Some vulnerabilities have been discovered in Axon Virtual PBX, which can be exploited by malicious users to manipulate certain data or disclose sensitive information and by malicious people to conduct cross-site scripting and cross-site request forgery attacks.

1) Input passed via the "id" parameter to /extensioninstruction 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 requests. This can be exploited to e.g. delete extensions if a logged-in administrative user visits a malicious web site.

3) Input passed via the "file" parameter to /logdelete is not properly verified before being used to delete files. This can be exploited to delete arbitrary files on the system via directory traversal attacks.

Successful exploitation of this vulnerability requires authentication, but can also be exploited in combination with vulnerability #2.

4) Input passed via the "file" parameter to /logprop is not properly sanitised before being used to read files. This can be exploited to view content of arbitrary files on the system via directory traversal attacks.

Successful exploitation of this vulnerability requires authentication.

The vulnerabilities are confirmed in version 2.13. Other versions may also be affected.

Solution
Filter malicious characters and character sequences in a proxy. Grant only trusted users access to an affected system. Do not visit untrusted web sites or follow untrusted links while being logged-in to the application.

Provided and/or discovered by
Ivan Markovic, Network Security Solutions, reported via Secunia.

Changelog
Further details available to Secunia VIM customers

Deep Links
Links available to Secunia VIM customers