A Database User Privilege Elevation was found in MySQL. An attacker with 'FILE' privilege could use this flaw elevate its permissions to that of the MySQL admin user.
This issue was assigned CVE-2012-5613.
Some other references:
The issue is disputed:
** DISPUTED **
MySQL 5.5.19 and possibly other versions, and MariaDB 5.5.28a and
possibly other versions, when configured to assign the FILE privilege
to users who should not have administrative privileges, allows remote
authenticated users to gain privileges by leveraging the FILE
privilege to create files as the MySQL administrator. NOTE: the vendor
disputes this issue, stating that this is only a vulnerability when
the administrator does not follow recommendations in the product's
installation documentation. NOTE: it could be argued that this should
not be included in CVE because it is a configuration issue.
This is not a security issue. As per MySQL manual:
* The `FILE' privilege can be abused to read into a database table
any files that the MySQL server can read on the server host. This
includes all world-readable files and files in the server's data
directory. The table can then be accessed using *Note `SELECT':
select. to transfer its contents to the client host.
Red Hat recommends not to grant `FILE' privilege to nonadministrative/untrusted
users. Any user that has this privilege can write a file anywhere in the file
system with the privileges of the mysqld. daemon.
Additionally, MySQL provides a --secure-file-priv option that allows to restrict
all FILE operations to a specific directory.
Closing this bug as a non-issue.
Red Hat Product Security determined that this flaw was not a security vulnerability. See the Bugzilla link for more details.