This partially reverts commit 65da822c1b
Connecting to setransd is still very much necessary for any domain that
uses SELinux labels in any way.
Signed-off-by: bauen1 <j2468h@gmail.com>
I have been working to support IMA/EVM on a system. It
requires having keys added to the kernel keyring. Keys
added with keyctl and evmctl. I am creating keys in the
ima_key_t type. Once the keys are created, many domains
then need search permission on the type of the key. The
following changes are needed to get things to work.
Need to add keys to the kernel keyring (keyctl).
type=AVC msg=audit(1585420717.704:1868): avc: denied { write } for pid=8622 comm="keyctl" scontext=system_u:system_r:cleanup_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=key permissive=1
Allow all domains to search key
type=AVC msg=audit(1587936822.802:556): avc: denied { search } for pid=5963 comm="kworker/u16:6" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:ima_key_t:s0 tclass=key permissive=1
type=AVC msg=audit(1587936822.804:559): avc: denied { search } for pid=5963 comm="systemd-cgroups" scontext=system_u:system_r:systemd_cgroups_t:s0 tcontext=system_u:object_r:ima_key_t:s0 tclass=key permissive=1
type=AVC msg=audit(1587936822.809:560): avc: denied { search } for pid=5964 comm="(sysctl)" scontext=system_u:system_r:init_t:s0 tcontext=system_u:object_r:ima_key_t:s0 tclass=key permissive=1
type=AVC msg=audit(1587936822.813:562): avc: denied { search } for pid=5964 comm="sysctl" scontext=system_u:system_r:initrc_t:s0 tcontext=system_u:object_r:ima_key_t:s0 tclass=key permissive=1
type=AVC msg=audit(1587936823.149:604): avc: denied { search } for pid=5987 comm="setsebool" scontext=system_u:system_r:semanage_t:s0 tcontext=system_u:object_r:ima_key_t:s0 tclass=key permissive=1
Signed-off-by: Dave Sugar <dsugar@tresys.com>
Add EFI bootloaders rEFInd and systemd-boot. Boot tools which manage
bootloader files in UEFI (DOS) partition need also to manage UEFI boot
variables in efivarfs. Bootctl (systemd-boot tool) verifies the type
of EFI file system and needs to mmap() the files.
Signed-off-by: Topi Miettinen <toiwoton@gmail.com>
Allow systemd-networkd to send and receive ICMPv6 Router Solicitation
and Router Advertisement packets (in reality all ICMP/ICMPv6 packets)
and DHCP client packets.
Signed-off-by: Topi Miettinen <toiwoton@gmail.com>
In many cases, this won't result in a change in the actual policy generated, but if the definitions of macros are changed going forward, the mismatches could cause issues.
Signed-off-by: Daniel Burgener <Daniel.Burgener@microsoft.com>
When using network namespaces with `ip netns`, command `ip` creates
files in `/run/netns` that are mountpoints for `nsfs`. For example:
$ ip netns add VPN
$ ls -Z /run/netns/VPN
system_u:object_r:nsfs_t /run/netns/VPN
$ findmnt /run/netns/VPN
TARGET SOURCE FSTYPE OPTIONS
/run/netns/VPN nsfs[net:[4026532371]] nsfs rw
/run/netns/VPN nsfs[net:[4026532371]] nsfs rw
From a shell CLI, it is possible to retrieve the name of the current
network namespace:
$ ip netns exec VPN bash
$ ip netns identify $$
VPN
This requires reading `/proc/$PID/ns/net`, which is labelled as a user
domain. Allow this access using `userdom_read_all_users_state()`.
Signed-off-by: Nicolas Iooss <nicolas.iooss@m4x.org>
`sysdig` is a tool that enables introspecting the system, debugging it,
etc. It uses a driver that creates `/dev/sysdig0`. Define a specific
label in order to be able to allow using it.
Signed-off-by: Nicolas Iooss <nicolas.iooss@m4x.org>
I'm seeing problems on RHEL7 with lvm2-activation-generator that are
coming from recent changes to put systemd-fstab-generator into it's
own domain. I resolved the issues by creaing this generator attribute
to grant common generator permissions and move all generators into
a single systemd_generator_t domain.
