dbus-proxy,
sbox_exec_v can be used, which is the non-forking version of sbox_run_v.
Additionally, the SBOX_KEEPS_FDS flag avoid closing any open fds,
so fds needed by the subordinate process can be left open before calling
sbox_exec_v.
This flag does not makes sense for sbox_run_v, and causes an assertion failure.
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Allow setting a separate policy for the user and system buses.
For now, the filter policy is equivalent to the none (block) policy.
Future commits will add more configuration options and filters.
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Let user specify the action when seccomp filters trigger:
- errno name like EPERM (default) or ENOSYS: return errno and let the process continue.
- 'kill': kill the process as previous versions
The default action is EPERM, but killing can still be specified with
syscall:kill syntax or globally with seccomp-error-action=kill. The
action can be also overridden /etc/firejail/firejail.config file.
Not killing the process weakens Firejail slightly when trying to
contain intrusion, but it may also allow tighter filters if the
only alternative is to allow a system call.
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If `less` is sandboxed, then we get a similar message to below
when calling `man <anything>`
Error clone: main.c:2743 main: Operation not permitted
man: command exited with status 1: sed -e '/^[[:space:]]*$/{ N; /^[[:space:]]*\n[[:space:]]*$/D; }' | LESS=-ix8RmPm Manual page grep(1) ?ltline %lt?L/%L.:byte %bB?s/%s..?e (END):?pB %pB\%.. (press h for help or q to quit)$PM Manual page grep(1) ?ltline %lt?L/%L.:byte %bB?s/%s..?e (END):?pB %pB\%.. (press h for help or q to quit)$-R MAN_PN=grep(1) less
See also
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=899143
https://github.com/netblue30/firejail/issues/1856
Noticed on Debian 10, firejail 0.9.63
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Simple sanity checks for arguments and environment
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Restrict number of program arguments and their length as well as
number of environment variables and their length.
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- fix description
- add gnome-klotski, five-or-more, swell-foop
[skip ci]
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- blobwars
- gravity-beams-and-evaporating-stars
- hyperrogue
- jumpnbump-menu (alias)
- jumpnbump
- magicor
- mindless
- mirrormagic
- mrrescue
- scorched3d-wrapper (alias)
- scorchwentbonkers
- seahorse-adventures
- wordwarvi
- xbill
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Preserve CFLAGS given to configure in common.mk.in
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- four-in-a-row
- gnome-mahjongg
- gnome-robots
- gnome-sudoku
- gnome-taquin
- gnome-tetravex
harden gnome-chess
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Create ferdi.profile
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System calls (names and numbers) are not exactly the same for 32 bit
and 64 bit architectures. Let's allow defining separate filters for
32-bit arch using seccomp.32, seccomp.32.drop, seccomp.32.keep. This
is useful for mixed 64/32 bit application environments like Steam and
Wine.
Implement protocol and mdwx filtering also for 32 bit arch. It's still
better to block secondary archs completely if not needed.
Lists of supported system calls are also updated.
Warn if preload libraries would be needed due to trace, tracelog or
postexecseccomp (seccomp.drop=execve etc), because a 32-bit dynamic
linker does not understand the 64 bit preload libraries.
Closes #3267.
Signed-off-by: Topi Miettinen <toiwoton@gmail.com>
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Since target addresses for other (conditional) jumps are in hex, it's
very confusing to have one jump address in decimal.
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rules for xdg-dbus-proxy:
dbus-user filter
dbus-user.own org.gnome.Pomodoro
dbus-user.talk ca.desrt.dconf
dbus-user.talk org.gnome.Shell
dbus-system none
dbus-user filter
dbus-user.own org.gnome.Todo
dbus-user.talk ca.desrt.dconf
dbus-user.talk org.gnome.evolution.dataserver.AddressBook9
dbus-user.talk org.gnome.evolution.dataserver.Calendar8
dbus-user.talk org.gnome.evolution.dataserver.Sources5
dbus-user.talk org.gnome.evolution.dataserver.Subprocess.Backend.*
dbus-user.talk org.gnome.OnlineAccounts
dbus-user.talk org.gnome.SettingsDaemon.Color
dbus-system filter
dbus-system.talk org.freedesktop.login1
dbus-user filter
dbus.own com.github.dahenson.agenda
dbus.talk ca.desrt.dconf
dbus-system block
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