I have talked about ApacheKiller flaw in detail here with possible workaround to mitigate this flaw.
Last week, a DDoS mitigation service vendor Arbor Networks revealed a detailed report can be download from here which say,
Few months back we posted Apache Range Byte flaw named ‘KillApache’ where we posted a perl script that can be use to freeze Apache web server in seconds(We have tested it) This time Miroslave Stampar(Co-Author of SQLMap tool) written this tool with few extended features in python scripting language named it ‘KillApachePy’
New enhancements :
You can download it from github