Bug 467170

Description of problem:
With SELinux enforcing and allow_execmem set to false, scalc.bin causes a SELinux alert

Version-Release number of selected component (if applicable):
openoffice.org-calc-2.4.1-17.6.fc9.x86_64

How reproducible:
Always

Steps to Reproduce:
1. Make sure SELinux is enforcing and allow_execmem is unset [semanage boolean --off allow_execmem]
2. Start openoffice spreadsheet
3. Look in audit log file or use setroubleshoot
  
Actual results: From setroubleshoot -

+++[cut]+++

Summary:

SELinux is preventing scalc.bin from changing a writable memory segment
executable.

Detailed Description:

The scalc.bin 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 scalc.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:

If you trust scalc.bin to run correctly, you can change the context of the
executable to unconfined_execmem_exec_t. "chcon -t unconfined_execmem_exec_t
'/usr/lib64/openoffice.org/program/scalc.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/lib64/openoffice.org/program/scalc.bin'"

Fix Command:

chcon -t unconfined_execmem_exec_t '/usr/lib64/openoffice.org/program/scalc.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                        gnome-screensav
Source Path                   /usr/libexec/gnome-screensaver-gl-helper
Port                          <Unknown>
Host                          xxx
Source RPM Packages           openoffice.org-calc-2.4.1-17.6.fc9
Target RPM Packages           
Policy RPM                    selinux-policy-3.3.1-95.fc9
Selinux Enabled               True
Policy Type                   targeted
MLS Enabled                   True
Enforcing Mode                Enforcing
Plugin Name                   allow_execmem
Host Name                     xxx
Platform                      Linux xxx 2.6.26.5-45.fc9.x86_64 #1
                              SMP Sat Sep 20 03:23:12 EDT 2008 x86_64 x86_64
Alert Count                   9
First Seen                    Wed 15 Oct 2008 13:47:01 BST
Last Seen                     Thu 16 Oct 2008 07:58:20 BST
Local ID                      056ea6f4-cdfb-479d-8907-716459ae5099
Line Numbers                  

Raw Audit Messages            

host=xxx type=AVC msg=audit(1224140300.345:2085): avc:  denied  { execmem } for  pid=12645 comm="scalc.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=xxx type=SYSCALL msg=audit(1224140300.345:2085): arch=c000003e syscall=9 success=no exit=-13 a0=2c7000 a1=34000 a2=7 a3=812 items=0 ppid=12634 pid=12645 auid=500 uid=500 gid=500 euid=500 suid=500 fsuid=500 egid=500 sgid=500 fsgid=500 tty=(none) ses=1 comm="scalc.bin" exe="/usr/lib64/openoffice.org/program/scalc.bin" subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=(null)



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Expected results:
No SELinux violation, ideally by not changing the memory segment but at least by labeling soffice.bin correctly.

Additional info: