[NT] Doro Allows Gaining Administrative Privileges

From: SecuriTeam (support_at_securiteam.com)
Date: 12/18/03

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Date: 18 Dec 2003 12:42:54 +0200

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      Doro Allows Gaining Administrative Privileges
    ------------------------------------------------------------------------

    SUMMARY

     <http://www.geocities.com/the_real_sz/misc/doro.htm> Doro is a free tool
    to create pdf files from any Windows program. A vulnerability in the
    product allows local users to gain elevated privileges.

    DETAILS

    Vulnerable systems:
     * Doro version 1.13

    After installing Doro you have a new printer called 'Doro PDF Writer'. If
    you select 'Print' the spooler calls the printer filter 'doro.dll'. The
    'doro.dll' then starts 'doro.exe' and a file requester appears. This means
    that replacing the 'doro.exe' file with a Trojan will allow a local users
    to compromise the server, as the spooler is controlled by the account
    'system' (therefore the file requester has the same rights).

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:ml@portsonline.net> Ramon
    Kukla.

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