C1c4Tr1Z has reported some vulnerabilities in H-Sphere, which can be exploited by malicious people to conduct cross-site scripting and cross-site request forgery attacks.

1) Input passed to the "fn" parameter in actions.php (when "m" is set to "dload"), "mask" in actions.php (when "m" is set to "search"), and "tab" in actions.php (when "m" is set to "sysinfo") is not properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.

2) The application allows users to perform certain actions via HTTP requests without performing any validity checks to verify the request. This can be exploited to e.g. delete files, create directories, or create files with arbitrary content, by enticing a logged-in user to visit a malicious site.

The vulnerabilities are reported in WebShell version 4.3.10. Other versions may also be affected.

Solution
Filter malicious characters and character sequences in a web proxy. Do not browse untrusted websites while logged on to the application.

Provided and/or discovered by
C1c4Tr1Z

Changelog
Further details available in Customer Area

Original Advisory
http://packetstorm.linuxsecurity.com/0810-exploits/webshell431-xssxsrf.txt

Deep Links
Links available in Customer Area