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DescriptionDustin C. Hatch
2016-01-11 15:48:30 UTC
Description of problem:
The `mkhomedirfor` script shipped with oddjob-mkhomedir, used for manually creating a home directory via oddjob-mkhomedir, cannot be run by confined users (e.g. when the *mls* policy is in use).
Version-Release number of selected component (if applicable):
selinux-policy-mls-3.13.1-60.el7.noarch
Steps to Reproduce:
1. Enable mls SELinux policy
2. Add a user without creating a home directory (or use e.g. LDAP)
3. Run mkhomedirfor <username>
Actual results:
$ sudo sh /usr/share/doc/oddjob-mkhomedir-0.31.5/mkhomedirfor jenkins
Error org.freedesktop.DBus.Error.AccessDenied: An SELinux policy prevents this sender from sending this message to this recipient, 0 matched rules; type="method_call", sender=":1.374" (uid=0 pid=14464 comm="dbus-send --system --dest=com.redhat.oddjob_mkhome") interface="com.redhat.oddjob_mkhomedir" member="mkhomedirfor" error name="(unset)" requested_reply="0" destination="com.redhat.oddjob_mkhomedir" (uid=0 pid=1254 comm="/usr/sbin/oddjobd -n -p /var/run/oddjobd.pid -t 30")
Expected results:
$ sudo sh /usr/share/doc/oddjob-mkhomedir-0.31.5/mkhomedirfor jenkins
method return sender=:1.6 -> dest=:1.369 reply_serial=2
int32 0
string "Creating home directory for jenkins."
string ""
Additional info:
Here is the relevant AVC denial:
type=USER_AVC msg=audit(1452526423.932:92111): pid=659 uid=81 auid=4294967295 ses=4294967295 subj=system_u:system_r:system_dbusd_t:s0-s15:c0.c1023 msg='avc: denied { send_msg } for msgtype=method_call interface=com.redhat.oddjob_mkhomedir member=mkhomedirfor dest=com.redhat.oddjob_mkhomedir spid=14464 tpid=1254 scontext=staff_u:sysadm_r:sysadm_t:s0-s15:c0.c1023 tcontext=system_u:system_r:oddjob_t:s0-s15:c0.c1023 tclass=dbus exe="/usr/bin/dbus-daemon" sauid=81 hostname=? addr=? terminal=?'
Adding these two rules resolves the issue:
allow userdomain oddjob_t:dbus send_msg;
allow oddjob_t userdomain:dbus send_msg;
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://rhn.redhat.com/errata/RHBA-2016-2283.html
Description of problem: The `mkhomedirfor` script shipped with oddjob-mkhomedir, used for manually creating a home directory via oddjob-mkhomedir, cannot be run by confined users (e.g. when the *mls* policy is in use). Version-Release number of selected component (if applicable): selinux-policy-mls-3.13.1-60.el7.noarch Steps to Reproduce: 1. Enable mls SELinux policy 2. Add a user without creating a home directory (or use e.g. LDAP) 3. Run mkhomedirfor <username> Actual results: $ sudo sh /usr/share/doc/oddjob-mkhomedir-0.31.5/mkhomedirfor jenkins Error org.freedesktop.DBus.Error.AccessDenied: An SELinux policy prevents this sender from sending this message to this recipient, 0 matched rules; type="method_call", sender=":1.374" (uid=0 pid=14464 comm="dbus-send --system --dest=com.redhat.oddjob_mkhome") interface="com.redhat.oddjob_mkhomedir" member="mkhomedirfor" error name="(unset)" requested_reply="0" destination="com.redhat.oddjob_mkhomedir" (uid=0 pid=1254 comm="/usr/sbin/oddjobd -n -p /var/run/oddjobd.pid -t 30") Expected results: $ sudo sh /usr/share/doc/oddjob-mkhomedir-0.31.5/mkhomedirfor jenkins method return sender=:1.6 -> dest=:1.369 reply_serial=2 int32 0 string "Creating home directory for jenkins." string "" Additional info: Here is the relevant AVC denial: type=USER_AVC msg=audit(1452526423.932:92111): pid=659 uid=81 auid=4294967295 ses=4294967295 subj=system_u:system_r:system_dbusd_t:s0-s15:c0.c1023 msg='avc: denied { send_msg } for msgtype=method_call interface=com.redhat.oddjob_mkhomedir member=mkhomedirfor dest=com.redhat.oddjob_mkhomedir spid=14464 tpid=1254 scontext=staff_u:sysadm_r:sysadm_t:s0-s15:c0.c1023 tcontext=system_u:system_r:oddjob_t:s0-s15:c0.c1023 tclass=dbus exe="/usr/bin/dbus-daemon" sauid=81 hostname=? addr=? terminal=?' Adding these two rules resolves the issue: allow userdomain oddjob_t:dbus send_msg; allow oddjob_t userdomain:dbus send_msg;