fedora-selinux February 2008 archive
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fedora-selinux: selinux now causing trouble with seamonkey

selinux now causing trouble with seamonkey

From: Antonio Olivares <olivares14031_at_nospam>
Date: Tue Feb 12 2008 - 00:50:21 GMT
To: fedora-test-list@redhat.com


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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