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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

CERN HTTPD access control bypass

Vulnerability Assessment Summary
Acertains if web access control can be circumvented

Detailed Explanation for this Vulnerability Assessment

It is possible to access protected web pages
by changing / with // or /./
This was a bug in old versions of CERN web server

A work around consisted in rejecting patterns like:
//*
*//*
/./*
*/./*

Solution : Upgrade your web server or tighten your filtering rules
Network Security Threat Level: High

Networks Security ID:

Vulnerability Assessment Copyright: This script is Copyright (C) 2005 Michel Arboi

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