bugtraq - Reflected Cross-Site Scripting (XSS) in e107

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Message-Id: <20140716101015.544832D4387B@htbridge.ch>
Date: Wed, 16 Jul 2014 12:10:15 +0200 (CEST)
From: High-Tech Bridge Security Research <advisory@...ridge.com>
To: bugtraq@...urityfocus.com
Subject: Reflected Cross-Site Scripting (XSS) in e107

Advisory ID: HTB23220
Product: e107
Vendor: e107
Vulnerable Version(s): 2.0 alpha2 and probably prior
Tested Version: 2.0 alpha2
Advisory Publication:  June 18, 2014  [without technical details]
Vendor Notification: June 18, 2014 
Vendor Patch: June 27, 2014 
Public Disclosure: July 16, 2014 
Vulnerability Type: Cross-Site Scripting [CWE-79]
CVE Reference: CVE-2014-4734
Risk Level: Low 
CVSSv2 Base Score: 2.6 (AV:N/AC:H/Au:N/C:N/I:P/A:N)
Solution Status: Fixed by Vendor
Discovered and Provided: High-Tech Bridge Security Research Lab ( https://www.htbridge.com/advisory/ ) 

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Advisory Details:

High-Tech Bridge Security Research Lab discovered vulnerability in e107, which can be exploited to perform Cross-Site Scripting (XSS) attacks.

1) Reflected Cross-Site Scripting (XSS) in e107: CVE-2014-4734

The vulnerability exists due to insufficient sanitization of "type" HTTP GET parameter passed to "/e107_admin/db.php" script. A remote attacker can trick a logged-in administrator to follow a specially crafted link and execute arbitrary HTML and scripting code in administrator’s browser. 

Using advanced XSS techniques a remote attacker can gain complete access over administrator’s session and perform arbitrary actions as web application administrator. 

The following exploitation example displays JS pop-up with "immuniweb" word when the administrator hits the "submit" button:

http://[host]/e107_admin/db.php?mode=pref_editor&type=123%27%20onsubmit=%22alert%28%27immuniweb%27%29%3b%22%20a=%27

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Solution:

Update e107_admin/db.php file from GitHub.

More Information:
https://github.com/e107inc/e107/commit/f80e417bb3e7ab5c1a89ea9ddd2cd060f54464e1
https://github.com/e107inc/e107/commit/e3088a877f94ac465555173e28b2f7f4a4f6d5e8

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References:

[1] High-Tech Bridge Advisory HTB23220 - https://www.htbridge.com/advisory/HTB23220 - Reflected Cross-Site Scripting (XSS) in e107.
[2] e107 - http://e107.org - Powerful Website Content Management System.
[3] Common Vulnerabilities and Exposures (CVE) - http://cve.mitre.org/ - international in scope and free for public use, CVE® is a dictionary of publicly known information security vulnerabilities and exposures.
[4] Common Weakness Enumeration (CWE) - http://cwe.mitre.org - targeted to developers and security practitioners, CWE is a formal list of software weakness types.
[5] ImmuniWeb® SaaS - https://www.htbridge.com/immuniweb/ - hybrid of manual web application penetration test and cutting-edge vulnerability scanner available online via a Software-as-a-Service (SaaS) model.

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Disclaimer: The information provided in this Advisory is provided "as is" and without any warranty of any kind. Details of this Advisory may be updated in order to provide as accurate information as possible. The latest version of the Advisory is available on web page [1] in the References.