When ping is installed with capabilities instead of being marked setuid,
then the ping_t domain needs to be allowed to getcap/setcap.
Reported-by: Luis Ressel <aranea@aixah.de>
Signed-off-by: Sven Vermeulen <sven.vermeulen@siphos.be>
The grub2-install application runs a few grub2-* commands. Two of those,
grub2-bios-setup and grub2-probe, need read/write access to the (fixed) disks.
Mark those two applications as bootloader_exec_t (as is the case with the "grub"
legacy command in the past) allows the commands to continue.
Signed-off-by: Sven Vermeulen <sven.vermeulen@siphos.be>
The chsh application (which runs in the chfn_t domain) requires read access on
the file context definitions. If not, the following error occurs:
Changing the login shell for root
Enter the new value, or press ENTER for the default
Login Shell [/bin/zsh]: /bin/bash
chsh: failure while writing changes to /etc/passwd
The following AVC denials are shown:
Jan 23 20:23:43 lain kernel: [20378.806719] type=1400 audit(1358969023.507:585):
avc: denied { search } for pid=18281 comm="chsh" name="selinux" dev="dm-0"
ino=23724520 scontext=staff_u:sysadm_r:chfn_t
tcontext=system_u:object_r:selinux_config_t tclass=dir
In permissive mode, this goes up to:
Jan 23 20:22:15 lain kernel: [20290.691128] type=1400 audit(1358968935.217:566):
avc: denied { open } for pid=18195 comm="chsh"
path="/etc/selinux/strict/contexts/files/file_contexts" dev="dm-0" ino=23726403
scontext=staff_u:sysadm_r:chfn_t tcontext=staff_u:object_r:file_context_t
tclass=file
Hence, adding in seutil_read_file_contexts().
A second error is that chsh, if available, wants to execute nscd:
Changing the login shell for root
Enter the new value, or press ENTER for the default
Login Shell [/bin/sh]: /bin/bash
chsh: cannot execute /usr/sbin/nscd: Permission denied
chsh: nscd exited with status 126
chsh: Failed to flush the nscd cache.
chsh: cannot execute /usr/sbin/nscd: Permission denied
chsh: nscd exited with status 126
chsh: Failed to flush the nscd cache.
chsh: cannot execute /usr/sbin/nscd: Permission denied
chsh: nscd exited with status 126
chsh: Failed to flush the nscd cache.
Similar to most other user admin utilities, we grant it the rights to run nscd.
Changes since v1
- Removed seutil_dontaudit_search_config() call
Signed-off-by: Sven Vermeulen <sven.vermeulen@siphos.be>
Use nscd_use instead of nscd_socket_use. This conditionally allows
nscd_shm_use
Remove the nscd_socket_use from ssh_keygen since it was redundant
already allowed by auth_use_nsswitch
Had to make some ssh_keysign_t rules unconditional else
nscd_use(ssh_keysign_t) would not build (nested booleans) but that does
not matter, the only actual domain transition to ssh_keysign_t is
conditional so the other unconditional ssh_keygen_t rules are
conditional in practice
Signed-off-by: Dominick Grift <dominick.grift@gmail.com>
When invoking tcpdump, the application creates a netlink_socket and then chroots
into /var/lib/tcpdump.
Without the right to create a netlink_socket:
tcpdump: Can't open netlink socket 13:Permission denied
Without the right on dac_read_search and sys_chroot:
tcpdump: Couldn't chroot/chdir to '/var/lib/tcpdump': Permission denied
See also https://bugs.gentoo.org/show_bug.cgi?id=443624
Signed-off-by: Sven Vermeulen <sven.vermeulen@siphos.be>
Now that we have file_contexts.subs_dist, translations that were put in the file context definition files can now be
cleaned up.
Differences from v1:
- removes a few duplicate entries in the libraries.fc file, and
- removes the contrib references
Signed-off-by: Sven Vermeulen <sven.vermeulen@siphos.be>
When using sudo with SELinux integrated support, the sudo domains need to be able to create user keys. Without this
privilege, any command invoked like "sudo /etc/init.d/local status" will run within the sudo domain (sysadm_sudo_t)
instead of the sysadm_t domain (or whatever domain is mentioned in the sudoers file).
Signed-off-by: Sven Vermeulen <sven.vermeulen@siphos.be>
By default, any role attribute should be able to type their "own" types
that share the same prefix and used in the run interface. For example,
role newrole_roles types newrole_t;
so that the calling domain of the seutil_run_newrole() interface could
properly tansition into newrole_t. Without above role rule, the caller's
role won't be associated with newrole_t.
Other role attributes such as useradd_roles, groupadd_roles, chfn_roles
and run_init_roles should be fixed in the same way.
Many users use portage from within cron (for instance to update the
portage tree or even automatically update their system). As such, we
allow to run portage from the (system) cronjob domains.
Signed-off-by: Sven Vermeulen <sven.vermeulen@siphos.be>
We allow portage to call gpg. However, this requires that the location
where the trustdb is stored is marked as a read/write type. The default
location used within Gentoo is /etc/portage/gpg, which would lead to
portage_conf_t. However, this type should remain a read-only type.
As such, we introduce a type called portage_gpg_t for this location and
grant portage_fetch_t the necessary rights on this type.
Signed-off-by: Sven Vermeulen <sven.vermeulen@siphos.be>
Enhance portage_fetch_t from an application type to a domain. Introduce
the proper portage_fetch_exec_t and add the necessary privileges to the
domain definition to allow portage_fetch_t to be used by Portage
management utilities like layman and emerge-webrsync.
We enhance portage_domtrans() to include portage_fetch_t support.
Providing a different interface (portage_fetch_domtrans) is possible
too, but since every application and role that needs to deal with
portage needs to deal with the fetching as well, and vice versa, we keep
this in portage_domtrans.
Signed-off-by: Sven Vermeulen <sven.vermeulen@siphos.be>
The gcc-config application uses some functions (from
/etc/init.d/functions.sh) which are simple wrappers on top of
/sbin/rc. Since this script is sourced and the functions executed
from within gcc_config_t, we allow gcc-config to execute /sbin/rc
without transitioning.
Signed-off-by: Sven Vermeulen <sven.vermeulen@siphos.be>
Chris PeBenito
Sven Vermeulen
Dominick Grift
Harry Ciao