Hi,
Summary:
SELinux is preventing firefox from changing a writable memory segment
executable.
Detailed Description:
[SELinux is in permissive mode, the operation would have been denied but was
permitted due to permissive mode.]
The firefox 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 firefox 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 firefox to run correctly, you can change the context of the
executable to unconfined_execmem_exec_t. "chcon -t unconfined_execmem_exec_t
'/usr/lib/firefox-3.0.2/firefox'". 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/firefox-3.0.2/firefox'"
Fix Command:
chcon -t unconfined_execmem_exec_t '/usr/lib/firefox-3.0.2/firefox'
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 mplayer
Source Path /usr/bin/mplayer
Port <Unknown>
Host sundaram
Source RPM Packages firefox-3.0.2-1.fc10
Target RPM Packages
Policy RPM selinux-policy-3.5.12-2.fc10
Selinux Enabled True
Policy Type targeted
MLS Enabled True
Enforcing Mode Permissive
Plugin Name allow_execmem
Host Name sundaram
Platform Linux sundaram2.6.27-13.fc10.i686
#1 SMP Wed Oct 15 02:06:26 EDT 2008 i686 i686
Alert Count 2203
First Seen Thu 09 Oct 2008 01:27:29 PM IST
Last Seen Sat 18 Oct 2008 01:38:06 AM IST
Local ID 38a635ac-3f04-4c17-a077-0fc45f309767
Line Numbers
Raw Audit Messages
node=type=AVC msg=audit(1224274086.429:152): avc: denied { execmem }
for pid=30194 comm="firefox"
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=sundaram type=SYSCALL msg=audit(1224274086.429:152): arch=40000003
syscall=125 success=yes exit=0 a0=b2ce4000 a1=1000 a2=5 a3=bfaf8f0c
items=0 ppid=30180 pid=30194 auid=500 uid=500 gid=500 euid=500 suid=500
fsuid=500 egid=500 sgid=500 fsgid=500 tty=(none) ses=1 comm="firefox"
exe="/usr/lib/firefox-3.0.2/firefox"
subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=(null)
---
Rahul
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