udevil.conf

##############################################################################
#
# udevil configuration file    /etc/udevil/udevil.conf
#
# This file controls what devices, networks, and files users may mount and
# unmount via udevil (set suid).
#
# IMPORTANT:  IT IS POSSIBLE TO CREATE SERIOUS SECURITY PROBLEMS IF THIS FILE
# IS MISCONFIGURED - EDIT WITH CARE
#
# Note:  For greater control for specific users, including root, copy this
# file to /etc/udevil/udevil-user-USERNAME.conf replacing USERNAME with the
# desired username (eg /etc/udevil/udevil-user-jim.conf).
#
# Format:
#   OPTION = VALUE[, VALUE, ...]
#
# DO NOT USE QUOTES except literally
# Lines beginning with # are ignored
#
##############################################################################


# To log all uses of udevil, set log_file to a file path:
# log_file = /var/log/udevil.log

# Approximate number of days to retain log entries (0=forever, max=60):
log_keep_days = 10


# allowed_types determines what fstypes can be passed by a user to the u/mount
# program, what device filesystems may be un/mounted implicitly, and what
# network filesystems may be un/mounted.
# It may also include the 'file' keyword, indicating that the user is allowed
# to mount files (eg an ISO file).  The $KNOWN_FILESYSTEMS variable may
# be included to include common local filesystems as well as those listed in
# /etc/filesystems and /proc/filesystems.
# allowed_types_USERNAME, if present, is used to override allowed_types for
# the specific user 'USERNAME'.  For example, to allow user 'jim' to mount
# only vfat filesystems, add:
# allowed_types_jim = vfat
# Setting allowed_types = * does NOT allow all types, as this is a security
# risk, but does allow all recognized types.
# allowed_types = $KNOWN_FILESYSTEMS, file, cifs, smbfs, nfs, curlftpfs, ftpfs, sshfs, tmpfs, ramfs
#allowed_types = $KNOWN_FILESYSTEMS, file


# allowed_users is a list of users permitted to mount and unmount with udevil.
# Wildcards (* or ?) may be used in the usernames.  To allow all users,
# specify "allowed_users=*".  UIDs may be included using the form UID=1000.
# For example:  allowed_users = carl, UID=1000, pre*
# Also note that permission to execute udevil may be limited to users belonging
# to the group that owns /usr/bin/udevil, such as 'plugdev' or 'storage',
# depending on installation.
# allowed_users_FSTYPE, if present, is used to override allowed_users when
# mounting or unmounting a specific fstype (eg nfs, ext3, file).
# Note that when mounting a file, fstype will always be 'file' regardless of
# the internal fstype of the file.
# For example, to allow only user 'bob' to mount nfs shares, add:
# allowed_users_nfs = bob
# The root user is NOT automatically allowed to use udevil in some cases unless
# listed here (except for unmounting anything or mounting fstab devices).
#allowed_users = *


# allowed_groups is a list of groups permitted to mount and unmount with
# udevil.  The user MUST belong to at least one of these groups.  Wildcards
# or GIDs may NOT be used in group names, but a single * may be used to allow
# all groups.
# Also note that permission to execute udevil may be limited to users belonging
# to the group that owns /usr/bin/udevil, such as 'plugdev' or 'storage',
# depending on installation.
# allowed_groups_FSTYPE, if present, is used to override allowed_groups when
# mounting or unmounting a specific fstype (eg nfs, ext3, file).  For example,
# to allow only members of the 'network' group to mount smb and nfs shares,
# use both of these lines:
# allowed_groups_smbfs = network
# allowed_groups_nfs = network
# The root user is NOT automatically allowed to use udevil in some cases unless
# listed here (except for unmounting anything or mounting fstab devices).
#allowed_groups = *


# allowed_media_dirs specifies the media directories in which user mount points
# may be located.  The first directory which exists and does not contain a
# wildcard will be used as the default media directory (normally /media or
# /run/media/$USER).
# The $USER variable, if included, will be replaced with the username of the
# user running udevil.  Wildcards may also be used in any directory EXCEPT the
# default.  Wildcards will not match a /
# allowed_media_dirs_FSTYPE, if present, is used to override allowed_media_dirs
# when mounting or unmounting a specific fstype (eg ext2, nfs).  For example,
# to cause /media/network to be used as the default media directory for
# nfs and ftpfs mounts, use these two lines:
# allowed_media_dirs_nfs   = /media/network, /media, /run/media/$USER
# allowed_media_dirs_ftpfs = /media/network, /media, /run/media/$USER
# NOTE: If you want only the user who mounted a device to have access to it
# and be allowed to unmount it, specify /run/media/$USER as the first
# allowed media directory.
# IMPORTANT:  If an allowed file is mounted to a media directory, the user may
# be permitted to unmount its associated loop device even though internal.
# INCLUDING /MNT HERE IS NOT RECOMMENDED.  ALL ALLOWED MEDIA DIRECTORIES
# SHOULD BE OWNED AND WRITABLE ONLY BY ROOT.
#allowed_media_dirs = /media, /run/media/$USER


