ATutor 2.0.2 (lang) HTTP Response Splitting Vulnerability

Risk: Low
Local: No
Remote: Yes

ATutor 2.0.2 (lang) HTTP Response Splitting Vulnerability Vendor: ATutor (Inclusive Design Institute) Product web page: Affected version: 2.0.2 (build r10589) Summary: ATutor is an Open Source Web-based Learning Content Management System (LCMS) designed with accessibility and adaptability in mind. Educators can quickly assemble, package, and redistribute Web-based instructional content, easily retrieve and import prepackaged content, and conduct their courses online. Desc: Input passed to the 'lang' parameter in '/documentation/index_list.php' is not properly sanitised before being returned to the user. This can be exploited to insert arbitrary HTTP headers, which are included in a response sent to the user. ======================== vulnerable code ======================== /documentation/index_list.php: ------------------------------ 1: <?php 2: header('Location: index/index.php?'.$_GET['lang']); 3: exit; 4: ?> ======================= /vulnerable code ======================== Tested on: Microsoft Windows XP Professional SP3 (EN) Apache 2.2.14 (Win32) PHP 5.3.1 MySQL 5.1.41 Vulnerability discovered by Gjoko 'LiquidWorm' Krstic @zeroscience Advisory ID: ZSL-2011-5037 Advisory URL: 31.07.2011 -- [GET] ---- HTTP/1.1 302 Found Date: Sun, 31 Jul 2011 21:08:54 GMT Server: Apache/2.2.14 (Win32) X-Powered-By: PHP/5.3.1 Location: index/index.php? ZSL-Custom-Header: love_injection Content-Length: 0 Connection: close Content-Type: text/html -- Copyleft (c) Zero Science Lab - Information Security Services This advisory is best viewed in maximized Notepad on 1680x1050 screen resolution.


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