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Go Back   Linux Archive > Redhat > Fedora SELinux Support

 
 
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Old 02-11-2008, 11:50 PM
Antonio Olivares
 
Default selinux now causing trouble with seamonkey

Dear all,

In addition to the bug filed
https://bugzilla.redhat.com/show_bug.cgi?id=432198

selinux now is causing trouble with seamonkey.

I deleted the ~/.mozilla/ directory and started from
scratch. So the argument about the plugins will not
work now

Am I the only one seeing this?
I feel kind of bad about complaining that selinux is
doing this, but it did not happen before and now it
does, both with firefox and with seamonkey.

Here's the message

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'"

The following command will allow this access:

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-1.1.8-3.fc9
Target RPM Packages
Policy RPM
selinux-policy-3.2.7-1.fc9
Selinux Enabled True
Policy Type targeted
MLS Enabled True
Enforcing Mode Enforcing
Plugin Name allow_execstack
Host Name localhost
Platform Linux localhost
2.6.24.1-28.fc9 #1 SMP Sun Feb 10
17:27:37 EST 2008 i686
athlon
Alert Count 33
First Seen Fri 01 Feb 2008 05:08:54
PM CST
Last Seen Mon 11 Feb 2008 06:39:47
PM CST
Local ID
c4806f30-a6dc-43b0-8901-5531075795f7
Line Numbers

Raw Audit Messages

host=localhost type=AVC msg=audit(1202776787.936:31):
avc: denied { execstack } for pid=3481
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(1202776787.936:31): arch=40000003
syscall=125 success=no exit=-13 a0=bff2d000 a1=1000
a2=1000007 a3=fffff000 items=0 ppid=1 pid=3481
auid=500 uid=500 gid=500 euid=500 suid=500 fsuid=500
egid=500 sgid=500 fsgid=500 tty=(none)
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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