[NT] Cisco Clean Access Authentication Bypass

From: SecuriTeam (support_at_securiteam.com)
Date: 08/25/05

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Date: 25 Aug 2005 12:06:11 +0200

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      Cisco Clean Access Authentication Bypass
    ------------------------------------------------------------------------

    SUMMARY

    " <http://www.cisco.com/en/US/products/ps6128/> Cisco Clean Access is an
    easily deployed software solution that can automatically detect, isolate,
    and clean infected or vulnerable devices that attempt to access your
    network."

    By Crafting special request, attackers can bypass Cisco Clean Access
    Agent's mandatory installation.

    DETAILS

    Vulnerable Systems:
     * Cisco Clean Access Agent version 3.5.4
     * Cisco Clean Access Agent version 3.5.3.1

    End users can bypass the "mandatory" installation of the Clean Access
    Agent by changing the User-Agent string of their browser. This allows them
    to connect to the network without the host-based checks being run. If
    configured, remote checks are still run.

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:llhansen-bugtraq@adams.edu>
    llhansen.

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