[UNIX] Web Calendar Directory Traversal

From: SecuriTeam (support_at_securiteam.com)
Date: 07/21/03

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    To: list@securiteam.com
Date: 21 Jul 2003 11:08:54 +0200

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      Web Calendar Directory Traversal
    ------------------------------------------------------------------------

    SUMMARY

     <http://webcalendar.sourceforge.net/> WebCalendar is a "PHP application
    used to maintain a calendar for one or more persons. WebCalendar requires
    a database: MySQL, Oracle, PostgreSQL, or ODBC".

    A vulnerability in WebCalendar allows a malicious attacker to view
    arbitrary files that reside outside the bounding HTTP root directory.

    DETAILS

    Vulnerable Systems:
     * WebCalendar version 0.9.41 and prior

    Use of an unchecked user provided input in the global variables allows
    remote attackers to cause the product to display files that would be
    otherwise inaccessible (via a directory traversal vulnerability).

    Exploit:
    http://www.example.com/webcalendar/[filename].php?user_inc=../../../../../etc/passwd

    Solution:
    A fix has been published. Download the latest build.
    For more information:
    <http://sourceforge.net/forum/forum.php?thread_id=901234&forum_id=11588>
    http://sourceforge.net/forum/forum.php?thread_id=901234&forum_id=11588

    ADDITIONAL INFORMATION

    The information has been provided by <http://nocon.darkflame.net/> nocon.

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