Red Hat: RHSA-2014:1972-01 Low Severity: Httpd Security Update

The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.
A NULL pointer dereference flaw was found in the way the mod_cache httpd module handled Content-Type headers. A malicious HTTP server could cause the httpd child process to crash when the Apache HTTP server was configured to proxy to a server with caching enabled. (CVE-2014-3581)
A flaw was found in the way httpd handled HTTP Trailer headers when processing requests using chunked encoding. A malicious client could use Trailer headers to set additional HTTP headers after header processing was performed by other modules. This could, for example, lead to a bypass of header restrictions defined with mod_headers. (CVE-2013-5704)
Note: With this update, httpd has been modified to not merge HTTP Trailer headers with other HTTP request headers. A newly introduced configuration directive MergeTrailers can be used to re-enable the old method of processing Trailer headers, which also re-introduces the aforementioned flaw.
This update also fixes the following bug:
* Prior to this update, the mod_proxy_wstunnel module failed to set up an SSL connection when configured to use a back end server using the "wss:" URL scheme, causing proxied connections to fail. In these updated packages, SSL is used when proxying to "wss:" back end servers. (BZ#1141950)
All httpd24-httpd users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. After installing the updated packages, the httpd24-httpd service will be restarted automatically.