The httpd packages provide the Apache HTTP Server, a powerful, efficient,and extensible web server.A flaw was found in the way httpd handled HTTP Trailer headers whenprocessing requests using chunked encoding. A malicious client could useTrailer headers to set additional HTTP headers after header processing wasperformed by other modules. This could, for example, lead to a bypass ofheader restrictions defined with mod_headers. (CVE-2013-5704)This update also fixes the following bugs:In addition, this update adds the following enhancement:Users of httpd are advised to upgrade to these updated packages, whichcontain backported patches to correct these issues and add thisenhancement. After installing the updated packages, the httpd service willbe restarted automatically.