[KAPDA::#50]MyBB 1.1.4 Multiple Vuln

SQL_Injection & XSS

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KAPDA New Advisory .
https://www.kapda.ir/advisory-349.html

ORIGINAL ADVISORY:
https://myimei.com/security/2006-06-24/mybb...verwriting.html
https://myimei.com/security/2006-06-22/mybb...in-url-tag.html

-Summary-
Software: MyBB
Sowtwares Web Site: https://www.mybboard.com
Versions: 1.1.3 And 1.1.4
Class: Remote
Status: Patched
Exploit: Available
Discovered by: imei addmimistrator
Risk Level: Medium
Description
Variable-overwriting :
There is a security bug in MyBB 1.1.4 software (latest version fully patched) that allows attacker initualize arbitary varables with arbitary values and perform many attck kinds same SQLINJECTION attack.

bug is in result of Extracting values. In fact forgetting to define KILL_GLOBALS constant in /archive/index.php file is reason of this weakness. cause of this flew, an attacker can insert his varables and overwrite his values.
XSS :
Mybb has a security bug that allows hackers run unwanted scripts into clients browser that well known as XSS Cross_Site_Scripting attack.
bug is in result of poor cheknig for unicode inputs in url, that results to executing javascript direct call in some common beowser, as IE, FF and etc this is cause of this fact that browsers pay attention to unicode data but mybb dont.
See Also
Variable-overwriting :
{inc/init.php}near 28
if(!defined(KILL_GLOBALS))
{
@extract($_POST, EXTR_OVERWRITE);
@extract($_GET, EXTR_OVERWRITE);
}
XSS:
{inc/functions_post.php}near 138
function fixjavascript($message)
{
$message = preg_replace(#javascript:#i, java script:, $message);
/* .. */

{alos near 19}
$message = preg_replace(#&(?!\#[0-9]+;)#si, &, $message); // fix & but allow unicode.
Exploit-
Variable-overwriting : mybb/archive/index.php?_SERVER[HTTP_CLIENT_IP]=sql
XSS :
post this message:
[url]javascript:alert(imei is Here);//://ddd[/url]
Solution
upgrade to vendors provided patch
Credit
Discovered by: imei addmimistrator
addmimistrator(4}gmail(O}com
imei(4}Kapda(O}IR
www.myimei.com
myimei.com/security
www.kapda.ir/advisory-349.html