firefox and selinux alert, here's one maybe filed two or three times :(
Antonio Olivares
olivares14031 at yahoo.com
Sun Sep 13 16:53:49 UTC 2009
https://bugzilla.redhat.com/show_bug.cgi?id=522917
Summary:
SELinux is preventing /usr/lib/firefox-3.5.3/firefox from changing a writable
memory segment executable.
Detailed Description:
[firefox has a permissive type (unconfined_t). This access was not denied.]
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 against this package.
Allowing Access:
If you trust firefox to run correctly, you can change the context of the
executable to execmem_exec_t. "chcon -t execmem_exec_t
'/usr/lib/firefox-3.5.3/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 execmem_exec_t '/usr/lib/firefox-3.5.3/firefox'"
Fix Command:
chcon -t execmem_exec_t '/usr/lib/firefox-3.5.3/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 firefox
Source Path /usr/lib/firefox-3.5.3/firefox
Port <Unknown>
Host (removed)
Source RPM Packages firefox-3.5.3-1.fc12
Target RPM Packages
Policy RPM selinux-policy-3.6.31-3.fc12
Selinux Enabled True
Policy Type targeted
MLS Enabled True
Enforcing Mode Enforcing
Plugin Name allow_execmem
Host Name (removed)
Platform Linux localhost.localdomain 2.6.31-2.fc12.i686 #1
SMP Thu Sep 10 00:41:03 EDT 2009 i686 i686
Alert Count 1
First Seen Sun 13 Sep 2009 11:47:14 AM CDT
Last Seen Sun 13 Sep 2009 11:47:14 AM CDT
Local ID 1c10f973-7768-4807-9482-d77739f533a2
Line Numbers
Raw Audit Messages
node=localhost.localdomain type=AVC msg=audit(1252860434.198:37): avc: denied { execmem } for pid=1910 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=localhost.localdomain type=SYSCALL msg=audit(1252860434.198:37): arch=40000003 syscall=192 success=yes exit=1601536 a0=0 a1=1000 a2=7 a3=22 items=0 ppid=1898 pid=1910 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-3.5.3/firefox" subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=(null)
Regards,
Antonio
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