Apache have released Patch for the recent range bytes request flaw which we published few days ago. This patch fix the Security flaw and
Change Log :
SECURITY: CVE-2011-3192 (cve.mitre.org) core: Fix handling of byte-range requests to use less memory, to avoid denial of service. If the sum of all ranges in a request is larger than the original file, ignore the ranges and send the complete file. PR 51714.
You can download latest stable release here
If you are running CEntOS, you can update it in this way;
Check update using Yum Utility
yum check-update httpd
yum update httpd
If don’t want to update it, you can see this post for mitigation techniques.