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* Add 32bit ARM syscallsLibravatar Andrew Branson2020-04-15
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* xdg-dbus-proxy socket finding and mount hardeningLibravatar Kristóf Marussy2020-04-06
| | | | | | | | | | | | | | | | | | | | | | 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.
* Add xdg-dbus-proxy supportLibravatar Kristóf Marussy2020-04-06
| | | | | | | | | | | | | * 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.
* Allow changing error action in seccomp filtersLibravatar Topi Miettinen2020-04-06
| | | | | | | | | | | | | | 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.
* seccomp: allow defining separate filters for 32-bit archLibravatar Topi Miettinen2020-03-28
| | | | | | | | | | | | | | | | | | | | | 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>
* openSUSE fix: mount private-etc on /usr/etc as wellLibravatar smitsohu2020-02-09
| | | | see issue #3145
* Fix indentation for dhcp client codeLibravatar Kristóf Marussy2020-01-27
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* move copyright to 2020 (part 2) (#3181)Libravatar glitsj162020-01-24
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* Run dhclient inside the sandboxLibravatar Kristóf Marussy2019-12-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * In order to ensure that network interfaces are already configured when the sandboxed launches, we run dhclient in forking mode (no -d switch), which makes the dhclient command exit when it successfully acquired a lease. The dhclient daemon process keeps running in the background. * We read the pid file for dhclient to find out the pid of the daemon process. Because dhclient only writes the pid file in the child process potentially after the forking parent process exits, there is some handling for possible race conditions. * All lease files and pid files are under /run/firejail/dhclient/ * The v4 and v6 dhclient has a separate lease as recommended. * The v4 client is set to generate a DUID, which is also used by the v6 client so that the server can associate the two leases if needed. * /etc/resolv.conf is created in the sandbox just like with the --dns option, by mirroring /etc. When DHCP is used, /etc/resolv.conf is normally empty so that dhclient can overwrite it the nameservers from the DHCP server. Current limitations: * The dhclient processes in the background are not terminated properly (by SIGTERM or dhclient -x), nor is the DHCP lease released (by dclient -r). The reason for this is that firejail drops all capabilities and privileges before the application in the sandbox is launched, which makes it impossible to launch dhclient to release the lease or kill the dhclient processes still running with the effective user id of root. Instead the dhclient daemons die with the sandbox. According to the dhclient man page, releasing the lease is not required by the DHCP specification, so this is not a problem, however some ISPs may require releasing leases. A possible workaround would be to fork another process upon sandbox initialization that invokes dhclient -r when the sandbox is ready to exit. This would require communication with the main firejail process through a pipe, while keeping and required privileges. As this would add some complexity but the benefits have limited applicability (compatibility with esoteric DHCP server configurations), I chose not to implement this. * When only an IPv6 address is requested, the interface may possible not have a link-local address when we run dhclient. This causes dhclient -6 fail, since DHCPv6 uses link-local addressing instead of layer 2 addressing, see e.g., https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=783387 In a future commit, waiting for a link-local address will be added.
* Allow libtrace preload library to use for trace output a logfile specified ↵Libravatar Glenn Washburn2019-08-29
| | | | by the environment variable FIREJAIL_TRACEFILE or as the RUN_TRACE_FILE if it exists ortherwise use the console as before.
* reduce redundancy in pathsLibravatar Reiner Herrmann2019-06-21
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* rundefs.h: housekeepingLibravatar smitsohu2019-05-28
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* fix previous commit, more seccomp testingLibravatar netblue302019-04-09
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* HousekeepingLibravatar Fred-Barclay2019-02-17
| | | | | Make sure all files end with a newline Strip extra newlines and trailing whitespace from files
* move copyright statement to 2019Libravatar smitsohu2019-02-07
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* fix and harden overlay optionsLibravatar smitsohu2018-08-28
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* Replace all possible HTTP links with HTTPSLibravatar Tad2018-08-08
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* evaluate UID_MIN/GID_MID at runtime, remove compile time evaluation - fixes ↵Libravatar netblue302018-06-04
| | | | #1964
* user access database in /etc/firejail/firejail.users - more to comeLibravatar netblue302018-04-05
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* fix seccomp compile problem on Debian wheezy 32bitLibravatar netblue302018-03-22
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* fix seccomp compile on Debian wheezyLibravatar netblue302018-03-22
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* private-lib bug: 32 bit libraries being copied instead of 64 bit versions; ↵Libravatar startx20172018-03-12
| | | | splitting common code for firejail and fldd in a common static library
* add new syscalls from glibc 2.26-10Libravatar Vasya Novikov2018-01-18
| | | | File generated by ../tools/extract_syscall, as per instructions
* move copyright statement to 2018Libravatar startx20172018-01-14
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* replacing seccomp printing with a seccomp disassemblerLibravatar netblue302017-12-28
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* added a tool to measure time spent in various functionsLibravatar startx20172017-10-09
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* merge fixes from 0.9.50-bugfixes branchLibravatar netblue302017-09-11
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* Improve seccomp architecture supportLibravatar Topi Miettinen2017-09-10
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* fix #1522Libravatar netblue302017-09-03
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* Improve seccomp support for non-x86 architecturesLibravatar Topi Miettinen2017-09-02
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* Feature: switch/config option to block secondary architecturesLibravatar Topi Miettinen2017-08-19
| | | | | | | | | Add a feature for a new (opt-in) command line switch and config file option to block secondary architectures entirely. Also block changing Linux execution domain with personality() system call for the primary architecture. Closes #1479
* fix copyright statementLibravatar netblue302017-08-05
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* Improve seccomp printingLibravatar Topi Miettinen2017-07-28
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* Remove trailing whitespace from src/Libravatar Fred Barclay2017-05-24
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* 32bit plaform fixesLibravatar netblue302017-05-10
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* measure start timeLibravatar netblue302017-05-09
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* syscall list update (kernel 4.9.4, Arch Linux)Libravatar startx20172017-03-22
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* copyright 2017Libravatar netblue302017-02-11
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* hidepid part 4Libravatar netblue302016-11-11
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* moving --profile to sboxLibravatar netblue302016-10-28
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* sboxLibravatar netblue302016-10-27
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* testingLibravatar netblue302016-10-13
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* Arch Linux fix: setegid errorLibravatar netblue302016-08-30
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* change errExit message to include filenameLibravatar Aleksey Manevich2016-08-30
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* tighten secutiryLibravatar Aleksey Manevich2016-08-24
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* firemon fixesLibravatar netblue302016-08-17
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* support to disable enforcing firejail.configLibravatar netblue302016-06-12
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* euid switchingLibravatar netblue302016-02-19
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* euid switchingLibravatar netblue302016-02-18
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* Include <sys/socket.h> for sa_family_t (RHEL 6.6)Libravatar Martin Carpenter2016-01-29
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