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If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important.  If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery.


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Vulnerability Assessment Details

HTTP 1.1 header overflow

Vulnerability Assessment Summary
Too long HTTP 1.1 header kills the web server

Detailed Explanation for this Vulnerability Assessment
It was possible to kill the web server by
sending an invalid request with a too long HTTP 1.1 header
(Accept-Encoding, Accept-Language, Accept-Range, Connection,
Expect, If-Match, If-None-Match, If-Range, If-Unmodified-Since,
Max-Forwards, TE, Host)

A cracker may exploit this vulnerability to make your web server
crash continually or even execute arbirtray code on your system.

Solution : upgrade your software or protect it with a filtering reverse proxy
Network Security Threat Level: High

Networks Security ID: 6951

Vulnerability Assessment Copyright: This script is Copyright (C) 2002 Michel Arboi

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