Bug 537967

Summary:

SELinux is preventing /usr/bin/avidemux2_gtk from loading
/usr/lib/libADM5avcodec.so.52 which requires text relocation.

Detailed Description:

The avidemux2_gtk application attempted to load /usr/lib/libADM5avcodec.so.52
which requires text relocation. This is a potential security problem. Most
libraries do not need this permission. Libraries are sometimes coded incorrectly
and request this permission. The SELinux Memory Protection Tests
(http://people.redhat.com/drepper/selinux-mem.html) web page explains how to
remove this requirement. You can configure SELinux temporarily to allow
/usr/lib/libADM5avcodec.so.52 to use relocation as a workaround, until the
library is fixed. Please file a bug report.

Allowing Access:

If you trust /usr/lib/libADM5avcodec.so.52 to run correctly, you can change the
file context to textrel_shlib_t. "chcon -t textrel_shlib_t
'/usr/lib/libADM5avcodec.so.52'" You must also change the default file context
files on the system in order to preserve them even on a full relabel. "semanage
fcontext -a -t textrel_shlib_t '/usr/lib/libADM5avcodec.so.52'"

Fix Command:

chcon -t textrel_shlib_t '/usr/lib/libADM5avcodec.so.52'

Additional Information:

Source Context                unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1
                              023
Target Context                system_u:object_r:lib_t:s0
Target Objects                /usr/lib/libADM5avcodec.so.52 [ file ]
Source                        avidemux2_qt4
Source Path                   /usr/bin/avidemux2_qt4
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           avidemux-gtk-2.5.1-6.20091010svn.fc12
Target RPM Packages           avidemux-libs-2.5.1-6.20091010svn.fc12
Policy RPM                    selinux-policy-3.6.32-41.fc12
Selinux Enabled               True
Policy Type                   targeted
MLS Enabled                   True
Enforcing Mode                Enforcing
Plugin Name                   allow_execmod
Host Name                     (removed)
Platform                      Linux (removed) 2.6.31.5-127.fc12.i686 #1 SMP
                              Sat Nov 7 21:41:45 EST 2009 i686 i686
Alert Count                   5
First Seen                    Tue 17 Nov 2009 12:30:18 AM GMT
Last Seen                     Tue 17 Nov 2009 12:33:38 AM GMT
Local ID                      e50a4d7b-cb5f-409b-96fa-b611029d1262
Line Numbers                  

Raw Audit Messages            

node=(removed) type=AVC msg=audit(1258418018.363:49): avc:  denied  { execmod } for  pid=2603 comm="avidemux2_gtk" path="/usr/lib/libADM5avcodec.so.52" dev=sda1 ino=88538 scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=system_u:object_r:lib_t:s0 tclass=file

node=(removed) type=SYSCALL msg=audit(1258418018.363:49): arch=40000003 syscall=125 success=no exit=-13 a0=e25000 a1=3f0000 a2=5 a3=bfd6c1b0 items=0 ppid=2575 pid=2603 auid=500 uid=500 gid=500 euid=500 suid=500 fsuid=500 egid=500 sgid=500 fsgid=500 tty=pts2 ses=1 comm="avidemux2_gtk" exe="/usr/bin/avidemux2_gtk" subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=(null)



Hash String generated from  selinux-policy-3.6.32-41.fc12,allow_execmod,avidemux2_qt4,unconfined_t,lib_t,file,execmod
audit2allow suggests:

#============= unconfined_t ==============
allow unconfined_t lib_t:file execmod;