full-disclosure - YouTube remote unsubscribe exploit

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Message-ID: <20100825171339.GA20888@harry.lu>
Date: Wed, 25 Aug 2010 17:13:39 +0000
From: Harry Strongburg <harry.fd@...ry.lu>
To: full-disclosure@...ts.grok.org.uk
Subject: YouTube remote unsubscribe exploit

A remote unsubscribe exploit has been discovered by an unknown source. 
This allows for a remote user to ubsubscribe another user's subscribers.

Example code:
http://pastebin.com/raw.php?i=3DrGbSMy
http://pastie.org/1115557.txt

You may also manually test out this bug. Send the ubsubscribe request 
numerous times and watch the count of other subscribes go down.

Again, I did not write or discover this problem. It is already well 
known, and I just hope you users here benefit from knowing about it.

Keep safe!

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