Re: Hashes/Nonce Source and unsafe-inline

On Thu, Dec 12, 2013 at 3:34 PM, Devdatta Akhawe <> wrote:
> Hi
> [creating a separate thread since there were other discussions ongoing
> in the other]
>> 2. 'unsafe-inline' is disabled if either a hash or nonce is present.
>>      [3]
> Imagine a website that wants to control what external scripts are
> loaded. The website uses inline  event handlers too. The hosts for
> external scripts can be dynamic (e.g., it is on a CDN) and thus it
> uses nonces to load them at runtime. In the new design, all the event
> handlers would stop working. I am not sure this is what we want.

Inline event handlers are insecure and prone to XSS, so we want to
block them. There's no point in enabling both unsafe-inline and (hash
or nonce) at the same time. The point of a hash or a nonce is to block
all inline scripts except the ones whitelisted. Allowing inline
scripts completely defeats the purpose of having hashes or nonces.

> Thanks
> Dev

Received on Friday, 13 December 2013 00:01:33 UTC