Bug 549999

Summary:

SELinux is preventing /usr/bin/python from loading
/usr/lib/python2.6/site-packages/pymedia/muxer.so which requires text
relocation.

Detailed Description:

The python application attempted to load
/usr/lib/python2.6/site-packages/pymedia/muxer.so 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/python2.6/site-packages/pymedia/muxer.so to use relocation as a
workaround, until the library is fixed. Please file a bug report.

Allowing Access:

If you trust /usr/lib/python2.6/site-packages/pymedia/muxer.so to run correctly,
you can change the file context to textrel_shlib_t. "chcon -t textrel_shlib_t
'/usr/lib/python2.6/site-packages/pymedia/muxer.so'" 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/python2.6/site-packages/pymedia/muxer.so'"

Fix Command:

chcon -t textrel_shlib_t '/usr/lib/python2.6/site-packages/pymedia/muxer.so'

Additional Information:

Source Context                unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1
                              023
Target Context                unconfined_u:object_r:lib_t:s0
Target Objects                /usr/lib/python2.6/site-packages/pymedia/muxer.so
                              [ file ]
Source                        python
Source Path                   /usr/bin/python
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           python-2.6.2-2.fc12
Target RPM Packages           
Policy RPM                    selinux-policy-3.6.32-56.fc12
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Plugin Name                   allow_execmod
Host Name                     (removed)
Platform                      Linux (removed) 2.6.31.6-166.fc12.i686
                              #1 SMP Wed Dec 9 11:14:59 EST 2009 i686 i686
Alert Count                   4
First Seen                    Thu 17 Dec 2009 12:25:26 AM CET
Last Seen                     Thu 17 Dec 2009 12:27:18 AM CET
Local ID                      c70f1905-3205-4927-9963-e3f4b6ffd52d
Line Numbers                  

Raw Audit Messages            

node=(removed) type=AVC msg=audit(1261006038.249:57): avc:  denied  { execmod } for  pid=4714 comm="python" path="/usr/lib/python2.6/site-packages/pymedia/muxer.so" dev=sda3 ino=215259 scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:lib_t:s0 tclass=file

node=(removed) type=SYSCALL msg=audit(1261006038.249:57): arch=40000003 syscall=125 success=no exit=-13 a0=3a3000 a1=1f000 a2=5 a3=bf8853d0 items=0 ppid=3590 pid=4714 auid=500 uid=500 gid=500 euid=500 suid=500 fsuid=500 egid=500 sgid=500 fsgid=500 tty=pts3 ses=1 comm="python" exe="/usr/bin/python" subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=(null)



Hash String generated from  selinux-policy-3.6.32-56.fc12,allow_execmod,python,unconfined_t,lib_t,file,execmod
audit2allow suggests:

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