firefox on rawhide and selinux

Antonio Olivares olivares14031 at
Mon Jun 8 20:21:59 UTC 2009


SELinux is preventing firefox from changing a writable memory segment

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
( 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 unconfined_execmem_exec_t. "chcon -t unconfined_execmem_exec_t
'/usr/lib/firefox-3.5b4/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 unconfined_execmem_exec_t '/usr/lib/firefox-3.5b4/firefox'"

Fix Command:

chcon -t unconfined_execmem_exec_t '/usr/lib/firefox-3.5b4/firefox'

Additional Information:

Source Context                unconfined_u:unconfined_r:unconfined_t:SystemLow-
Target Context                unconfined_u:unconfined_r:unconfined_t:SystemLow-
Target Objects                None [ process ]
Source                        firefox
Source Path                   /usr/lib/firefox-3.5b4/firefox
Port                          <Unknown>
Host                          localhost.localdomain
Source RPM Packages           firefox-3.5-0.21.beta4.fc12
Target RPM Packages           
Policy RPM                    selinux-policy-3.6.13-2.fc12
Selinux Enabled               True
Policy Type                   targeted
MLS Enabled                   True
Enforcing Mode                Enforcing
Plugin Name                   allow_execmem
Host Name                     localhost.localdomain
Platform                      Linux localhost.localdomain
                              2.6.30-0.97.rc8.fc12.i586 #1 SMP Wed Jun 3
                              09:55:34 EDT 2009 i686 i686
Alert Count                   8
First Seen                    Mon 08 Jun 2009 12:27:54 PM CDT
Last Seen                     Mon 08 Jun 2009 12:28:08 PM CDT
Local ID                      0e0d62f4-09db-4ddf-987c-8210c45b9e70
Line Numbers                  

Raw Audit Messages            

node=localhost.localdomain type=AVC msg=audit(1244482088.874:27316): avc:  denied  { execmem } for  pid=2566 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=localhost.localdomain type=SYSCALL msg=audit(1244482088.874:27316): arch=40000003 syscall=192 success=no exit=-13 a0=0 a1=2000 a2=7 a3=22 items=0 ppid=2554 pid=2566 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-3.5b4/firefox" subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=(null)




More information about the fedora-selinux-list mailing list