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Date: Thu, 30 Jan 2014 14:47:58 -0300
From: Matias Fontanini <matias.fontanini@...il.com>
To: bugtraq@...urityfocus.com
Subject: Joomla! JomSocial component < 3.1.0.1 - Remote code execution
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Joomla! JomSocial component < 3.1.0.1 - Remote code execution
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== Description ==
- Software link: http://www.jomsocial.com/
- Affected versions: All versions >= 2.6 and < 3.1.0.1 are vulnerable.
- Vulnerability discovered by: Matias Fontanini and Gaston Traberg
== Vulnerability ==
The vulnerability is located in the "photos" controller,
"ajaxUploadAvatar" task. The parameters parsed by the "Azrul" plugin are
not properly sanitized before being used in a call to the
"call_user_func_array" PHP function. This allows an attacker to execute
arbitrary static class functions, using any amount of user-provided
parameters. This can be leveraged by calling the "escape" method in the
"CStringHelper" class to execute arbitrary PHP code.
In order to exploit the vulnerability, no authentication is required.
== Proof of concept ==
See the attached python script which allows executing arbitrary code on
a Jommla! application which has the JomSocial component installed.
== Solution ==
Upgrade the product to the 3.1.0.1 version.
== Report timeline ==
[2013-12-12] Vulnerability reported to vendor.
[2013-12-12] Developers answered back.
[2013-12-23] JomSocial 3.1.0.1 was released, which fixes the the
reported issue.
[2014-01-30] Public disclosure.
View attachment "exploit.py" of type "text/x-python" (6777 bytes)
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