Bug 588606

Summary:

SELinux is preventing /usr/lib/firefox-3.6/firefox from loading
/home/.../.mozilla/firefox/v....default/extensions/{340c2bbc-ce74-4362-90b5-7c26312808ef}/platform/Linux_x86-gcc3/components/WeaveCrypto.so
which requires text relocation.

Detailed Description:

The firefox application attempted to load
/home/...i/.mozilla/firefox/v....default/extensions/{340c2bbc-ce74-4362-90b5-7c26312808ef}/platform/Linux_x86-gcc3/components/WeaveCrypto.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
/home/../.mozilla/firefox/v....default/extensions/{340c2bbc-ce74-4362-90b5-7c26312808ef}/platform/Linux_x86-gcc3/components/WeaveCrypto.so
to use relocation as a workaround, until the library is fixed. Please file a bug
report.

Allowing Access:

If you trust
/home/...i/.mozilla/firefox/v....default/extensions/{340c2bbc-ce74-4362-90b5-7c26312808ef}/platform/Linux_x86-gcc3/components/WeaveCrypto.so
to run correctly, you can change the file context to textrel_shlib_t. "chcon -t
textrel_shlib_t
'/home/.../.mozilla/firefox/v......default/extensions/{340c2bbc-ce74-4362-90b5-7c26312808ef}/platform/Linux_x86-gcc3/components/WeaveCrypto.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
'/home/.../.mozilla/firefox/v....default/extensions/{340c2bbc-ce74-4362-90b5-7c26312808ef}/platform/Linux_x86-gcc3/components/WeaveCrypto.so'"

Fix Command:

chcon -t textrel_shlib_t
'/home/.../.mozilla/firefox/v.....default/extensions/{340c2bbc-ce74-4362-90b5-7c26312808ef}/platform/Linux_x86-gcc3/components/WeaveCrypto.so'

Additional Information:

Source Context                unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1
                              023
Target Context                unconfined_u:object_r:mozilla_home_t:s0
Target Objects                /home/.../.mozilla/firefox/v....default/ext
                              ensions/{340c2bbc-ce74-4362-90b5-7c26312808ef}/pla
                              tform/Linux_x86-gcc3/components/WeaveCrypto.so [
                              file ]
Source                        firefox
Source Path                   /usr/lib/firefox-3.6/firefox
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           firefox-3.6.3-4.fc13
Target RPM Packages           
Policy RPM                    selinux-policy-3.7.19-10.fc13
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Plugin Name                   allow_execmod
Host Name                     (removed)
Platform                      Linux (removed) 2.6.33.2-41.fc13.i686 #1
                              SMP Mon Apr 12 14:45:33 UTC 2010 i686 i686
Alert Count                   1
First Seen                    Tue 04 May 2010 05:50:22 AM CEST
Last Seen                     Tue 04 May 2010 05:50:22 AM CEST
Local ID                      3c33691b-580f-41f5-bcad-ad7e132ff0e8
Line Numbers                  

Raw Audit Messages            

node=(removed) type=AVC msg=audit(1272945022.379:19124): avc:  denied  { execmod } for  pid=2151 comm="firefox" path="/home/.../.mozilla/firefox/v.....default/extensions/{340c2bbc-ce74-4362-90b5-7c26312808ef}/platform/Linux_x86-gcc3/components/WeaveCrypto.so" dev=dm-1 ino=523752 scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:mozilla_home_t:s0 tclass=file

node=(removed) type=SYSCALL msg=audit(1272945022.379:19124): arch=40000003 syscall=125 success=no exit=-13 a0=3e28000 a1=8000 a2=5 a3=bfe7b130 items=0 ppid=2137 pid=2151 auid=500 uid=500 gid=500 euid=500 suid=500 fsuid=500 egid=500 sgid=500 fsgid=500 tty=(none) ses=1 comm="firefox" exe="/usr/lib/firefox-3.6/firefox" subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=(null)



Hash String generated from  allow_execmod,firefox,unconfined_t,mozilla_home_t,file,execmod
audit2allow suggests:

#============= unconfined_t ==============
#!!!! This avc can be allowed using the boolean 'allow_execmod'

allow unconfined_t mozilla_home_t:file execmod;