SELinux is preventing seamonkey-bin from making the program stack executable.

[Antonio Olivares]

Dear all,

After applying the fix suggested by Mr. Walsh,
[root at localhost ~]# setsebool -P
allow_unconfined_nsplugin_transition=1
allow_nsplugin_execmem=1
[root at localhost ~]# getsebool -a | grep nsp
allow_nsplugin_execmem --> on
allow_unconfined_nsplugin_transition --> on

Seamonkey is asking permission for the stack.  I do
not want to allow access if it is not correct for
seamonkey to allow stack execution.  Please help me
nail this one as well and crossing my fingers that
firefox/minefield does not ask as well.  


Summary:

SELinux is preventing seamonkey-bin from making the
program stack executable.

Detailed Description:

The seamonkey-bin application attempted to make its
stack executable. This is a
potential security problem. This should never ever be
necessary. Stack memory is
not executable on most OSes these days and this will
not change. Executable
stack memory is one of the biggest security problems.
An execstack error might
in fact be most likely raised by malicious code.
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 seamonkey-bin 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
(http://bugzilla.redhat.com/bugzilla/enter_bug.cgi)
against this package.

Allowing Access:

Sometimes a library is accidentally marked with the
execstack flag, if you find
a library with this flag you can clear it with the
execstack -c LIBRARY_PATH.
Then retry your application. If the app continues to
not work, you can turn the
flag back on with execstack -s LIBRARY_PATH.
Otherwise, if you trust
seamonkey-bin to run correctly, you can change the
context of the executable to
unconfined_execmem_exec_t. "chcon -t
unconfined_execmem_exec_t
'/usr/lib/seamonkey-1.1.8/seamonkey-bin'" 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/seamonkey-1.1.8/seamonkey-bin'"

Fix Command:

chcon -t unconfined_execmem_exec_t
'/usr/lib/seamonkey-1.1.8/seamonkey-bin'

Additional Information:

Source Context               
unconfined_u:unconfined_r:unconfined_t:SystemLow-
                              SystemHigh
Target Context               
unconfined_u:unconfined_r:unconfined_t:SystemLow-
                              SystemHigh
Target Objects                None [ process ]
Source                        firefox
Source Path                  
/usr/lib/firefox-3.0b3pre/firefox
Port                          <Unknown>
Host                          localhost
Source RPM Packages           seamonkey-1.1.8-4.fc9
Target RPM Packages           
Policy RPM                   
selinux-policy-3.3.0-1.fc9
Selinux Enabled               True
Policy Type                   targeted
MLS Enabled                   True
Enforcing Mode                Enforcing
Plugin Name                   allow_execstack
Host Name                     localhost
Platform                      Linux localhost
2.6.25-0.65.rc2.git7.fc9 #1 SMP
                              Sat Feb 23 23:06:09 EST
2008 i686 athlon
Alert Count                   140
First Seen                    Fri 01 Feb 2008 05:08:54
PM CST
Last Seen                     Tue 26 Feb 2008 03:17:04
PM CST
Local ID                     
c4806f30-a6dc-43b0-8901-5531075795f7
Line Numbers                  

Raw Audit Messages            

host=localhost type=AVC msg=audit(1204060624.602:108):
avc:  denied  { execstack } for  pid=20290
comm="seamonkey-bin"
scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023
tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023
tclass=process

host=localhost type=SYSCALL
msg=audit(1204060624.602:108): arch=40000003
syscall=125 success=no exit=-13 a0=bfc72000 a1=1000
a2=1000007 a3=fffff000 items=0 ppid=1 pid=20290
auid=500 uid=500 gid=500 euid=500 suid=500 fsuid=500
egid=500 sgid=500 fsgid=500 tty=(none) ses=1
comm="seamonkey-bin"
exe="/usr/lib/seamonkey-1.1.8/seamonkey-bin"
subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023
key=(null)





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