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Path Traversal in webEdition



Advisory ID: HTB23227
Product: webEdition
Vendor: webEdition e.V.
Vulnerable Version(s): 6.3.8.0 (SVN-Revision: 6985)  and probably prior
Tested Version: 6.3.8.0 (SVN-Revision: 6985) 
Advisory Publication:  August 6, 2014  [without technical details]
Vendor Notification: August 6, 2014 
Vendor Patch: September 4, 2014 
Public Disclosure: September 17, 2014 
Vulnerability Type: Path Traversal [CWE-22]
CVE Reference: CVE-2014-5258
Risk Level: Medium 
CVSSv2 Base Score: 4 (AV:N/AC:L/Au:S/C:P/I:N/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 webEdition, which can be exploited to read arbitrary files on the target system.


1) Path Traversal in webEdition: CVE-2014-5258

The vulnerability exists due to insufficient sanitization of the "file" HTTP GET parameter in "/webEdition/showTempFile.php" script. A remote authenticated user can send a specially crafted HTTP GET request containing directory traversal sequences (e.g. "../") and read contents of arbitrary files on the target system with privileges of the web server.

The exploitation example below display contents of "/etc/passwd" file:

http://[host]/webEdition/showTempFile.php?file=../../../../etc/passwd

Successful exploitation of the vulnerability requires valid user credentials. Registration is not open by default and all user accounts are created by the administrator of the web application. 

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Solution:

Update to webEdition 6.3.9 Beta

More Information:
http://www.webedition.org/de/aktuelles/webedition-cms/webEdition-6.3.9-Beta-erschienen

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References:

[1] High-Tech Bridge Advisory HTB23227 - https://www.htbridge.com/advisory/HTB23227 - Path Traversal in webEdition.
[2] webEdition - http://www.webedition.org - is a 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.