Dear all, I have set settroubleshoot to allow the following: chcon -t unconfined_execmem_exec_t '/usr/lib/firefox-3.0b4pre/firefox' But it is happening again, I do not understand why I need to do it multiple of times. I see a pattern occuring: I have filed a bug report against firefox-b3 https://bugzilla.redhat.com/show_bug.cgi?id=432198 I hope that firefox and selinux start to work together and not against each other. :) Summary: SELinux is preventing firefox from making the program stack executable. Detailed Description: The firefox 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 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: 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 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-3.0b4pre/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-3.0b4pre/firefox'" The following command will allow this access: chcon -t unconfined_execmem_exec_t '/usr/lib/firefox-3.0b4pre/firefox' 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 firefox-3.0-0.beta2.16.nightly20080206.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 2.6.24-23.fc9 #1 SMP Wed Feb 6 11:36:31 EST 2008 i686 athlon Alert Count 11 First Seen Fri 01 Feb 2008 05:08:54 PM CST Last Seen Sat 09 Feb 2008 12:35:06 PM CST Local ID c4806f30-a6dc-43b0-8901-5531075795f7 Line Numbers Raw Audit Messages host=localhost type=AVC msg=audit(1202582106.621:28): avc: denied { execstack } for pid=9246 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 host=localhost type=SYSCALL msg=audit(1202582106.621:28): arch=40000003 syscall=125 success=no exit=-13 a0=bfa71000 a1=1000 a2=1000007 a3=fffff000 items=0 ppid=9232 pid=9246 auid=500 uid=500 gid=500 euid=500 suid=500 fsuid=500 egid=500 sgid=500 fsgid=500 tty=(none) comm="firefox" exe="/usr/lib/firefox-3.0b4pre/firefox" subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=(null) Regards, Antonio ____________________________________________________________________________________ Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs -- fedora-selinux-list mailing list fedora-selinux-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-selinux-list
