Bug 523959

The following was filed automatically by setroubleshoot:

Summary:

SELinux is preventing /usr/lib/firefox-3.5.3/firefox from changing a writable
memory segment executable.

Detailed Description:

The firefox application attempted to change the access protection of memory
(e.g., allocated using malloc). This is a potential security problem.
Applications should not be doing this. Applications 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. If firefox does not work and you need it to work, you
can configure SELinux temporarily to allow this access until the application is
fixed. Please file a bug report against this package.

Allowing Access:

If you trust firefox to run correctly, you can change the context of the
executable to execmem_exec_t. "chcon -t execmem_exec_t
'/usr/lib/firefox-3.5.3/firefox'". 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 execmem_exec_t '/usr/lib/firefox-3.5.3/firefox'"

Fix Command:

chcon -t execmem_exec_t '/usr/lib/firefox-3.5.3/firefox'

Additional Information:

Source Context                unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1
                              023
Target Context                unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1
                              023
Target Objects                None [ process ]
Source                        mutter
Source Path                   /usr/bin/mutter
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           firefox-3.5.3-1.fc12
Target RPM Packages           
Policy RPM                    selinux-policy-3.6.31-5.fc12
Selinux Enabled               True
Policy Type                   targeted
MLS Enabled                   True
Enforcing Mode                Enforcing
Plugin Name                   allow_execmem
Host Name                     (removed)
Platform                      Linux (removed) 2.6.31-14.fc12.i686 #1 SMP Tue Sep
                              15 04:04:35 EDT 2009 i686 i686
Alert Count                   45
First Seen                    Sat 12 Sep 2009 06:49:32 PM CST
Last Seen                     Thu 17 Sep 2009 08:24:38 PM CST
Local ID                      c2d2ccc9-36c4-4a1e-9e81-a855c650000d
Line Numbers                  

Raw Audit Messages            

node=(removed) type=AVC msg=audit(1253190278.880:25): avc:  denied  { execmem } for  pid=1871 comm="firefox" scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tclass=process

node=(removed) type=SYSCALL msg=audit(1253190278.880:25): arch=40000003 syscall=192 success=no exit=-13 a0=0 a1=2000 a2=7 a3=22 items=0 ppid=1856 pid=1871 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-3.5.3/firefox" subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=(null)


audit2allow suggests:

#============= unconfined_t ==============
allow unconfined_t self:process execmem;