AVC Denial "services"

Daniel J Walsh dwalsh at redhat.com
Wed Sep 3 17:02:24 UTC 2008


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Frank Murphy wrote:
> su - root
> chcon -t bin_t './system-config-services-mechanism.py'
> chcon: cannot access `./system-config-services-mechanism.py': No such
> file or directory
>
chcon -t bin_t \
/usr/share/system-config-services/system-config-services-mechanism.py

The kernel could not reassemble the entire path.

> 
> 
> Summary:
> 
> SELinux is preventing the dbus-daemon-lau (system_dbusd_t) from executing
> ./system-config-services-mechanism.py.
> 
> Detailed Description:
> 
> SELinux has denied the dbus-daemon-lau from executing
> ./system-config-services-mechanism.py. If dbus-daemon-lau is supposed to be able
> to execute ./system-config-services-mechanism.py, this could be a labeling
> problem. Most confined domains are allowed to execute files labeled bin_t. So
> you could change the labeling on this file to bin_t and retry the application.
> If this dbus-daemon-lau is not supposed to execute
> ./system-config-services-mechanism.py, this could signal a intrusion attempt.
> 
> Allowing Access:
> 
> If you want to allow dbus-daemon-lau to execute
> ./system-config-services-mechanism.py: chcon -t bin_t
> './system-config-services-mechanism.py' If this fix works, please update the
> file context on disk, with the following command: semanage fcontext -a -t bin_t
> './system-config-services-mechanism.py' Please specify the full path to the
> executable, Please file a bug report
> (http://bugzilla.redhat.com/bugzilla/enter_bug.cgi) against this selinux-policy
> to make sure this becomes the default labeling.
> 
> Additional Information:
> 
> Source Context                system_u:system_r:system_dbusd_t:s0-s0:c0.c1023
> Target Context                system_u:object_r:usr_t:s0
> Target Objects                ./system-config-services-mechanism.py [ file ]
> Source                        dbus-daemon-lau
> Source Path                   /lib/dbus-1/dbus-daemon-launch-helper
> Port                          <Unknown>
> Host                          rawhide-02
> Source RPM Packages           dbus-1.2.3-1.fc10
> Target RPM Packages
> Policy RPM                    selinux-policy-3.5.1-4.fc10
> Selinux Enabled               True
> Policy Type                   targeted
> MLS Enabled                   True
> Enforcing Mode                Enforcing
> Plugin Name                   execute
> Host Name                     rawhide-02
> Platform                      Linux rawhide-02 2.6.27-0.238.rc2.fc10.i686 #1 SMP
>                               Thu Aug 7 08:00:04 EDT 2008 i686 i686
> Alert Count                   1
> First Seen                    Sat 30 Aug 2008 08:22:57 IST
> Last Seen                     Sat 30 Aug 2008 08:22:57 IST
> Local ID                      ffddfd97-63b1-4809-aee4-c10e29d86722
> Line Numbers
> 
> Raw Audit Messages
> 
> host=rawhide-02 type=AVC msg=audit(1220080977.294:17): avc:  denied  {
> execute } for  pid=3564 comm="dbus-daemon-lau"
> name="system-config-services-mechanism.py" dev=dm-0 ino=2605067
> scontext=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023
> tcontext=system_u:object_r:usr_t:s0 tclass=file
> 
> host=rawhide-02 type=SYSCALL msg=audit(1220080977.294:17):
> arch=40000003 syscall=11 success=no exit=-13 a0=9774018 a1=9773d60
> a2=9773008 a3=b8d9bc items=0 ppid=3563 pid=3564 auid=4294967295 uid=0
> gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none)
> ses=4294967295 comm="dbus-daemon-lau"
> exe="/lib/dbus-1/dbus-daemon-launch-helper"
> subj=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 key=(null)
> 
> --
> fedora-selinux-list mailing list
> fedora-selinux-list at redhat.com
> https://www.redhat.com/mailman/listinfo/fedora-selinux-list

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