# allowed_devices is the first criteria for what block devices users may mount
# or unmount.  If a device is not listed in allowed_devices, it cannot be
# un/mounted (unless in fstab).  However, even if a device is listed, other
# factors may prevent its use.  For example, access to system internal devices
# will be denied to normal users even if they are included in allowed_devices.
# allowed_devices_FSTYPE, if present, is used to override allowed_devices when
# mounting or unmounting a specific fstype (eg ext3, ntfs).  For example, to
# prevent all block devices containing an ext4 filesystem from being
# un/mounted use:
# allowed_devices_ext4 =
# Note: Wildcards may be used, but a wildcard will never match a /, except
# for "allowed_devices=*" which allows any device.  The recommended setting is
# allowed_devices = /dev/*
# WARNING:  ALLOWING USERS TO MOUNT DEVICES OUTSIDE OF /dev CAN CAUSE SERIOUS
# SECURITY PROBLEMS.  DO NOT ALLOW DEVICES IN /dev/shm
#allowed_devices = /dev/*


# allowed_internal_devices causes udevil to treat any listed block devices as
# removable, thus allowing normal users to un/mount them (providing they are
# also listed in allowed_devices).
# allowed_internal_devices_FSTYPE, if present, is used to override
# allowed_internal_devices when mounting or unmounting a specific fstype
# (eg ext3, ntfs).  For example, to allow block devices containing a vfat
# filesystem to be un/mounted even if they are system internal devices, use:
# allowed_internal_devices_vfat = /dev/sdb*
# Some removable esata drives look like internal drives to udevil.  To avoid
# this problem, they can be treated as removable with this setting.
# WARNING:  SETTING A SYSTEM DEVICE HERE CAN CAUSE SERIOUS SECURITY PROBLEMS.
# allowed_internal_devices =


# allowed_internal_uuids and allowed_internal_uuids_FSTYPE work similarly to
# allowed_internal_devices, except that UUIDs are specified instead of devices.
# For example, to allow un/mounting of an internal filesystem based on UUID:
# allowed_internal_uuids = cc0c4489-8def-1e5b-a304-ab87c3cb626c0
# WARNING:  SETTING A SYSTEM DEVICE HERE CAN CAUSE SERIOUS SECURITY PROBLEMS.
# allowed_internal_uuids =


# forbidden_devices is used to prevent block devices from being un/mounted
# even if other settings would allow them (except devices in fstab).
# forbidden_devices_FSTYPE, if present, is used to override
# forbidden_devices when mounting or unmounting a specific fstype
# (eg ext3, ntfs).  For example, to prevent device /dev/sdd1 from being
# mounted when it contains an ntfs filesystem, use:
# forbidden_devices_ntfs = /dev/sdd1
# NOTE: device node paths are canonicalized before being tested, so forbidding
# a link to a device will have no effect.
forbidden_devices = *


# allowed_networks determines what hosts may be un/mounted by udevil users when
# using nfs, cifs, smbfs, curlftpfs, ftpfs, or sshfs.  Hosts may be specified
# using a hostname (eg myserver.com) or IP address (192.168.1.100).
# Wildcards may be used in hostnames and IP addresses, but CIDR notation
# (192.168.1.0/16) is NOT supported.  IP v6 is supported.  For example:
# allowed_networks = 127.0.0.1, 192.168.1.*, 10.0.0.*, localmachine, *.okay.com
# Or, to prevent un/mounting of any network shares, set:
# allowed_networks =
# allowed_networks_FSTYPE, if present, is used to override allowed_networks
# when mounting or unmounting a specific network fstype (eg nfs, cifs, sshfs,
# curlftpfs).  For example, to limit nfs and samba shares to only local
# networks, use these two lines:
# allowed_networks_nfs = 192.168.1.*, 10.0.0.*
# allowed_networks_cifs = 192.168.1.*, 10.0.0.*
#allowed_networks = *


