Summary:

SELinux is preventing /usr/lib/firefox-3.6/firefox from loading
/home/walt/.mozilla/firefox/5q01kurs.default/extensions/{6AC85730-7D0F-4de0-B3FA-21142DD85326}/platform/Linux/components/ColorZilla.so
which requires text relocation.

Detailed Description:

The firefox application attempted to load
/home/walt/.mozilla/firefox/5q01kurs.default/extensions/{6AC85730-7D0F-4de0-B3FA-21142DD85326}/platform/Linux/components/ColorZilla.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://www.akkadia.org/drepper/selinux-mem.html) web page explains how to
remove this requirement. You can configure SELinux temporarily to allow
/home/walt/.mozilla/firefox/5q01kurs.default/extensions/{6AC85730-7D0F-4de0-B3FA-21142DD85326}/platform/Linux/components/ColorZilla.so
to use relocation as a workaround, until the library is fixed. Please file a bug
report.

Allowing Access:

If you trust
/home/walt/.mozilla/firefox/5q01kurs.default/extensions/{6AC85730-7D0F-4de0-B3FA-21142DD85326}/platform/Linux/components/ColorZilla.so
to run correctly, you can change the file context to textrel_shlib_t. "chcon -t
textrel_shlib_t
'/home/walt/.mozilla/firefox/5q01kurs.default/extensions/{6AC85730-7D0F-4de0-B3FA-21142DD85326}/platform/Linux/components/ColorZilla.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/walt/.mozilla/firefox/5q01kurs.default/extensions/{6AC85730-7D0F-4de0-B3FA-21142DD85326}/platform/Linux/components/ColorZilla.so'"

Fix Command:

chcon -t textrel_shlib_t
'/home/walt/.mozilla/firefox/5q01kurs.default/extensions/{6AC85730-7D0F-4de0-B3FA-21142DD85326}/platform/Linux/components/ColorZilla.so'

Additional Information:

Source Context                user_u:user_r:user_t:s0
Target Context                unconfined_u:object_r:mozilla_home_t:s0
Target Objects                /home/walt/.mozilla/firefox/5q01kurs.default/exten
                              sions/{6AC85730-7D0F-4de0-B3FA-21142DD85326}/platf
                              orm/Linux/components/ColorZilla.so [ file ]
Source                        firefox
Source Path                   /usr/lib/firefox-3.6/firefox
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           firefox-3.6.13-1.fc13
Target RPM Packages           
Policy RPM                    selinux-policy-3.7.19-76.fc13
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Plugin Name                   allow_execmod
Host Name                     (removed)
Platform                      Linux (removed) 2.6.34.7-66.fc13.i686 #1
                              SMP Wed Dec 15 07:40:25 UTC 2010 i686 i686
Alert Count                   10
First Seen                    Mon 03 Jan 2011 09:52:41 AM EST
Last Seen                     Sun 16 Jan 2011 09:55:43 PM EST
Local ID                      ddc75066-b211-4def-ab96-7fa70b9bbf78
Line Numbers                  

Raw Audit Messages            

node=(removed) type=AVC msg=audit(1295232943.395:105225): avc:  denied  { execmod } for  pid=6315 comm="firefox" path="/home/walt/.mozilla/firefox/5q01kurs.default/extensions/{6AC85730-7D0F-4de0-B3FA-21142DD85326}/platform/Linux/components/ColorZilla.so" dev=dm-0 ino=2098387 scontext=user_u:user_r:user_t:s0 tcontext=unconfined_u:object_r:mozilla_home_t:s0 tclass=file

node=(removed) type=SYSCALL msg=audit(1295232943.395:105225): arch=40000003 syscall=125 success=no exit=-13 a0=639000 a1=3000 a2=5 a3=bf979b50 items=0 ppid=6298 pid=6315 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=user_u:user_r:user_t:s0 key=(null)



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

#============= user_t ==============
allow user_t mozilla_home_t:file execmod;