[UNIX] Cross Site Scripting in Moodle

From: SecuriTeam (support_at_securiteam.com)
Date: 05/04/04

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Date: 4 May 2004 18:11:28 +0200

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      Cross Site Scripting in Moodle
    ------------------------------------------------------------------------

    SUMMARY

     <http://www.moodle.org> Moodle is "a course management system (CMS)". A
    vulnerability in the program allows remote attackers to cause the product
    to insert third-party content into its web page and present it as its own.

    DETAILS

    Vulnerable Systems:
     * Moodle version 1.2 and prior

    Immune Systems:
     * Moodle version 1.3 or newer

    It is possible to execute any HTML/JavaScript command in help.php file by
    requesting:
    http://{some_moodle_site}/help.php?text=}></script>

    The client accessing that URL will execute the code in
    {url_to_script_to_execute}. The bug enables to get users' session id's by
    writing a special script and use it to login as that user.

    Solution:
    This bug has been fixed in version 1.3, upgrade to version 1.3 or newer.
    For version 1.2 replace line 75:
    75| echo "$text";
    With
    75| echo clean_text($text);

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:silence10@wp.pl> Bartek
    Nowotarski.

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