A unknown flaw in the code for processing byte range headers allows versions 2.2.x of the Apache Web Server to be crippled from a single PC. A suitable “Apache Killer” Perl script that impressively demonstrates the problem. This has been assigned CVE-2011-3192 as its CVE identifier.
How killapache Works:-
killapache sends GET requests with multiple “byte ranges” that will claim large portions of the system’s memory space. A “byte range” statement allows a browser to only load certain parts of a document, for example bytes 500 to 1000. It is normally used while downloading large files. This method is used by programs such as download clients to resume downloads that have been interrupted; it is designed to reduce bandwidth requirements. However, it appears that stating multiple unsorted components in the header can cause an Apache server to malfunction.
To download the Killapache Perl file Click Here
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