# forbidden_networks and forbidden_networks_FSTYPE are used to specify networks
# that are never allowed, even if other settings allow them (except fstab).
# NO REVERSE LOOKUP IS PERFORMED, so including bad.com will only have an effect
# if the user uses that hostname.  IP lookup is always performed, so forbidding
# an IP address will also forbid all corresponding hostnames.
forbidden_networks = *


# allowed_files is used to determine what files in what directories may be
# un/mounted.  A user must also have read permission on a file to mount it.
# Note: Wildcards may be used, but a wildcard will never match a /, except
# for "allowed_files=*" which allows any file.  For example, to allow only
# files in the /share directory to be mounted, use:
# allowed_files = /share/*
# NOTE:  Specifying allowed_files_FSTYPE will NOT work because the fstype of
# files is always 'file'.
#allowed_files = *


# forbidden_files is used to specify files that are never allowed, even if
# other settings allow them (except fstab).  Specify a full path.
# Note: Wildcards may be used, but a wildcard will never match a /, except
# for "forbidden_files = *".
# NOTE: file paths are canonicalized before being tested, so forbidding
# a link to a file will have no effect.
forbidden_files = *


# default_options specifies what options are always included when performing
# a mount, in addition to any options the user may specify.
# Note:  When a device is present in /etc/fstab, and the user does not specify
# a mount point, the device is mounted with normal user permissions using
# the fstab entry, without these options.
# default_options_FSTYPE, if present, is used to override default_options
# when mounting a specific fstype (eg ext2, nfs).
# The variables $USER, $UID, and $GID are changed to the user's username, UID,
# and GID.
# FOR GOOD SECURITY, default_options SHOULD ALWAYS INCLUDE: nosuid,noexec,nodev
# WARNING:  OPTIONS PRESENT OR MISSING CAN CAUSE SERIOUS SECURITY PROBLEMS.
default_options           = nosuid, noexec, nodev, noatime
default_options_file      = nosuid, noexec, nodev, noatime, uid=$UID, gid=$GID, ro
# mount iso9660 with 'ro' to prevent mount read-only warning
default_options_iso9660   = nosuid, noexec, nodev, noatime, uid=$UID, gid=$GID, ro, utf8
default_options_udf       = nosuid, noexec, nodev, noatime, uid=$UID, gid=$GID
default_options_vfat      = nosuid, noexec, nodev, noatime, fmask=0022, dmask=0022, uid=$UID, gid=$GID, utf8
default_options_msdos     = nosuid, noexec, nodev, noatime, fmask=0022, dmask=0022, uid=$UID, gid=$GID
default_options_umsdos    = nosuid, noexec, nodev, noatime, fmask=0022, dmask=0022, uid=$UID, gid=$GID
default_options_ntfs      = nosuid, noexec, nodev, noatime, uid=$UID, gid=$GID, utf8
default_options_cifs      = nosuid, noexec, nodev, uid=$UID, gid=$GID
default_options_smbfs     = nosuid, noexec, nodev, uid=$UID, gid=$GID
default_options_sshfs     = nosuid, noexec, nodev, noatime, uid=$UID, gid=$GID, nonempty, allow_other
default_options_curlftpfs = nosuid, noexec, nodev, noatime, uid=$UID, gid=$GID, nonempty, allow_other
default_options_ftpfs     = nosuid, noexec, nodev, noatime, uid=$UID, gid=$GID
default_options_tmpfs     = nosuid, noexec, nodev, noatime, uid=$UID, gid=$GID
default_options_ramfs     = nosuid, noexec, nodev, noatime, uid=$UID, gid=$GID


