Title: Gnut Gnutella Client Arbitrary Script Code Execution Vulnerability
Severity: HIGH
Description:
Gnut is a free, open-source console-based Gnutella file-sharing client for Microsoft Windows and Linux systems.
A problem exists with Gnut's web interface. Webfrontend allows users to perform searches, but when the results of a search are returned the interface will not strip HTML tags from filenames. An attacker could exploit this issue by embedding script code in a filename. Webfrontend is often viewed on "localhost", so therefore the malicious script code may also be executed in the system context rather than Internet context, circumventing the browser-based zone security settings.
This is an example of a filename that will display an alert when it comes up in a search query:
exam<script>alert!</script>ple.mp3
This issue may allow the attacker to gain unauthorized access to resources on the system of the Gnut user.
Affected Products:
- Robert Munafo Gnut 0.4.20
- Robert Munafo Gnut 0.4.21
- Robert Munafo Gnut 0.4.22
- Robert Munafo Gnut 0.4.23
- Robert Munafo Gnut 0.4.24
- Robert Munafo Gnut 0.4.25
- Robert Munafo Gnut 0.4.26
- Robert Munafo Gnut 0.4.27
References:
- Robert Munafo: Gnut Homepage
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