RHSA-2011:1391: Moderate: httpd security and bug fix update

First published: Thu Oct 20 2011(Updated: )

The Apache HTTP Server is a popular web server.<br>It was discovered that the Apache HTTP Server did not properly validate the<br>request URI for proxied requests. In certain configurations, if a reverse<br>proxy used the ProxyPassMatch directive, or if it used the RewriteRule<br>directive with the proxy flag, a remote attacker could make the proxy<br>connect to an arbitrary server, possibly disclosing sensitive information<br>from internal web servers not directly accessible to the attacker.<br>(CVE-2011-3368)<br>It was discovered that mod_proxy_ajp incorrectly returned an "Internal<br>Server Error" response when processing certain malformed HTTP requests,<br>which caused the back-end server to be marked as failed in configurations<br>where mod_proxy was used in load balancer mode. A remote attacker could<br>cause mod_proxy to not send requests to back-end AJP (Apache JServ<br>Protocol) servers for the retry timeout period or until all back-end<br>servers were marked as failed. (CVE-2011-3348)<br>Red Hat would like to thank Context Information Security for reporting the<br>CVE-2011-3368 issue.<br>This update also fixes the following bug:<br><li> The fix for CVE-2011-3192 provided by the RHSA-2011:1245 update</li> introduced regressions in the way httpd handled certain Range HTTP header<br>values. This update corrects those regressions. (BZ#736592)<br>All httpd users should upgrade to these updated packages, which contain<br>backported patches to correct these issues. After installing the updated<br>packages, the httpd daemon must be restarted for the update to take effect.<br>

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