Aug 13 20:11:41 plato kernel: audit(1155517901.898:9): avc: denied
{ execute } for pid=19354 comm="httpd" name="bash" dev=sda2
ino=5210181 scontext=root:system_r:httpd_t:s0
tcontext=system_u:object_r:shell_exec_t:s0 tclass=file
If you're not running it, you should.