On a Debian 10 test virtual machine, when installing packages adds a
group, the following AVC occurs:
type=USER_AVC msg=audit(1578863991.588:575): pid=381 uid=104
auid=4294967295 ses=4294967295 subj=system_u:system_r:system_dbusd_t
msg='avc: denied { send_msg } for msgtype=method_call
interface=org.freedesktop.systemd1.Manager
member=LookupDynamicUserByName dest=org.freedesktop.systemd1
spid=13759 tpid=1 scontext=unconfined_u:unconfined_r:groupadd_t
tcontext=system_u:system_r:init_t tclass=dbus permissive=1
exe="/usr/bin/dbus-daemon" sauid=104 hostname=? addr=? terminal=?'
Allow groupadd to use nss-systemd, which calls DBUS method
LookupDynamicUserByName().
Signed-off-by: Nicolas Iooss <nicolas.iooss@m4x.org>
This patch is based on comments from previous a patch to
remove the many uses of kernel_dgram_send() and incorporate
it into logging_send_syslog_msg().
v2 - enclose in ifdef for redhat
v3 - rebase this patch on e41def136a
Signed-off-by: Dave Sugar <dsugar@tresys.com>
Remove complement (~) and wildcard (*) in allow rules so that there are no
unintentional additions when new permissions are declared.
This patch does not add or remove permissions from any rules.
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>
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.
Chris PeBenito
Nicolas Iooss
Sugar, David
Russell Coker
Chris PeBenito
Dominick Grift
Sven Vermeulen
Harry Ciao
Dominick Grift
Chris PeBenito