Bug 541665

Is this a seamonkey bug?

Summary:

SELinux is preventing /usr/lib/seamonkey-2.0/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.

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
execmem_exec_t. "chcon -t execmem_exec_t '/usr/lib/seamonkey-2.0/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 execmem_exec_t
'/usr/lib/seamonkey-2.0/seamonkey-bin'"

Fix Command:

chcon -t execmem_exec_t '/usr/lib/seamonkey-2.0/seamonkey-bin'

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                        seamonkey-bin
Source Path                   /usr/lib/seamonkey-2.0/seamonkey-bin
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           seamonkey-2.0-7.fc12
Target RPM Packages           
Policy RPM                    selinux-policy-3.6.32-46.fc12
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Plugin Name                   allow_execstack
Host Name                     (removed)
Platform                      Linux (removed) 2.6.31.5-127.fc12.i686.PAE #1 SMP
                              Sat Nov 7 21:25:57 EST 2009 i686 i686
Alert Count                   4
First Seen                    Thu Nov 26 16:31:08 2009
Last Seen                     Thu Nov 26 16:41:25 2009
Local ID                      9942a987-a621-4d4e-87ff-c78dc6e38f96
Line Numbers                  

Raw Audit Messages            

node=(removed) type=AVC msg=audit(1259253685.472:396): avc:  denied  { execstack } for  pid=11345 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

node=(removed) type=SYSCALL msg=audit(1259253685.472:396): arch=40000003 syscall=125 success=no exit=-13 a0=bfd95000 a1=1000 a2=1000007 a3=bfd936e4 items=0 ppid=11341 pid=11345 auid=2742 uid=2742 gid=2400 euid=2742 suid=2742 fsuid=2742 egid=2400 sgid=2400 fsgid=2400 tty=(none) ses=1 comm="seamonkey-bin" exe="/usr/lib/seamonkey-2.0/seamonkey-bin" subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=(null)



Hash String generated from  selinux-policy-3.6.32-46.fc12,allow_execstack,seamonkey-bin,unconfined_t,unconfined_t,process,execstack
audit2allow suggests:

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