Уязвимость в Php

Discussion in 'PHP' started by ОТЕЦ, 27 Sep 2006.

  1. ОТЕЦ

    ОТЕЦ Banned

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    Уязвимость связанная с некорректной обработкой функции mysql_error() при обработке результатов SQL-запросов, пишет uinc.ru. Используя эту уязвимость, вы можите передать подобной функции некорректные параметры и, в случае, если результаты передаются пользователю, можно вызвать CSS (Cross Site Scripting). Уязвимости подвержены версии PHP4 < 4.4.4 PHP5 < 5.1.6.
    описание уязвимости:
    mysql_error() can lead to Cross Site Scripting attacks
    ========================================================
    Affected.scr..: PHP4 <= 4.4.4 PHP5 <= 5.1.6
    Advisory.ID...: 11060920
    Risk.level....: Low
    Vendor.Status.: Unpatched
    Src.download..: http://www.php.net/
    Adv.link......: acid-root.new.fr/advisories/11060920.txt
    ========================================================


    ==[ OVERVIEW
    ============
    PHP: Hypertext Preprocessor is an open source server side
    programming language extensively used for web scripts and to
    process data passed via the Common Gateway Interface from
    HTML forms etc. PHP can be written as scripts that reside on
    the server and may produce HTML output that downloads to the
    web browser. Alternatively, PHP can be embedded within HTML
    pages that are then saved with a .php file extension. The PHP
    sections of the page are then parsed by the PHP engine on the
    server and the PHP code stripped out before the page is
    downloaded to the web browser. The name is a bit of a
    programming joke (if there is sucha thing) since it's a
    recursive acronym i.e. the P in PHP stands for PHP.


    ==[ DETAILS
    ===========
    The goal of the mysql_error() function is to return the error
    text from the last MySQL function. This function can lead to
    Cross Site Scripting attacks. To conduct this attack, some
    parameters are required. If an mysql function use a bad parameter
    provided by the attacker and if the mysql_error() result is
    returned to the user, this can be exploited to conduct Cross
    Site Scripting attack. This can be useful if the attacker has
    a restricted access to an mysql function.


    ==[ POC/EXPLOIT
    ===============
    <?php //?db=<script>alert(666)</script>
    $link = mysql_connect("localhost", "root", "");
    mysql_select_db($db, $link);
    echo mysql_errno($link) . ": " . mysql_error($link). "\n";
    ?>


    ==[ LINKS
    =========
    Mysql functions list.: http://www.php.net/manual/en/ref.mysql.php
    Discussion on php.net: http://bugs.php.net/bug.php?id=38733


    ==[ SOLUTION
    ============
    No response from PHP Team.


    ==[ TIMELINE
    ============
    06. Sept. 2006 - Vendor contacted
    20. Sept. 2006 - Public disclosure


    ==[ CONTACT
    ===========
    Author: DarkFig
    Web...: www.acid-root.new.fr
    E-mail: gmdarkfig[*]gmail[*]com (fr/en)
     
  2. darky

    darky ♠ ♦ ♣ ♥

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    угу.. т.е. имея доступ к заливке пхп скрипта на серв, мы можем вызвать ксс.. очень нужная вещь )
     
    1 person likes this.
  3. k1b0rg

    k1b0rg Тут может быть ваша реклама.

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    sql+xss есть такая бяка
     
  4. darky

    darky ♠ ♦ ♣ ♥

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    2k1b0rg ты про ту что в ксакепе описывали?
    ну ды ксудя по тому описанию можно было провести обычную ксс... зачем мутить юнион селект + ксс. мб конечно я не особо воткнул, но по-моему бредово
     
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