Bug 536964 - SELinux is preventing /usr/bin/aticonfig from making the program stack executable.
Summary: SELinux is preventing /usr/bin/aticonfig from making the program stack execut...
Keywords:
Status: CLOSED DUPLICATE of bug 533987
Alias: None
Product: Fedora
Classification: Fedora
Component: selinux-policy
Version: 12
Hardware: i386
OS: Linux
low
medium
Target Milestone: ---
Assignee: Daniel Walsh
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: setroubleshoot_trace_hash:e96d75144e7...
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2009-11-11 22:59 UTC by Gleb Sharkunov
Modified: 2010-05-03 08:32 UTC (History)
11 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2009-12-23 16:54:36 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)

Description Gleb Sharkunov 2009-11-11 22:59:12 UTC
Summary:

SELinux is preventing /usr/bin/aticonfig from making the program stack
executable.

Detailed Description:

The aticonfig 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 aticonfig 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 aticonfig
to run correctly, you can change the context of the executable to
execmem_exec_t. "chcon -t execmem_exec_t '/usr/bin/aticonfig'" 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/bin/aticonfig'"

Fix Command:

chcon -t execmem_exec_t '/usr/bin/aticonfig'

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                        aticonfig
Source Path                   /usr/bin/aticonfig
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.6.32-41.fc12
Selinux Enabled               True
Policy Type                   targeted
MLS Enabled                   True
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 athlon
Alert Count                   1
First Seen                    Thu 12 Nov 2009 12:56:31 AM EET
Last Seen                     Thu 12 Nov 2009 12:56:31 AM EET
Local ID                      d7e44be8-98b4-42fd-b4fd-163ab3264e39
Line Numbers                  

Raw Audit Messages            

node=(removed) type=AVC msg=audit(1257980191.847:23653): avc:  denied  { execstack } for  pid=6113 comm="aticonfig" 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(1257980191.847:23653): arch=40000003 syscall=125 success=no exit=-13 a0=bfeb1000 a1=1000 a2=1000007 a3=bfeb15dc items=0 ppid=6095 pid=6113 auid=500 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts0 ses=1 comm="aticonfig" exe="/usr/bin/aticonfig" subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=(null)



Hash String generated from  selinux-policy-3.6.32-41.fc12,allow_execstack,aticonfig,unconfined_t,unconfined_t,process,execstack
audit2allow suggests:

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

Comment 1 Daniel Walsh 2009-11-12 13:42:29 UTC
I don't know anything about aticonfig, but I think the best course of action is to change the context to execmem_exec_t as described above.

Comment 2 Daniel Walsh 2009-12-23 16:54:36 UTC

*** This bug has been marked as a duplicate of bug 533987 ***

Comment 3 atulya.swayankar 2010-01-26 13:18:58 UTC
i was trying to open desktop effect utility then i found this bug.

Comment 4 Daniel Walsh 2010-01-27 14:34:45 UTC
Just turn on the allow_execstack boolean.  I have made that the default going forward.


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