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Posted by Jonathan Kart on 07/11/05 20:49
I've been loosely following this thread, and have a question now.
Isn't one advantage of a bbcode type solution that you can more easily
avoid session hijacking vis cross site scripting? If you allow html,
then you open the door for people to add eventhandlers. I guess you
could always strip them, but it seems like for simple stuff bbcode
isn't a bad solution.
On 7/11/05, Richard Davey <rich@launchcode.co.uk> wrote:
> Hello Greg,
>
> Monday, July 11, 2005, 5:06:51 PM, you wrote:
>
> GD> I wouldn't know, <span> isn't one of the tags I allow.
>
> If you stick to the plain vanilla HTML tags such as i, b, u, etc then
> BBCode is pointless - I agreed on this with you several posts ago. I
> don't however use it just for that, I use it to let thousands of kids
> add a little sparkle to their messages/profiles with colours, images,
> etc -- without them having to have good CSS/HTML knowledge (most of them
> could handle a font tag, but that'd break my XHTML Trans). This is the
> point I argued all along to which I get "it's not really a security
> benefit" (no, it's a user benefit) and it's a "misuse of cpu cycles".
>
> For people I hold in such high regard, I'm ashamed at the lot of you :)
>
> GD> I don't bother with perfect tag validation, and I doubt the phpbb
> GD> bbcode people do either since they average about 2-3 exploits a
> GD> month on Bugtraq.
>
> Not that I'd let an install of phpBB anywhere near a site I run, they
> didn't invent BBCode, and in all fairness to those guys the majority
> of their exploits are elsewhere.
>
> GD> I allow a specific set of safe html tags and I provide a preview
> GD> function. Even after that, if the user goofs up I allow a specific
> GD> time span in which to edit the post to correct the goof.
>
> Ditto. I just don't force them to use HTML.
>
> Best regards,
>
> Richard Davey
> --
> http://www.launchcode.co.uk - PHP Development Services
> "I do not fear computers. I fear the lack of them." - Isaac Asimov
>
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