Summary SELinux is preventing firefox(/usr/lib/firefox-3.0b3pre/firefox) from making the program stack executable. Detailed Description The firefox(/usr/lib/firefox-3.0b3pre/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(/usr/lib/firefox-3.0b3pre/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(/usr/lib/firefox-3.0b3pre/firefox) to run correctly, you can change the context of the executable to unconfined_execmem_exec_t. "chcon -t unconfined_execmem_exec_t firefox(/usr/lib/firefox-3.0b3pre/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 firefox(/usr/lib/firefox-3.0b3pre/firefox)" The following command will allow this access: chcon -t unconfined_execmem_exec_t firefox(/usr/lib/firefox-3.0b3pre/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(/usr/lib/firefox-3.0b3pre/firefox) Port <Unknown> Host localhost Source RPM Packages Target RPM Packages Policy RPM selinux-policy-3.2.5-7.fc9 Selinux Enabled True Policy Type targeted MLS Enabled True Enforcing Mode Enforcing Plugin Name allow_execstack Host Name localhost Platform Linux localhost 2.6.24-0.115.rc5.git5.fc9 #1 SMP Tue Dec 18 23:57:17 EST 2007 i686 athlon Alert Count 2 First Seen Thu 03 Jan 2008 01:43:26 PM CST Last Seen Thu 03 Jan 2008 01:43:26 PM CST Local ID 34b8cafb-76b2-4a09-9515-0287ddf573b3 Line Numbers Raw Audit Messages host=localhost type=AVC msg=audit(1199389406.998:23): avc: denied { execstack } for pid=2751 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(1199389406.998:23): arch=40000003 syscall=125 success=no exit=-13 a0=bfa16000 a1=1000 a2=1000007 a3=fffff000 items=0 ppid=1 pid=2751 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-3.0b3pre/firefox" subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=(null) ____________________________________________________________________________________ Looking for last minute shopping deals? Find them fast with Yahoo! Search. http://tools.search.yahoo.com/newsearch/category.php?category=shopping -- fedora-test-list mailing list fedora-test-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-test-list
