Date: 2 Nov 2004 16:14:32 +0200
From: SecuriTeam <[email protected]>
To: [email protected]Subject: [UNIX] Apache Multiple Space Header DoS
The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
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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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