# allowed_options determines all options that a user may specify when mounting.
# All the options used in default_options above must be included here too, or
# they will be rejected.  If the user attempts to use an option not included
# here, an error will result.  Wildcards may be used.
# allowed_options_FSTYPE, if present, is used to override allowed_options
# when mounting a specific fstype (eg ext2, nfs).
# The variables $USER, $UID, and $GID are changed to the user's username, UID,
# and GID.
# If you want to forbid remounts, remove 'remount' from here.
# WARNING:  OPTIONS HERE CAN CAUSE SERIOUS SECURITY PROBLEMS - CHOOSE CAREFULLY
allowed_options           = nosuid, noexec, nodev, noatime, fmask=0022, dmask=0022, uid=$UID, gid=$GID, ro, rw, sync, flush, iocharset=*, utf8, remount
allowed_options_nfs       = nosuid, noexec, nodev, noatime, ro, rw, sync, remount, port=*, rsize=*, wsize=*, hard, proto=*, timeo=*, retrans=*
allowed_options_cifs      = nosuid, noexec, nodev, ro, rw, remount, port=*, user=*, username=*, pass=*, password=*, guest, domain=*, uid=$UID, gid=$GID, credentials=*
allowed_options_smbfs     = nosuid, noexec, nodev, ro, rw, remount, port=*, user=*, username=*, pass=*, password=*, guest, domain=*, uid=$UID, gid=$GID, credentials=*
allowed_options_sshfs     = nosuid, noexec, nodev, noatime, ro, rw, uid=$UID, gid=$GID, nonempty, allow_other, idmap=user, BatchMode=yes, port=*
allowed_options_curlftpfs = nosuid, noexec, nodev, noatime, ro, rw, uid=$UID, gid=$GID, nonempty, allow_other, user=*
allowed_options_ftpfs     = nosuid, noexec, nodev, noatime, ro, rw, port=*, user=*, pass=*, ip=*, root=*, uid=$UID, gid=$GID


# mount_point_mode, if present and set to a non-empty value, will cause udevil
# to set the mode (permissions) on the moint point after mounting  If not
# specified or if left empty, the mode is not changed.  Mode must be octal
# starting with a zero (0755).
# mount_point_mode_FSTYPE, if present, is used to override mount_point_mode
# when mounting a specific fstype (eg ext2, nfs).
# NOT SETTING A MODE CAN HAVE SECURITY IMPLICATIONS FOR SOME FSTYPES
mount_point_mode = 0755
# don't set a mode for some types:
mount_point_mode_sshfs =
mount_point_mode_curlftpfs =
mount_point_mode_ftpfs =


# Use the settings below to change the default locations of programs used by
# udevil, or (advanced topic) to redirect commands to your scripts.
# When substituting scripts, make sure they are root-owned and accept the
# options used by udevil (for example, the mount_program must accept --fake,
# -o, -v, and other options valid to mount.)
# Be sure to specify the full path and include NO OPTIONS or other arguments.
# These programs may also be specified as configure options when building
# udevil.
# THESE PROGRAMS ARE RUN AS ROOT
# mount_program   = /bin/mount
# umount_program  = /bin/umount
# losetup_program = /sbin/losetup
# setfacl_program = /usr/bin/setfacl


# validate_exec specifies a program or script which provides additional
# validation of a mount or unmount command, beyond the checks performed by
# udevil.  The program is run as a normal user (if root runs udevil,
# validate_exec will NOT be run).  The program is NOT run if the user is
# mounting a device without root priviledges (a device in fstab).
# The program is passed the username, a printable description of what is
# happening, and the entire udevil command line as the first three arguments.
# The program must return an exit status of 0 to allow the mount or unmount
# to proceed.  If it returns non-zero, the user will be denied permission.
# For example, validate_exec might specify a script which notifies you
# of the command being run, or performs additional steps to authenticate the
# user.
# Specify a full path to the program, with NO options or arguments.
# validate_exec =


# validate_rootexec works similarly to validate_exec, except that the program
# is run as root.  validate_rootexec will also be run if the root user runs
# udevil.  If both validate_exec and validate_rootexec are specified,
# validate_rootexec will run first, followed by validate_exec.
# The program must return an exit status of 0 to allow the mount or unmount
# to proceed.  If it returns non-zero, the user will be denied permission.
# Unless you are familiar with writing root scripts, it is recommended that
# rootexec settings NOT be used, as it is easy to inadvertently open exploits.
# THIS PROGRAM IS ALWAYS RUN AS ROOT, even if the user running udevil is not.
# validate_rootexec =


# success_exec is run after a successful mount, remount, or unmount.  The
# program is run as a normal user (if root runs udevil, success_exec
# will NOT be run).
# The program is passed the username, a printable description of what action
# was taken, and the entire udevil command line as the first three arguments.
# The program's exit status is ignored.
# For example, success_exec might run a script which informs you of what action
# was taken, and might perform further actions.
# Specify a full path to the program, with NO options or arguments.
# success_exec =


# success_rootexec works similarly to success_exec, except that the program is
# run as root.  success_rootexec will also be run if the root user runs udevil.
# If both success_exec and success_rootexec are specified,  success_rootexec
# will run first, followed by success_exec.
# Unless you are familiar with writing root scripts, it is recommended that
# rootexec settings NOT be used, as it is easy to inadvertently open exploits.
# THIS PROGRAM IS ALWAYS RUN AS ROOT, even if the user running udevil is not.
# success_rootexec =