Bug 339521 - dbus access denied
dbus access denied
Product: Fedora
Classification: Fedora
Component: selinux-policy (Show other bugs)
All Linux
low Severity low
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Assigned To: Daniel Walsh
Fedora Extras Quality Assurance
Depends On:
  Show dependency treegraph
Reported: 2007-10-19 07:33 EDT by Dominick Grift
Modified: 2007-11-30 17:12 EST (History)
0 users

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2007-10-19 10:41:35 EDT
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Regression: ---
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RHEL 7.3 requirements from Atomic Host:
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Description Dominick Grift 2007-10-19 07:33:32 EDT
Description of problem:

    SELinux is preventing /usr/bin/mugshot (user_mugshot_t) "connectto" to
    <Unknown> (user_dbusd_t).

Detailed Description
    SELinux denied access requested by /usr/bin/mugshot. It is not expected that
    this access is required by /usr/bin/mugshot and this access may signal an
    intrusion attempt. It is also possible that the specific version or
    configuration of the application is causing it to require additional access.

Allowing Access
    You can generate a local policy module to allow this access - see
    http://fedora.redhat.com/docs/selinux-faq-fc5/#id2961385 Or you can disable
    SELinux protection altogether. Disabling SELinux protection is not
    recommended. Please file a http://bugzilla.redhat.com/bugzilla/enter_bug.cgi
    against this package.

Additional Information        

Source Context                user2_u:user_r:user_mugshot_t:s0
Target Context                user2_u:user_r:user_dbusd_t:s0
Target Objects                None [ unix_stream_socket ]
Affected RPM Packages         mugshot-1.1.56-1.fc8 [application]
Policy RPM                    selinux-policy-3.0.8-24.fc8
Selinux Enabled               True
Policy Type                   targeted
MLS Enabled                   True
Enforcing Mode                Enforcing
Plugin Name                   plugins.catchall
Host Name                     localhost.localdomain
Platform                      Linux localhost.localdomain #1 SMP
                              Wed Oct 17 18:12:05 EDT 2007 i686 i686
Alert Count                   15
First Seen                    Thu Oct 18 14:30:43 2007
Last Seen                     Fri Oct 19 12:42:30 2007
Local ID                      8c6eb477-1516-4653-b770-babec800d894
Line Numbers                  

Raw Audit Messages            

avc: denied { connectto } for comm=mugshot egid=512 euid=511
exe=/usr/bin/mugshot exit=-13 fsgid=512 fsuid=511 gid=512 items=0
path=002F746D702F646275732D6A443559614E50647141 pid=8464
scontext=user2_u:user_r:user_mugshot_t:s0 sgid=512
subj=user2_u:user_r:user_mugshot_t:s0 suid=511 tclass=unix_stream_socket
tcontext=user2_u:user_r:user_dbusd_t:s0 tty=(none) uid=511

        Was caused by:
                Missing or disabled TE allow rule.
                Allow rules may exist but be disabled by boolean settings; check
boolean settings.
                You can see the necessary allow rules by running audit2allow
with this audit message as input.

How reproducible:
Create a policy for a domain that uses dbus. Run the confined domain as user_r.

Steps to Reproduce:
1. Create a policy for a application domain that uses dbus.
2. Run the domain as user_r
Actual results:
Cannot connect to session bus

Expected results:
Not sure. I hoped that these domains would run for a user in the user_r space,

Additional info:

allow user_mugshot_t user_dbusd_t:unix_stream_socket connectto;
will not allow this access.

mono_t is also not able to do this when you run mono_t as user_r.
Comment 1 Daniel Walsh 2007-10-19 10:41:35 EDT
Your policy is wrong.

You need a line like this in your per role instantiation.

dbus_user_bus_client_template($1, $1_mugshot, $1_mugshot_t)

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