[UNIX] Apache Multiple Space Header DoS

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  Apache Multiple Space Header DoS
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SUMMARY

The  <http://httpd.apache.org/> Apache Software Foundation's HTTP Server 
Project is an effort to develop and maintain an open-source web server for 
modern operating systems including UNIX and Microsoft Windows".

A remote denial of service attack can be caused by an attacker by sending 
a malformed HTTP request that contains a header with multiple space at its 
begining.

DETAILS

Vulnerable Systems:
 * Apache version 2.0.52

Immune Systems:
 * Apache version 1.3.29

Example:
GET / HTTP/1.0\n
[space] x 8000\n
[space] x 8000\n
[space] x 8000\n


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