Easy File Sharing Webserver Multiple Vulnerabilities
Vendor: EFS Software Inc
Product: Easy File Sharing Webserver
Version: <= 1.25
Website: http://www.sharing-file.com
BID: 11034 11036
CVE: CVE-2004-1743
OSVDB: 9174
SECUNIA: 12372
PACKETSTORM: 34144
Description:
Easy File Sharing Web Server is a file sharing software that allows visitors to upload/download files easily through a Web Browser (IE,Netscape,Opera etc.). It can help you share files with your friends and colleagues. They can download files from your computer or upload files from theirs. They will not be required to install this software or any other software because an internet browser is enough. Easy File Sharing Web Server also provides a Bulletin Board System (Forum). It allows remote users to post messages and files to the forum.

Unauthorized System Access:
The authorization function used by EFS Webserver is supposed to keep just anyone from being able to access your files. But this is not the case and an attacker has read access to the entire hard drive by default.

http://127.0.0.1/disk_c

This url will give an attacker read access to the entire C drive. The issue is exploited by requesting the name of a virtual folder on the server.

Denial of Service:
Easy File Sharing Web Server can be DoS'ed and even remotely crashed by sending a number of large HTTP requests to the web server. The CPU usage goes up to 99% and in some cases crash.

Proof Of Concept:
http://www.gulftech.org/downloads/?file_id=00019

Solution:
Vendor was contacted, but never replied to my emails.

Credits:
James Bercegay of the GulfTech Security Research Team.