[UNIX] Web Portal System Command Execution Vulnerability (wps_shop.cgi)

From: SecuriTeam (support_at_securiteam.com)
Date: 07/21/05

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Date: 21 Jul 2005 13:50:13 +0200

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      Web Portal System Command Execution Vulnerability (wps_shop.cgi)
    ------------------------------------------------------------------------

    SUMMARY

     <http://webportalsystem.it/> WPS Web-Portal-System - "a CMS widely used
    in Germany and Italy". An attacker may exploit a command execution
    vulnerability in WPS by adding special parameters to it's wps_shop.cgi
    script.

    DETAILS

    Vulnerable Systems:
     * WPS Web-Portal-System version 0.7.0 (wps_shop.cgi)

    Vulnerable code :
    There is no filtering special character when open file in sub showartikel.
    ###########
    sub showartikel {
    ###########
    cartfooter();
    open(DATA, "$shopcatsdir/$info{'cat'}/$info{'art'}");
    lock(DATA);
    ......................................
    ......................................

    }

    Workaround:
    For a fix, add:
    $info{'art'} =~ s/[;\*\|'&\$!?#\(\)\[\]\{\}:'"\\]//go;

    Before the following line:
    open(DATA, "$shopcatsdir/$info{'cat'}/$info{'art'}");
    }

    Disclosure Timeline:
     * Juni 2005 - bug found, Vendor website seem down and this hole not
    comfirmed to vendor
     * July 2005 - Public disclosure

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:blahplok@yahoo.com>
    blahplok.

    ========================================

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