Then setup specific types for the following generators:
lvm2-activation-generator - needs to read lvm2 config
systemd-sysv-generator - needs to read stuff in init_t that other generators don't.
systemd-efi-boot-generator - needs to read stuff on the EFI boot partition labeled boot_t
For fstab generator allow it to write /sys
[ 19.482951] type=1400 audit(1584548691.268:7): avc: denied { write } for pid=1638 comm="systemd-fstab-g" name="/" dev="sysfs" ino=1 Allow scontext=system_u:system_r:systemd_fstab_generator_t:s0 tcontext=system_u:object_r:sysfs_t:s0 tclass=dir permissive=1
audit(1585500099.139:6): avc: denied { read } for pid=1635 comm="systemd-cryptse" path="/run/systemd/generator/dev-mapper-luks\x2d6a613af0\x2d0a61\x2d462f\x2d8679\x2d1b0d964fbc88.device.d/.#90-device-timeout.confsOskdU" dev="tmpfs" ino=12243 scontext=system_u:system_r:systemd_generator_t:s0 tcontext=system_u:object_r:init_runtime_t:s0 tclass=file permissive=1
audit(1585500099.139:7): avc: denied { setattr } for pid=1635 comm="systemd-cryptse" name=".#90-device-timeout.confsOskdU" dev="tmpfs" ino=12243 scontext=system_u:system_r:systemd_generator_t:s0 tcontext=system_u:object_r:init_runtime_t:s0 tclass=file permissive=1
audit(1585500099.139:8): avc: denied { rename } for pid=1635 comm="systemd-cryptse" name=".#90-device-timeout.confsOskdU" dev="tmpfs" ino=12243 scontext=system_u:system_r:systemd_generator_t:s0 tcontext=system_u:object_r:init_runtime_t:s0 tclass=file permissive=1
Signed-off-by: Dave Sugar <dsugar@tresys.com>
According to IANA, winshadow is port 3261 for both TCP and UDP.
3161 for TCP looks like a typo that slipped through.
Signed-off-by: Florian Schmidt <flosch@nutanix.com>
There is a STIG requirement (CCE-27326-8) that all files in /dev be labeled (something other than 'device_t'). On the systems I am working on there are a few files labeled device_t.
Signed-off-by: Dave Sugar <dsugar100@gmail.com>
Modern systems shouldn't need direct access to raw memory
devices (/dev/mem, /dev/kmem, /dev/mergemem, dev/oldmem, /dev/port)
anymore, so let's remove the access in most cases and make it tunable
in the rest.
Add dev_read_raw_memory_cond(), dev_write_raw_memory_cond() and
dev_wx_raw_memory_cond(), which are conditional to new boolean
allow_raw_memory_access.
Remove raw memory access for a few domains that should never have
needed it (colord_t, iscsid_t, mdamd_t, txtstat_t), should not need it
anymore (dmidecode_t, Debian devicekit_diskt_t, hald_t, hald_mac_t,
xserver_t) or the domains that should transition to different domain
for this (rpm_t, kudzu_t, dpkg_t).
Signed-off-by: Topi Miettinen <toiwoton@gmail.com>
/dev/ipmi is labeled, but no interfaces exist to grant access to the device.
Adding interface for read/write access, I'm not sure of read-only access is usefull. ipmitool seems to only read and write
type=AVC msg=audit(1581618155.319:786): avc: denied { read write } for pid=4498 comm="ipmitool" name="ipmi0" dev="devtmpfs" ino=10460 scontext=system_u:system_r:ipmi_t:s0 tcontext=system_u:object_r:ipmi_device_t:s0 tclass=chr_file permissive=1
type=AVC msg=audit(1581618155.319:786): avc: denied { open } for pid=4498 comm="ipmitool" path="/dev/ipmi0" dev="devtmpfs" ino=10460 scontext=system_u:system_r:ipmi_t:s0 tcontext=system_u:object_r:ipmi_device_t:s0 tclass=chr_file permissive=1
type=AVC msg=audit(1581618155.320:787): avc: denied { ioctl } for pid=4498 comm="ipmitool" path="/dev/ipmi0" dev="devtmpfs" ino=10460 ioctlcmd=6910 scontext=system_u:system_r:ipmi_t:s0 tcontext=system_u:object_r:ipmi_device_t:s0 tclass=chr_file permissive=1
This exception goes back 14 years to commit 85c20af3c1 and 11a0508ede.
The tts exception is covered by a distro agnostic rule further up, and the udev rule doesn't even work (it's supposed to be /lib/udev/ not /usr/lib/udev on gentoo) so I seriously doubt anyone is going to miss them.
Signed-off-by: Vilgot <Vilgot@fredenberg.xyz>
the permissions to write the wireless device in order to
prevent a possible Denial of Service (DoS) attack from an
unprivileged process bringing down the wireless interfaces.
Only administrative users can now enable/disable the wireless
interfaces, while normal users can only read their status.
Signed-off-by: Guido Trentalancia <guido@trentalancia.com>
---
policy/modules/kernel/devices.if | 18 ++++++++++++++++++
policy/modules/system/userdomain.if | 3 ++-
2 files changed, 20 insertions(+), 1 deletion(-)
