#3459: XSS via malicious .torrent file ----------------------------+-------------------- Reporter: jasperla | Type: bug Status: new | Priority: major Milestone: needs verified | Component: Web UI Version: develop | Keywords: ----------------------------+-------------------- The Deluge web ui is vulnerable to XSS through a crafted torrent file.
As the data from torrent files is not properly sanitised it's interpreted directly as HTML. As such someone who supplies the user with a malicious torrent can execute arbitrary Javascript code in the context of the user's browser session. It should be noted that the Tornado webserver is not configured to send any `Content-Security-Policy` headers which can help to mitigate some of the impact. Due to this omission, the attacker can download/upload arbitrary data from/to remote endpoints. It should be noted there is some basic filtering such that a `<script>` doesn't work, but this can be trivially bypassed by using a construct such as `<img src="#" onerror=` or just a hidden, remote iframe which loads the Javascript payload (see the PoC script for an example). This script creates a PoC torrent to demonstrate the vulnerability: https://gist.github.com/jasperla/4e6e06034e1cc4131f62839b46b697ef the attached screenshot is taken after uploading a .torrent file generated by that script. Additionally there are several HTML injection bugs, for example in the ''Connection Manager'', but these are merely bugs as the local user injects the payload as opposed to a remote attacker who uploads a malicious torrent to a public search engine. -- Ticket URL: <https://dev.deluge-torrent.org/ticket/3459> Deluge <https://deluge-torrent.org/> Deluge Project -- You received this message because you are subscribed to the Google Groups "Deluge Dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/deluge-dev/047.78caa21ff4410c9d705792885d5e5756%40deluge-torrent.org.
