mysql is vulnerable to authorization bypass attacks. The vulnerability exists as MySQL 5.0.88, and possibly other versions and platforms, allows local users to bypass certain privilege checks by calling CREATE TABLE on a MyISAM table with modified (1) DATA DIRECTORY or (2) INDEX DIRECTORY arguments that are originally associated with pathnames without symlinks, and that can point to tables created at a future time at which a pathname is modified to contain a symlink to a subdirectory of the MySQL data home directory, related to incorrect calculation of the mysql_unpacked_real_data_home value. NOTE: this vulnerability exists because of a CVE-2009-4030 regression, which was not omitted in other packages and versions such as MySQL 5.0.95 in Red Hat Enterprise Linux 6.
rhn.redhat.com/errata/RHSA-2013-0121.html
www.openwall.com/lists/oss-security/2012/09/27/1
www.securityfocus.com/bid/55715
access.redhat.com/security/updates/classification/#low
bugzilla.redhat.com/show_bug.cgi?id=526850
bugzilla.redhat.com/show_bug.cgi?id=528512
bugzilla.redhat.com/show_bug.cgi?id=543730
bugzilla.redhat.com/show_bug.cgi?id=548685
bugzilla.redhat.com/show_bug.cgi?id=654000
bugzilla.redhat.com/show_bug.cgi?id=675906
bugzilla.redhat.com/show_bug.cgi?id=806365
bugzilla.redhat.com/show_bug.cgi?id=860808
rhn.redhat.com/errata/RHSA-2010-0109.html
rhn.redhat.com/errata/RHSA-2012-0127.html
rhn.redhat.com/errata/RHSA-2013-0121.html